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RISK FACTORS

Investing in our common stock involves a substantial risk of loss. You should carefully consider these risk factors, together with all of the other information included in this prospectus, before you decide to purchase shares of our common stock. If any of the following risks occurred, it could materially adversely affect our business, financial condition or operating results. In that case, the trading price of our common stock could decline, and you may lose part or all of your investment. See the section entitled “Special Note Regarding Forward-Looking Statements and Industry Data” elsewhere in this prospectus.

Risks Related to our Business

Existing electric utility industry regulations, and changes to regulations, may present technical, regulatory and economic barriers to the purchase and use of solar energy systems that may significantly reduce demand for our solar energy systems.

Federal, state and local government regulations and policies concerning the electric utility industry, and internal policies and regulations promulgated by electric utilities, heavily influence the market for electricity generation products and services. These regulations and policies often relate to electricity pricing and the interconnection of customer-owned electricity generation. In the United States, governments and utilities continuously modify these regulations and policies. These regulations and policies could deter customers from purchasing renewable energy, including solar energy systems. This could result in a significant reduction in the potential demand for our solar energy systems. For example, utilities commonly charge fees to larger, industrial customers for disconnecting from the electric grid or for having the capacity to use power from the electric grid for back-up purposes. These fees could increase our customers’ cost to use our systems and make them less desirable, thereby harming our business, prospects, financial condition and results of operations. In addition, depending on the region, electricity generated by solar energy systems competes most effectively with expensive peak-hour electricity from the electric grid, rather than the less expensive average price of electricity. Modifications to the utilities’ peak hour pricing policies or rate design, such as to a flat rate, would require us to lower the price of our solar energy systems to compete with the price of electricity from the electric grid.

In addition, any changes to government or internal utility regulations and policies that favor electric utilities could reduce our competitiveness and cause a significant reduction in demand for our products and services. For example, certain jurisdictions have proposed assessing fees on customers purchasing energy from solar energy systems and a utility in San Diego, California recently attempted to impose a new charge that would disproportionately impact solar energy system customers who utilize net metering, either of which would increase the cost of energy to those customers and could reduce demand for our solar energy systems. Any similar government or utility policies adopted in the future could reduce demand for our products and services and adversely impact our growth.

We rely on net metering and related policies to offer competitive pricing to our customers in some of our key markets.

Forty-three states have a regulatory policy known as net energy metering, or net metering. Each of the states and Washington, D.C., where we currently serve customers has adopted a net metering policy except for Texas, where certain individual utilities have adopted a policy similar to net metering. Net metering typically allows our customers to interconnect their on-site solar energy systems to the utility grid and offset their utility electricity purchases by receiving a bill credit at the utility’s retail rate for energy generated by their solar energy system in excess of electric load that is exported to the grid. At the end of the billing period, the customer simply pays for the net energy used or receives a credit at the retail rate if more energy is produced than consumed. Utilities operating in states without a net metering policy may receive solar electricity that is exported to the grid at times when there is no

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simultaneous energy demand by the customer to utilize the generation onsite without providing any compensation to the customer for this generation. Our ability to sell solar energy systems or the electricity they generate may be adversely impacted by the failure to expand existing limits on the amount of net metering in states that have implemented it, the failure to adopt a net metering policy where it currently is not in place or the imposition of new charges that only or disproportionately impact customers that utilize net metering. Our ability to sell solar energy systems or the electricity they generate also may be adversely impacted by the unavailability of expedited or simplified interconnection for grid-tied solar energy systems or any limitation on the number of customer interconnections or amount of solar energy that utilities are required to allow in their service territory or some part of the grid.

Limits on net metering, interconnection of solar energy systems and other operational policies in key markets could limit the number of solar energy systems installed there. For example, California utilities are currently required to provide net metering to their customers until the total generating capacity of net metered systems exceeds 5% of the utilities’ “aggregate customer peak demand.” This cap on net metering in California was increased to 5% in 2010 as utilities neared the prior cap of 2.5%. If the current net metering caps in California, or other jurisdictions, are reached, future customers will be unable to recognize the cost savings associated with net metering. We substantially rely on net metering when we establish competitive pricing for our prospective customers. The absence of net metering for new customers would greatly limit demand for our solar energy systems.

Our business currently depends on the availability of rebates, tax credits and other financial incentives. The expiration, elimination or reduction of these rebates, credits and incentives would adversely impact our business.

U.S. federal, state and local government bodies provide incentives to end users, distributors, system integrators and manufacturers of solar energy systems to promote solar electricity in the form of rebates, tax credits and other financial incentives such as system performance payments and payments for renewable energy credits associated with renewable energy generation. We rely on these governmental rebates, tax credits and other financial incentives to lower our cost of capital and to incent fund investors to invest in our funds. These incentives enable us to lower the price we charge customers for energy and for our solar energy systems. However, these incentives may expire on a particular date, end when the allocated funding is exhausted, or be reduced or terminated as solar energy adoption rates increase. These reductions or terminations often occur without warning.

The federal government currently offers a 30% investment tax credit under Section 48(a)(3) of the Internal Revenue Code, or the Federal ITC, for the installation of certain solar power facilities until December 31, 2016. This credit is due to adjust to 10% in 2017. Solar energy systems that began construction prior to the end of 2011 were eligible to receive a 30% federal cash grant paid by the U.S. Treasury Department under section 1603 of the “American Recovery and Reinvestment Act of 2009,” or the U.S. Treasury grant, in lieu of the Federal ITC. Pursuant to the Budget Control Act of 2011, U.S. Treasury grants apparently will be subject to sequestration beginning in 2013. The U.S. federal government’s Office of Management and Budget, in a report issued in September 2012, outlined the anticipated sequestration, which would result in a 7.6% reduction in spending for the U.S. Treasury grant program, with a resulting decrease in U.S. Treasury grants received by us. In addition, applicable authorities may adjust or decrease incentives from time to time or include provisions for minimum domestic content requirements or other requirements to qualify for these incentives.

Reductions in, or eliminations or expirations of, governmental incentives could adversely impact our results of operations and ability to compete in our industry by increasing our cost of capital, causing us to increase the prices of our energy and solar energy systems, and reducing the size of our addressable market. In addition, this would adversely impact our ability to attract investment partners

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and to form new investment funds and our ability to offer attractive financing to prospective customers. For the year ended December 31, 2011 and the six months ended June 30, 2012, more than 90% of new customers chose to enter into financed lease or power purchase agreements rather than buying a solar energy system for cash.

Our business depends in part on the regulatory treatment of third-party owned solar energy systems.

Our leases and power purchase agreements are third-party ownership arrangements. Sales of electricity by third parties face regulatory challenges in some states and jurisdictions. Other challenges pertain to whether third-party owned systems qualify for the same levels of rebates or other non-tax incentives available for customer-owned solar energy systems, whether third-party owned systems are eligible at all for these incentives, and whether third-party owned systems are eligible for net metering and the associated significant cost savings. Reductions in, or eliminations of, this treatment of these third-party arrangements could reduce demand for our systems, adversely impact our access to capital and could cause us to increase the price we charge our customers for energy.

The Office of the Inspector General of the U.S. Department of Treasury has issued subpoenas to a number of significant participants in the rooftop solar energy installation industry, including us. The subpoena we received requires us to deliver certain documents in our possession relating to our participation in the U.S. Treasury grant program. These documents will be delivered to the Office of the Inspector General of the U.S. Department of Treasury, which is investigating the administration and implementation of the U.S. Treasury grant program.

In July 2012, we and other companies with significant market share, and other companies related to the solar industry, received subpoenas from the U.S. Department of Treasury’s Office of the Inspector General to deliver certain documents in our respective possession. In particular, our subpoena requested, among other things, documents dated, created, revised or referred to since January 1, 2007 that relate to our applications for U.S. Treasury grants or communications with certain other solar development companies or certain firms that appraise solar energy property for U.S. Treasury grant application purposes. The Inspector General is working with the Civil Division of the U.S. Department of Justice to investigate the administration and implementation of the U.S. Treasury grant program, including possible misrepresentations concerning the fair market value of the solar power systems submitted for grant under that program made in grant applications by companies in the solar industry, including us. We intend to cooperate fully with the Inspector General and the Department of Justice. We anticipate that at least six months will be required to gather all of the requested documents and provide them to the Inspector General, and at least another year following that for the Inspector General to conclude its review of the materials.

We are not aware of, and have not been made aware of, any specific allegations of misconduct or misrepresentation by us or our officers, directors or employees, and no such assertions have been made by the Inspector General or the Department of Justice. However, if at the conclusion of the investigation the Inspector General concludes that misrepresentations were made, the Department of Justice could decide to bring a civil action to recover amounts it believes were improperly paid to us. If it were successful in asserting this action, we could then be required to pay damages and penalties for any funds received based on such misrepresentations (which, in turn, could require us to make indemnity payments to certain of our fund investors). Such consequences could have a material adverse effect on our business, liquidity, financial condition and prospects. Additionally, the period of time necessary to resolve the investigation is uncertain, and this matter could require significant management and financial resources that could otherwise be devoted to the operation of our business.

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The Internal Revenue Service recently notified us that it is conducting an income tax audit of two of our investment funds.

In October of 2012, we were notified that the Internal Revenue Service was commencing income tax audits of two of our investment funds which audit will include a review of the fair market value of the solar power systems submitted for grant under the 1603 Grant Program. If, at the conclusion of the audits currently being conducted, the Internal Revenue Service determines that the valuations were incorrect and that our investment funds received U.S. Treasury grants in excess of the amounts to which they were entitled, we could be subject to tax liabilities, including interest and penalties, and we could be required to make indemnity payments to the fund investors.

If the Internal Revenue Service or the U.S. Treasury Department makes additional determinations that the fair market value of our solar energy systems is materially lower than what we have claimed, we may have to pay significant amounts to our investment funds or to our fund investors and such determinations could have a material adverse effect on our business, financial condition and prospects.

We and our fund investors claim the Federal ITC or the U.S. Treasury grant in amounts based on the fair market value of our solar energy systems. We have obtained independent appraisals to support the fair market values we report for claiming Federal ITCs and U.S. Treasury grants. The Internal Revenue Service and the U.S. Treasury Department review these fair market values. With respect to U.S. Treasury grants, the U.S. Treasury Department reviews the reported fair market value in determining the amount initially awarded, and the Internal Revenue Service and the U.S. Treasury Department may also subsequently audit the fair market value and determine that amounts previously awarded must be repaid to the U.S. Treasury Department. Such audits of a small number of our investment funds are ongoing. With respect to Federal ITCs, the Internal Revenue Service may review the fair market value on audit and determine that the tax credits previously claimed must be reduced. If the fair market value is determined in either of these circumstances to be less than we reported, we may owe the fund or our fund investors an amount equal to this difference, plus any costs and expenses associated with a challenge to that valuation. The U.S. Treasury Department has determined in a small number of instances to award us U.S. Treasury grants for our solar energy systems at a materially lower value than we had established in our appraisals and, as a result, we have been required to pay our fund investors a true-up payment or contribute additional assets to the associated investment funds. For example, in the fourth quarter of 2011, we had discussions with representatives of the U.S. Treasury Department relating to U.S. Treasury grant applications for certain commercial solar energy systems submitted in the third and fourth quarters of 2011 and the appropriate U.S. Treasury grant valuation guidelines for such systems. We were unsuccessful in our attempts to have the U.S. Treasury Department reconsider its valuation for these systems, and while we maintained the accuracy of the contracted value to the investment fund, we elected at that time to receive the lower amounts communicated by the U.S. Treasury Department. Other U.S. Treasury grant applications have been accepted and the U.S. Treasury grant paid in full on the basis of valuations comparable to those projects as to which the U.S. Treasury has determined a significantly lower valuation than that claimed in our U.S. Treasury grant applications. The U.S. Department of Treasury issued valuation guidelines on June 30, 2011, and no grant applications that we have submitted at values below those guidelines have been reduced by the U.S. Treasury Department. If the Internal Revenue Service or the U.S. Treasury Department disagrees now or in the future, as a result of any pending or future audit, the outcome of the Department of Treasury Inspector General investigation or otherwise, with the fair market value of more of our solar energy systems that we have constructed or that we construct in the future, including any systems for which grants have already been paid, and determines we have claimed too high of a fair market value, it could have a material adverse effect on our business, financial condition and prospects. For example, a hypothetical five percent downward adjustment in the fair market value in the approximately $325 million of U.S. Department of Treasury grant applications that we have submitted as of August 31, 2012 would obligate us to repay approximately $16 million to our fund investors.

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Our ability to provide solar energy systems to customers on an economically viable basis depends on our ability to finance these systems with fund investors who require particular tax and other benefits.

Our solar energy systems have been eligible for Federal ITCs or U.S. Treasury grants, as well as depreciation benefits. We have relied on, and will continue to rely on, financing structures that monetize a substantial portion of those benefits and provide financing for our solar energy systems. With the lapse of the U.S. Treasury grant program, we anticipate that our reliance on these tax-advantaged financing structures will increase substantially. If, for any reason, we were unable to continue to monetize those benefits through these arrangements, we may be unable to provide and maintain solar energy systems for new customers on an economically viable basis.

The availability of this tax-advantaged financing depends upon many factors, including:

Under current law, the Federal ITC will be reduced from approximately 30% of the cost of the solar energy systems to approximately 10% for solar energy systems placed in service after December 31, 2016. In addition, U.S. Treasury grants are no longer available for new solar energy systems. Moreover, potential fund investors must remain satisfied that the structures we offer make the tax benefits associated with solar energy systems available to these investors, which depends both on the investors’ assessment of the tax law and the absence of any unfavorable interpretations of that law. Changes in existing law and interpretations by the Internal Revenue Service and the courts could reduce the willingness of fund investors to invest in funds associated with these solar energy system investments. We cannot assure you that this type of financing will be available to us. If, for any reason, we are unable to finance solar energy systems through tax-advantaged structures or if we are unable to realize or monetize depreciation benefits, we may no longer be able to provide solar energy systems to new customers on an economically viable basis. This would have a material adverse effect on our business, financial condition and results of operations.

We need to enter into additional substantial financing arrangements to facilitate our customers’ access to our solar energy systems, and if this financing is not available to us on acceptable terms, if and when needed, our ability to continue to grow our business would be materially adversely impacted.

Our future success depends on our ability to raise capital from third-party fund investors to help finance the deployment of our residential and commercial solar energy systems. In particular, our strategy is to seek to reduce the cost of capital through these arrangements to improve our margins or to offset future reductions in government incentives and to maintain the price competitiveness of our solar energy systems. If we are unable to establish new investment funds when needed, or upon desirable terms, to enable our customers’ access to our solar energy systems with little or no upfront cost, we may be unable to finance installation of our customers’ systems, or our cost of capital could increase, either of which would have a material adverse effect on our business, financial condition and results of operations. To date we have raised capital sufficient to finance installation of our customers’ solar energy systems from a number of financial institutions and other large companies. The contract terms in certain of our investment fund documents condition our ability to draw on investment

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commitments from the fund investors, including if an event occurs that could reasonably be expected to have a material adverse effect on the fund or in one case on us. If we do not satisfy such condition due to events related to our business or a specific investment fund or developments in our industry (including related to the Department of Treasury Inspector General investigation) or otherwise, and as a result we are unable to draw on existing commitments, it could have a material adverse effect on our business, liquidity, financial condition and prospects. If any of the financial institutions or large companies that currently invest in our investment funds decide not to invest in future investment funds to finance our solar energy systems due to general market conditions, concerns about our business or prospects, the pendency of the Department of Treasury Inspector General investigation or any other reason, or materially changed the terms under which they are willing to provide future financing, we will need to identify new financial institutions and companies to invest in our investment funds and negotiate new financing terms.

In the past, we encountered challenges raising new funds, which caused us to delay deployment of a substantial number of solar energy systems for which we had signed leases or power purchase agreements with customers. For example, in late 2008 and early 2009, as a result of the state of the capital markets, our ability to finance the installation of solar energy systems was limited and resulted in a significant backlog of signed sales orders for solar energy systems. Our future ability to obtain additional financing depends on banks’ and other financing sources’ continued confidence in our business model and the renewable energy industry as a whole. If we experience higher customer default rates than we currently experience in our existing investment funds or we lower the credit rating requirement for new customers, this could make it more difficult or costly to attract future financing. Solar energy has yet to achieve broad market acceptance and depends on continued support in the form of performance-based incentives, rebates, tax credits and other incentives from federal, state and foreign governments. If this support diminishes, our ability to obtain external financing on acceptable terms, or at all, could be materially adversely affected. In addition, we face competition for these investor funds. If we are unable to continue to offer a competitive investment profile, we may lose access to these funds or they may only be available on less favorable terms than our competitors. Our current financing sources may be inadequate to support the anticipated growth in our business plans. Our inability to secure financing could lead to cancelled projects and could impair our ability to accept new projects and customers. In addition, our borrowing costs could increase, which would have a material adverse effect on our business, financial condition and results of operations.

A material drop in the retail price of utility-generated electricity or electricity from other sources would harm our business, financial condition and results of operations.

We believe that a customer’s decision to buy renewable energy from us is primarily driven by their desire to pay less for electricity. The customer’s decision may also be affected by the cost of other renewable energy sources. Decreases in the retail prices of electricity from the utilities or from other renewable energy sources would harm our ability to offer competitive pricing and could harm our business. The price of electricity from utilities could decrease as a result of:

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A reduction in utility electricity prices would make the purchase of our solar energy systems or the purchase of energy under our lease and power purchase agreements less economically attractive. In addition, a shift in the timing of peak rates for utility-generated electricity to a time of day when solar energy generation is less efficient could make our solar energy system offerings less competitive and reduce demand for our products and services. If the retail price of energy available from utilities were to decrease due to any of these reasons, or others, we would be at a competitive disadvantage, we may be unable to attract new customers and our growth would be limited.

A material drop in the retail price of utility-generated electricity would particularly adversely impact our ability to attract commercial customers.

Commercial customers comprise a significant and growing portion of our business, and the commercial market for energy is particularly sensitive to price changes. Typically, commercial customers pay less for energy from utilities than residential customers. Because the price we are able to charge commercial customers is only slightly lower than their current retail rate, any decline in the retail rate of energy for commercial entities could have a significant impact on our ability to attract commercial customers. We may be unable to offer solar energy systems for the commercial market that produce electricity at rates that are competitive with the price of retail electricity on a non-subsidized basis. If this were to occur, we would be at a competitive disadvantage to other energy providers and may be unable to attract new commercial customers, and our business would be harmed.

Rising interest rates could adversely impact our business.

Changes in interest rates could have an adverse impact on our business by increasing our cost of capital. For example:

The majority of our cash flows to date have been from solar energy systems under lease and power purchase agreements that have been monetized under various investment fund structures. One of the components of this monetization is the present value of the payment streams from the customers who enter into these leases and power purchase agreements. If the rate of return required by the fund investor rises as a result of a rise in interest rates, it will reduce the present value of the customer payment stream and consequently reduce the total value derived from this monetization. Rising interest rates could harm our business and financial condition.

We have guaranteed a minimum return to be received by an investor in certain of our investment funds and could be adversely affected if we are required to make any payments under those guarantees.

For three of our joint venture investment funds with one investor, with total investments of approximately $86.2 million, we are contractually required to make payments to the investor to ensure the investor achieves a specified minimum internal rate of return in the event of liquidation of the funds or if we purchase the investor’s equity stake in the funds, including following the investor’s exercise of its put right. For another fund with the same investor, we have guaranteed to make payments to the investor to compensate for payments that the investor would be required to make to a certain third party as a result of the investor not achieving a specified minimum internal rate of return in this fund, assessed annually. In both instances, the amounts of potential future payments under these guarantees depends on the amounts and timing of future distributions to the investor from the funds, the tax benefits that accrue to

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the investor from the funds’ activities, and the amounts that we would pay to the investor if we purchase the investor’s stake in the funds or the distributions to the investor upon liquidation of the funds. In a fifth fund with the same investor, we have guaranteed to annually distribute a minimum amount. Because of uncertainties associated with estimating the timing and amounts of distributions to the investor and the possibility for and timing of the liquidation of the funds, we cannot determine the potential maximum future payments that we could have to make under these guarantees. We may agree to similar terms in the future if market conditions require it. Any significant payments that we may be required to make under our guarantees could adversely affect our financial condition.

In our lease pass-through investment funds, there is a one-time reset of the lease payments, and we may be obligated, in connection with the resetting of the lease payments at true up, to refund lease prepayments or to contribute additional assets to the extent the system sizes, costs, and timing are not consistent with the initial lease payment model.

In our lease pass-through investment funds, the models used to calculate the lease prepayments will be updated for each fund at a fixed date occurring after placement in service of all solar systems or an agreed upon date (typically within the first year of the applicable lease term) to reflect certain specified conditions as they exist at such date, including the ultimate system size of the equipment that was leased, how much it cost, and when it went into service. As a result of this true up, the lease payments are resized and we may be obligated to refund the investor’s lease prepayments or to contribute additional assets to the fund. Any significant refunds or capital contributions that we may be required to make could adversely affect our financial condition.

We are not currently regulated as a utility under applicable law, but we may be subject to regulation as a utility in the future.

Federal law and most state laws do not currently regulate us as a utility. As a result, we are not subject to the various federal and state standards, restrictions and regulatory requirements applicable to U.S. utilities. In the United States, we obtain federal and state regulatory exemptions by establishing “Qualifying Facility” status with the Federal Energy Regulatory Commission for all of our qualifying solar energy projects. In Canada, we also are generally subject to the regulations of the relevant energy regulatory agencies applicable to all producers of electricity under the relevant feed-in tariff regulations (including the feed-in tariff rates), however we are not currently subject to regulation as a utility. Our business strategy includes the continued development of larger solar energy systems in the future for our commercial and government customers, which has the potential to impact our regulatory position. Any local, state, federal or foreign regulations could place significant restrictions on our ability to operate our business and execute our business plan by prohibiting or otherwise restricting our sale of electricity. If we were subject to the same state, federal or foreign regulatory authorities as utilities in the United States or if new regulatory bodies were established to oversee our business in the United States or in foreign markets, then our operating costs would materially increase.

A failure to hire and retain a sufficient number of employees in key functions would constrain our growth and our ability to timely complete our customers’ projects.

To support our growth, we need to hire, train, deploy, manage and retain a substantial number of skilled employees. In particular, we need to continue to expand and optimize our sales infrastructure to grow our customer base and our business, and we plan to expand our direct sales force. Identifying and recruiting qualified personnel and training them requires significant time, expense and attention. It can take several months before a new salesperson is fully trained and productive. If we are unable to hire, develop and retain talented sales personnel or if new direct sales personnel are unable to achieve desired productivity levels in a reasonable period of time, we may not be able to realize the expected benefits of this investment or grow our business.

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To complete current and future customer projects and to continue to grow our customer base, we need to hire a large number of installers in the relevant markets. Competition for qualified personnel in our industry is increasing, particularly for skilled installers and other personnel involved in the installation of solar energy systems and delivery of energy products and services. We also compete with the homebuilding and construction industries for skilled labor. As these industries recover and seek to hire additional workers, our cost of labor may increase. The unionization of our labor force could also increase our labor costs. Shortages of skilled labor could significantly delay a project or otherwise increase our costs. Because our profit on a particular installation is based in part on assumptions as to the cost of such project, cost overruns, delays or other execution issues may cause us to not achieve our expected margins or cover our costs for that project. In addition, because we are headquartered in the San Francisco Bay Area, we compete for a limited pool of technical and engineering resources that requires us to pay wages that are competitive with relatively high regional standards for employees in these fields.

If we cannot meet our hiring, retention and efficiency goals, we may be unable to complete our customers’ projects on time, in an acceptable manner or at all. Any significant failures in this regard would materially impair our growth, reputation, business and financial results. If we are required to pay higher compensation than we anticipate, these greater expenses may also adversely impact our financial results and the growth of our business.

It is difficult to evaluate our business and prospects due to our limited operating history.

Since our formation in 2006, we have focused our efforts primarily on the sales, financing, engineering, installation and monitoring of solar energy systems for residential, commercial and government customers. We launched our energy efficiency line of products and services in mid-2010, and revenue attributable to this line of business has not been material compared to revenue attributable to our solar energy systems. We may be unsuccessful in significantly broadening our customer base through installation of solar energy systems within our current markets or in new markets we may enter. Additionally, we cannot assure you that we will be successful in generating substantial revenue from our new energy efficiency products and services or from any additional energy-related products and services we may introduce in the future. Our limited operating history, combined with the rapidly evolving and competitive nature of our industry, may not provide an adequate basis for you to evaluate our operating and financing results and business prospects. In addition, we only have limited insight into emerging trends that may adversely impact our business, prospects and operating results. As a result, our limited operating history may impair our ability to accurately forecast our future performance.

We have incurred losses and may be unable to achieve or sustain profitability in the future.

We have incurred net losses in the past, and we had an accumulated deficit of $70.3 million as of June 30, 2012. We may incur net losses from operations as we increase our spending to finance the expansion of our operations, expand our installation , engineering, administrative, sales and marketing staffs, and implement internal systems and infrastructure to support our growth. We do not know whether our revenue will grow rapidly enough to absorb these costs, and our limited operating history makes it difficult to assess the extent of these expenses or their impact on our operating results. Our ability to achieve profitability depends on a number of factors, including:

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Even if we do achieve profitability, we may be unable to sustain or increase our profitability in the future.

We face competition from both traditional energy companies and renewable energy companies.

The solar energy and renewable energy industries are both highly competitive and continually evolving as participants strive to distinguish themselves within their markets and compete with large utilities. We believe that our primary competitors are the traditional utilities that supply energy to our potential customers. We compete with these utilities primarily based on price, predictability of price, and the ease by which customers can switch to electricity generated by our solar energy systems. If we cannot offer compelling value to our customers based on these factors, then our business will not grow. Utilities generally have substantially greater financial, technical, operational and other resources than we do. As a result of their greater size, these competitors may be able to devote more resources to the research, development, promotion and sale of their products or respond more quickly to evolving industry standards and changes in market conditions than we can. Utilities could also offer other value-added products or services that could help them to compete with us even if the cost of electricity they offer is higher than ours. In addition, a majority of utilities’ sources of electricity is non-solar, which may allow utilities to sell electricity more cheaply than electricity generated by our solar energy systems.

We also compete with solar companies in the downstream value chain of solar energy. For example, we face competition from purely finance driven organizations which then subcontract out the installation of solar energy systems, from installation businesses that seek financing from external parties, from large construction companies and utilities, and increasingly from sophisticated electrical and roofing companies. Some of these competitors specialize in either the residential or commercial solar energy markets, and some may provide energy at lower costs than we do. Many of our competitors also have significant brand name recognition and have extensive knowledge of our target markets. For us to remain competitive, we must distinguish ourselves from our competitors by offering an integrated approach that successfully competes with each level of products and services offered by our competitors at various points in the value chain. If our competitors develop an integrated approach similar to ours including sales, financing, engineering, installation, monitoring and efficiency services, this will reduce our marketplace differentiation.

We also face competition in the energy efficiency evaluation and upgrades market and we expect to face competition in additional markets as we introduce new energy-related products and services. As the solar industry grows and evolves, we will also face new competitors who are not currently in the market. Our failure to adapt to changing market conditions and to compete successfully with existing or new competitors will limit our growth and will have a material adverse effect on our business and prospects.

If we fail to remediate deficiencies in our control environment or are unable to implement and maintain effective internal control over financial reporting in the future, the accuracy and timeliness of our financial reporting may be adversely affected.

In connection with the audits of our consolidated financial statements for 2010 and 2011, we identified material weaknesses in our internal control over financial reporting and inventory processes. A material weakness is a deficiency, or a combination of deficiencies, in internal control over financial reporting, such that there is a reasonable possibility that a material misstatement of a company’s

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annual or interim financial statements will not be prevented or detected on a timely basis. These material weaknesses resulted from an aggregation of deficiencies.

The accounting policies associated with our investment funds are complex, which contributed to the material weaknesses in our internal control over financial reporting. With regard to our joint venture partnerships, we initially computed the hypothetical liquidation at book value using the fair value of the assets in these joint ventures rather than the carryover basis, resulting in an adjustment to the net loss attributable to the noncontrolling interests in our 2009 consolidated financial statements. For lease pass-through arrangements, we initially characterized funds received from investors as deferred revenue rather than financing obligations, which resulted in adjustments to our 2010 consolidated financial statements. For a particular sale-leaseback transaction, we did not initially defer the correct amount of gain associated with this arrangement, which was corrected in our 2010 consolidated financial statements. The foregoing resulted in restatements of our 2008, 2009 and 2010 consolidated financial statements. In addition, deficiencies in the design and operation of our internal controls resulted in audit adjustments and delayed our financial statement close process for the years ended December 31, 2010 and 2011. We are implementing policies and processes to remediate these material weaknesses and improve our internal control over financial reporting.

We have not performed an evaluation of our internal control over financial reporting, such as required by Section 404 of the Sarbanes-Oxley Act, nor have we engaged our independent registered public accounting firm to perform an audit of our internal control over financial reporting as of any balance sheet date or for any period reported in our financial statements. Had we performed such an evaluation or had our independent registered public accounting firm performed an audit of our internal control over financial reporting, material weaknesses, in addition to those discussed above, may have been identified. For so long as we qualify as an “emerging growth company” under the JOBS Act, which may be up to five years following this offering, we will not have to provide an auditor’s attestation report on our internal controls in future annual reports on Form 10-K as otherwise required by Section 404(b) of the Sarbanes-Oxley Act. During the course of the evaluation, documentation or attestation, we or our independent registered public accounting firm may identify weaknesses and deficiencies that we may not otherwise identify in a timely manner or at all as a result of the deferred implementation of this additional level of review.

We have taken numerous steps to address the underlying causes of the control deficiencies referenced above, primarily through the development and implementation of policies, improved processes and documented procedures, and the hiring of additional accounting and finance personnel with technical accounting, inventory accounting and financial reporting experience. If we fail to remediate deficiencies in our control environment or are unable to implement and maintain effective internal control over financial reporting to meet the demands that will be placed upon us as a public company, we may be unable to accurately report our financial results, or report them within the timeframes required by law or exchange regulations.

We cannot assure you that we will be able to remediate our existing material weaknesses in a timely manner, if at all, or that in the future additional material weaknesses will not exist or otherwise be discovered, a risk that is significantly increased in light of the complexity of our business. If our efforts to remediate these material weaknesses are not successful or if other deficiencies occur, our ability to accurately and timely report our financial position, results of operations or cash flows could be impaired, which could result in late filings of our annual and quarterly reports under the Exchange Act, restatements of our consolidated financial statements, a decline in our stock price, suspension or delisting of our common stock by the NASDAQ Global Market, or other material adverse effects on our business, reputation, results of operations, financial condition or liquidity.

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Projects for our significant commercial or government customers involve concentrated project risks that may cause significant changes in our financial results.

During any given financial reporting period, we typically have ongoing significant projects for commercial and governmental customers that represent a significant portion of our potential financial results for such period. For example, Walmart is a significant customer for which we have installed a substantial number of solar energy systems. We also recently announced SolarStrong, our five-year plan to build more than $1 billion in solar energy projects for privatized U.S. military housing communities across the country that we anticipate will involve a significant investment in resources and project management over time and will require additional investment funds to support the project. These larger projects create concentrated operating and financial risks. The effect of recognizing revenue or other financial measures on the sale of a larger project, or the failure to recognize revenue or other financial measures as anticipated in a given reporting period because a project is not yet completed under applicable accounting rules by period end, may materially impact our quarterly or annual financial results. In addition, if construction, warranty or operational issues arise on a larger project, or if the timing of such projects unexpectedly shifts for other reasons, such issues could have a material impact on our financial results. If we are unable to successfully manage these significant projects in multiple markets, including our related internal processes and external construction management, or if we are unable to continue to attract such significant customers and projects in the future, our financial results would be harmed.

We depend on a limited number of suppliers of solar panels and other system components to adequately meet anticipated demand for our solar energy systems. Any shortage, delay or component price change from these suppliers could result in sales and installation delays, cancellations and loss of market share.

We purchase solar panels, inverters and other system components from a limited number of suppliers, making us susceptible to quality issues, shortages and price changes. If we fail to develop, maintain and expand our relationships with these or other suppliers, we may be unable to adequately meet anticipated demand for our solar energy systems, or we may only be able to offer our systems at higher costs or after delays. If one or more of the suppliers that we rely upon to meet anticipated demand ceases or reduces production, we may be unable to quickly identify alternate suppliers or to qualify alternative products on commercially reasonable terms, and we may be unable to satisfy this demand. In particular, there are a limited number of inverter suppliers. Once we design a system for use with a particular inverter, if that type of inverter is not readily available at an anticipated price, we may incur additional delay and expense to redesign the system. There have also been periods of industry-wide shortage of key components, including solar panels, in times of rapid industry growth. The manufacturing infrastructure for some of these components has a long lead time, requires significant capital investment and relies on the continued availability of key commodity materials, potentially resulting in an inability to meet demand for these components. Any decline in the exchange rate of the U.S. dollar compared to the functional currency of our component suppliers could increase our component prices. In addition, the U.S. government has imposed tariffs on solar panels imported from China. The average level of these tariffs on the Chinese solar panels that we purchase currently is approximately 35%, but that level has not been finalized and could increase. Because we purchase many of our solar panels from Chinese suppliers, these tariffs may increase the price of these solar panels. Any of these shortages, delays or price changes could limit our growth, cause cancellations or adversely affect our profitability, and result in loss of market share and damage to our brand.

Our operating results may fluctuate from quarter to quarter, which could make our future performance difficult to predict and could cause our operating results for a particular period to fall below expectations, resulting in a severe decline in the price of our common stock.

Our quarterly operating results are difficult to predict and may fluctuate significantly in the future. We have experienced seasonal and quarterly fluctuations in the past. However, given that we are an

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early-stage company operating in a rapidly growing industry, those fluctuations may be masked by our recent growth rates and thus may not be readily apparent from our historical operating results. As such, our past quarterly operating results may not be good indicators of future performance.

In addition to the other risks described in this “Risk Factors” section, the following factors could cause our operating results to fluctuate:

For these or other reasons, the results of any prior quarterly or annual periods should not be relied upon as indications of our future performance. In addition, our actual revenue, key operating metrics and other operating results in future quarters may fall short of the expectations of investors and financial analysts, which could have a severe adverse effect on the trading price of our common stock.

Our business benefits from the declining cost of solar panels, and our financial results would be harmed if this trend reversed or did not continue.

The declining cost of solar panels and the raw materials necessary to manufacture them has been a key driver in the pricing of our solar energy systems and customer adoption of this form of renewable energy. If solar panel and raw materials prices increase or do not continue to decline, our growth could slow and our financial results would suffer. In addition, in the past we have purchased a significant portion of the solar panels used in our solar energy systems from manufacturers based in China, some of whom benefit from favorable foreign regulatory regimes and governmental support, including subsidies. If this support were to decrease or be eliminated, or if tariffs imposed by the U.S. government were to increase the prices of these solar panels, our ability to purchase these products on competitive terms or to access specialized technologies from those countries could be restricted. Any of those events could harm our financial results by requiring us to pay higher prices or to purchase solar panels or other system components from alternative, higher-priced sources. In addition, the U.S. government has imposed tariffs on solar panels imported from China and is contemplating increasing the tariffs above current levels. These tariffs may increase the price of these solar panels, which may harm our financial results.

We act as the licensed general contractor for our customers and are subject to risks associated with construction, cost overruns, delays, regulatory compliance and other contingencies, any of which could have a material adverse effect on our business and results of operations.

We are a licensed contractor in every community we service, and we are responsible for every customer installation. For our residential projects, we are the general contractor, construction manager and installer. For our commercial projects, we are the general contractor and construction manager,

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and we typically rely on licensed subcontractors to install these commercial systems. We may be liable to customers for any damage we cause to their home or facility, belongings or property during the installation of our systems. For example, we frequently penetrate our customers’ roofs during the installation process and may incur liability for the failure to adequately weatherproof such penetrations following the completion of construction. In addition, shortages of skilled subcontractor labor for our commercial projects could significantly delay a project or otherwise increase our costs. Because our profit on a particular installation is based in part on assumptions as to the cost of such project, cost overruns, delays or other execution issues may cause us to not achieve our expected margins or cover our costs for that project.

In addition, the installation of solar energy systems and the evaluation and modification of buildings as part of our energy efficiency business is subject to oversight and regulation in accordance with national, state and local laws and ordinances relating to building codes, safety, environmental protection, utility interconnection and metering, and related matters. It is difficult and costly to track the requirements of every individual authority having jurisdiction over our installations and to design solar energy systems to comply with these varying standards. Any new government regulations or utility policies pertaining to our systems may result in significant additional expenses to us and our customers and, as a result, could cause a significant reduction in demand for our systems.

Compliance with occupational safety and health requirements and best practices can be costly, and noncompliance with such requirements may result in potentially significant monetary penalties, operational delays and adverse publicity.

The installation of solar energy systems requires our employees to work at heights with complicated and potentially dangerous electrical systems. The evaluation and modification of buildings as part of our energy efficiency business requires our employees to work in locations that may contain potentially dangerous levels of asbestos, lead or mold. We also maintain a fleet of more than 570 vehicles that our employees use in the course of their work. There is substantial risk of serious injury or death if proper safety procedures are not followed. Our operations are subject to regulation under the U.S. Occupational Safety and Health Act, or OSHA, and equivalent state laws. Changes to OSHA requirements, or stricter interpretation or enforcement of existing laws or regulations, could result in increased costs. If we fail to comply with applicable OSHA regulations, even if no work-related serious injury or death occurs, we may be subject to civil or criminal enforcement and be required to pay substantial penalties, incur significant capital expenditures, or suspend or limit operations. In the past, we have had workplace accidents and received citations from OSHA regulators for alleged safety violations, resulting in fines and operational delays for certain projects. Any such accidents, citations, violations, injuries or failure to comply with industry best practices may subject us to adverse publicity, damage our reputation and competitive position and adversely affect our business.

Problems with product quality or performance may cause us to incur warranty expenses and performance guarantee expenses, may lower the residual value of our solar energy systems and may damage our market reputation and cause our financial results to decline.

Our solar energy system warranties are lengthy. Customers who buy energy from us under leases or power purchase agreements are covered by warranties equal to the length of the term of these agreements—typically 20 years. Depending on the state where they live, customers who purchase our solar energy systems for cash are covered by a warranty up to 10 years in duration. We also make extended warranties available at an additional cost to customers who purchase our solar energy systems for cash. In addition, we provide a pass-through of the inverter and panel manufacturers’ warranties to our customers, which generally range from 5 to 25 years. One of these third-party manufacturers could cease operations and no longer honor these warranties, instead leaving us to fulfill these potential obligations to our customers. For example, Evergreen Solar, Inc.,

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one of our former solar panel suppliers, filed for bankruptcy in August 2011. Further, we provide a performance guarantee with our leased solar energy systems that compensates a customer on an annual basis if their system does not meet the electricity production guarantees set forth in their lease.

Because of the limited operating history of our solar energy systems, we have been required to make assumptions and apply judgments regarding a number of factors, including our anticipated rate of warranty claims, and the durability, performance and reliability of our solar energy systems. We have made these assumptions based on the historic performance of similar systems or on accelerated life cycle testing. Our assumptions could prove to be materially different from the actual performance of our systems, causing us to incur substantial expense to repair or replace defective solar energy systems in the future or to compensate customers for systems that do not meet their production guarantees. Product failures or operational deficiencies also would reduce our revenue from power purchase agreements because they are dependent on system production. Any widespread product failures or operating deficiencies may damage our market reputation and adversely impact our financial results.

In addition, we amortize costs of our solar energy systems over 30 years, which typically exceeds the period of the component warranties and the corresponding payment streams from our operating lease arrangements with our customers. In addition, we typically bear the cost of removing the solar energy systems at the end of the lease term. Furthermore, it is difficult to predict how future environmental regulations may affect the costs associated with the removal, disposal or recycling of our solar energy systems. Consequently, if the residual value of the systems is less than we expect at the end of the lease, after giving effect to any associated removal and redeployment costs, we may be required to accelerate all or some of the remaining unamortized expenses. This could materially impair our future operating results.

Product liability claims against us could result in adverse publicity and potentially significant monetary damages.

If one of our solar energy systems or other products injured someone we would be exposed to product liability claims. Because solar energy systems and many of our other current and anticipated products are electricity producing devices, it is possible that consumers could be injured by our products, whether by product malfunctions, defects, improper installation or other causes. We rely on our general liability insurance to cover product liability claims and have not obtained separate product liability insurance. Any product liability claim we face could be expensive to defend and divert management’s attention. The successful assertion of product liability claims against us could result in potentially significant monetary damages that could require us to make significant payments, as well as subject us to adverse publicity, damage our reputation and competitive position. Also, any product liability claims and any adverse outcomes may subject us to adverse publicity, damage our reputation and competitive position and adversely affect sales of our systems and other products.

Damage to our brand and reputation would harm our business and results of operations.

We depend significantly on our reputation for high-quality products and services, best-in-class engineering, exceptional customer service and the brand name “SolarCity” to attract new customers and grow our business. If we fail to continue to deliver our solar energy systems and our other energy products and services within the planned timelines, if our products and services do not perform as anticipated or if we damage any of our customers’ properties or cancel projects, our brand and reputation could be significantly impaired. In addition, if we fail to deliver, or fail to continue to deliver, high-quality products and services to our customers through our long-term relationships, our customers will be less likely to purchase future products and services from us, which is a key strategy to achieve our desired growth. We also depend greatly on referrals from existing customers for our growth, in addition to our other marketing efforts. Therefore, our inability to meet or exceed our current customers’ expectations would harm our reputation and growth through referrals.

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If we fail to manage our recent and future growth effectively, we may be unable to execute our business plan, maintain high levels of customer service or adequately address competitive challenges.

We have experienced significant growth in recent periods, and we intend to continue to expand our business significantly within existing markets and in a number of new locations in the future. This growth has placed, and any future growth may place, a significant strain on our management, operational and financial infrastructure. In particular, we will be required to expand, train and manage our growing employee base. Our management will also be required to maintain and expand our relationships with customers, suppliers and other third-parties and attract new customers and suppliers, as well as to manage multiple geographic locations.

In addition, our current and planned operations, personnel, systems and procedures might be inadequate to support our future growth and may require us to make additional unanticipated investment in our infrastructure. Our success and ability to further scale our business will depend, in part, on our ability to manage these changes in a cost-effective and efficient manner. If we cannot manage our growth, we may be unable to take advantage of market opportunities, execute our business strategies or respond to competitive pressures. This could also result in declines in quality or customer satisfaction, increased costs, difficulties in introducing new products and services or other operational difficulties. Any failure to effectively manage growth could adversely impact our business and reputation.

We may not be successful in leveraging our customer base to grow our business through sales of other energy products and services.

To date, we have derived substantially all of our revenue and cash receipts from the sale of solar energy systems and the sale of energy under our long-term customer agreements. We launched our energy efficiency line of products and services in mid-2010, and revenue attributable to this line of business has not been material compared to revenue attributable to our solar energy systems. Customer demand for these offerings may be more limited than we anticipate. In addition, several of our other energy products and services, including our battery storage solutions, are in the early stages of testing and development. We may not be successful in completing development of these products as a result of research and development difficulties, technical issues, availability of third-party products or other reasons. Even if we are able to offer these or other additional products and services, we may not successfully generate meaningful customer demand to make these offerings viable. If we fail to deliver these additional products and services, if the costs associated with bringing these additional products and services to market is greater than we anticipate, or if customer demand for these offerings is smaller than we anticipate, our growth will be limited.

Our growth depends in part on the success of our strategic relationships with third parties.

A key component of our growth strategy is to develop or expand our strategic relationships with third parties. For example, we are investing resources in establishing relationships with industry leaders, such as trusted retailers and commercial homebuilders, to generate new customers. Identifying partners and negotiating relationships with them requires significant time and resources. If we are unsuccessful in establishing or maintaining our relationships with these third parties, our ability to grow our business could be impaired. Even if we are able to establish these relationships, we may not be able to execute on our goal of leveraging these relationships to meaningfully expand our business and customer base. This would limit our growth potential and our opportunities to generate significant additional revenue or cash receipts.

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The loss of one or more members of our senior management or key employees may adversely affect our ability to implement our strategy.

We depend on our experienced management team, and the loss of one or more key executives could have a negative impact on our business. In particular, we are dependent on the services of our chief executive officer and co-founder, Lyndon R. Rive, and our chief operations officer, chief technology officer and co-founder, Peter J. Rive. We also depend on our ability to retain and motivate key employees and attract qualified new employees. Neither our founders nor our key employees are bound by employment agreements for any specific term, and we may be unable to replace key members of our management team and key employees in the event we lose their services. Integrating new employees into our management team could prove disruptive to our operations, require substantial resources and management attention and ultimately prove unsuccessful. An inability to attract and retain sufficient managerial personnel who have critical industry experience and relationships could limit or delay our strategic efforts, which could have a material adverse effect on our business, financial condition and results of operations.

Our business may be harmed if we fail to properly protect our intellectual property.

We believe that the success of our business depends in part on our proprietary technology, including our software, information, processes and know-how. We rely on trade secret and patent protections to secure our intellectual property rights. We cannot be certain that we have adequately protected or will be able to adequately protect our proprietary technology, that our competitors will not be able to utilize our existing technology or develop similar technology independently, that the claims allowed with respect to any patents held by us will be broad enough to protect our technology or that foreign intellectual property laws will adequately protect our intellectual property rights. Moreover, we cannot be certain that our patents provide us with a competitive advantage. Despite our precautions, it may be possible for third parties to obtain and use our intellectual property without our consent. Unauthorized use of our intellectual property by third parties, and the expenses incurred in protecting our intellectual property rights, may adversely affect our business. In the future, some of our products could be alleged to infringe existing patents or other intellectual property of third parties, and we cannot be certain that we will prevail in any intellectual property dispute. In addition, any future litigation required to enforce our patents, to protect our trade secrets or know-how or to defend us or indemnify others against claimed infringement of the rights of others could harm our business, financial condition and results of operations. See, for example, “Business—Legal Proceedings,” discussing the lawsuit that Sunpower Corporation filed against us.

The requirements of being a public company may strain our resources, divert management’s attention and affect our ability to attract and retain qualified board members and officers.

As a public company, we will be subject to the reporting requirements of the Exchange Act, the listing requirements of the NASDAQ Global Market and other applicable securities rules and regulations. Compliance with these rules and regulations will increase our legal and financial compliance costs, make some activities more difficult, time-consuming or costly and increase demand on our systems and resources. The Exchange Act requires, among other things, that we file annual, quarterly and current reports with respect to our business and operating results and maintain effective disclosure controls and procedures and internal control over financial reporting. To maintain and, if required, improve our disclosure controls and procedures and internal control over financial reporting to meet this standard, significant resources and management oversight may be required. As a result, management’s attention may be diverted from other business concerns, which could harm our business and operating results. Although we have already hired additional employees to comply with these requirements, we may need to hire more employees in the future, which will increase our costs and expenses.

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We also expect that being a public company will make it more expensive for us to obtain director and officer liability insurance, and we may be required to accept reduced coverage or incur substantially higher costs to obtain coverage. These factors could also make it more difficult for us to attract and retain qualified executive officers and members of our board of directors, particularly to serve on our audit committee and compensation committee.

The production and installation of solar energy systems depends heavily on suitable meteorological conditions. If meteorological conditions are unexpectedly unfavorable, the electricity production from our solar energy systems may be substantially below our expectations and our ability to timely deploy new systems may be adversely impacted.

The energy produced and revenue and cash receipts generated by a solar energy system depend on suitable solar and weather conditions, both of which are beyond our control. Furthermore, components of our systems, such as panels and inverters, could be damaged by severe weather, such as hailstorms or tornadoes. In these circumstances, we generally would be obligated to bear the expense of repairing the damaged solar energy systems that we own. Sustained unfavorable weather also could unexpectedly delay our installation of solar energy systems, leading to increased expenses and decreased revenue and cash receipts in the relevant periods. Weather patterns could change, making it harder to predict the average annual amount of sunlight striking each location where we install. This could make our solar energy systems less economical overall or make individual systems less economical. Any of these events or conditions could harm our business, financial condition and results of operations.

We typically bear the risk of loss and the cost of maintenance and repair on solar systems that are owned or leased by our fund investors.

We typically bear the risk of loss and are generally obligated to cover the cost of maintenance and repair on any solar systems that we sell or lease to our fund investors. At the time we sell or lease a solar system to a fund investor, we enter into a maintenance services agreement where we agree to operate and maintain the system for a fixed fee that is calculated to cover our future expected maintenance costs. If our solar systems require an above-average amount of repairs or if the cost of repairing systems were higher than our estimate, we would need to perform such repairs without additional compensation. If our solar systems, a majority of which are located in California, are damaged in the event of a natural disaster beyond our control, losses could be excluded, such as earthquake damage, or exceed insurance policy limits, and we could incur unforeseen costs that could harm our business and financial condition. We may also incur significant costs for taking other actions in preparation for, or in reaction to, such events. We purchase Property and Business Interruption insurance with industry standard coverage and limits approved by an investor’s third party insurance advisors to hedge against such risk, but such coverage may not cover our losses.

Any unauthorized disclosure or theft of personal information we gather, store and use could harm our reputation and subject us to claims or litigation.

We receive, store and use personal information of our customers, including names, addresses, e-mail addresses, credit information and other housing and energy use information. Unauthorized disclosure of such personal information, whether through breach of our systems by an unauthorized party, employee theft or misuse, or otherwise, could harm our business. If we were subject to an inadvertent disclosure of such personal information, or if a third party were to gain unauthorized access to customer personal information we possess, our operations could be seriously disrupted and we could be subject to claims or litigation arising from damages suffered by our customers. In addition, we could incur significant costs in complying with the multitude of federal, state and local laws regarding the unauthorized disclosure of personal information. Finally, any perceived or actual unauthorized

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disclosure of such information could harm our reputation, substantially impair our ability to attract and retain customers and have an adverse impact on our business.

We may have trouble refinancing our credit facilities or obtaining new financing for our working capital, equipment financing and other needs in the future or complying with the terms of existing credit facilities. If credit facilities are not available to us on acceptable terms, if and when needed, or if we are unable to comply with their terms, our ability to continue to grow our business would be adversely impacted.

We have entered into several secured credit agreements, including a $75.0 million working capital facility that matures in September 2014, a $58.5 million term loan credit facility for the purchase of inventory and working capital needs that matures in August 2013, and a $7.0 million term facility to finance the purchase of vehicles that matures in January 2015. Each facility requires us to comply with certain financial, reporting and other requirements. The timing of our commercial projects and other large projects has on occasion adversely affected our ability to satisfy certain financial covenants under these or prior facilities. While our lenders have given us waivers of certain covenants we have not satisfied in the past, there is no assurance that the lenders will waive or forbear from exercising their remedies with respect to any future defaults that might occur, which also could trigger defaults under our other credit agreements. For example, on April 30, 2012 and May 31, 2012, we did not meet a financial ratio covenant, and on June 30, 2012, we breached a financial covenant related to non-GAAP EBITDA under our prior $25.0 million working capital facility, which also resulted in a default under our $7.0 million vehicle financing facility with the same administrative bank agent. The bank waived these breaches, and in September 2012 we refinanced all amounts borrowed under the $25.0 million facility with the new $75.0 million working capital facility. We believe that the financial and other covenants are generally more favorable to us than those in the prior facility, however we cannot assure you that we will not breach these covenants in the future.

Further, there is no assurance that we will be able to enter into new credit facilities on acceptable terms. If we are unable to satisfy financial covenants and other terms under existing or new facilities or obtain associated waivers or forbearance from our lenders or if we are unable to obtain refinancing or new financings for our working capital, equipment and other needs on acceptable terms if and when needed, our business would be adversely affected.

In the long term, we intend to expand our international activities, which will subject us to a number of risks.

Our long-term strategic plans include international expansion, and we intend to sell our solar energy products and services in international markets. Risks inherent to international operations include the following:

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Doing business in foreign markets requires us to be able to respond to rapid changes in market, legal, and political conditions in these countries. The success of our business will depend, in part, on our ability to succeed in differing legal, regulatory, economic, social and political environments. We may not be able to develop and implement policies and strategies that will be effective in each location where we do business.

Risks Related to this Offering

An active, liquid and orderly trading market for our common stock may not develop, our stock price may be volatile, and you may be unable to sell your shares at or above the offering price you paid.

Prior to this offering, there has not been a public market for our common stock. We cannot predict the extent to which a trading market will develop or how liquid that market might become. The initial public offering price for our common stock will be determined by negotiations between us and representatives of the underwriters and may not be indicative of prices that will prevail in the trading market after the offering closes. The market price of our common stock could be subject to wide fluctuations in response to many risk factors listed in this section and others beyond our control, including:

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Further, the stock markets have experienced extreme price and volume fluctuations that have affected and continue to affect the market prices of equity securities of many companies. These fluctuations often have been unrelated or disproportionate to the operating performance of those companies. In addition, the stock prices of many renewable energy companies have experienced wide fluctuations that have often been unrelated to the operating performance of those companies. These broad market and industry fluctuations, as well as general economic, political and market conditions such as recessions, interest rate changes or international currency fluctuations, may cause the market price of our common stock to decline. If the market price of our common stock after this offering does not exceed the initial public offering price, you may not realize any return on your investment and may lose some or all of your investment.

In the past, companies that have experienced volatility in the market price of their stock have been subject to securities class action litigation. We may be the target of this type of litigation in the future. Securities litigation against us could result in substantial costs and divert our management’s attention from other business concerns, which could seriously harm our business.

As an emerging growth company within the meaning of the Securities Act, we will utilize certain modified disclosure requirements, and we cannot be certain if these reduced requirements will make our common stock less attractive to investors.

We are an emerging growth company within the meaning of the rules under the Securities Act. We have in this prospectus utilized, and we plan in future filings with the SEC to continue to utilize, the modified disclosure requirements available to emerging growth companies, including reduced disclosure about our executive compensation and omission of compensation discussion and analysis, and an exemption from the requirement of holding a nonbinding advisory vote on executive compensation. In addition, we will not be subject to certain requirements of Section 404 of the Sarbanes-Oxley Act, including the additional testing of our internal control over financial reporting as may occur when outside auditors attest as to our internal control over financial reporting, and we have elected to delay adoption of new or revised accounting standards applicable to public companies. As a result, our stockholders may not have access to certain information they may deem important.

In addition, Section 107 of the JOBS Act also provides that an emerging growth company can utilize the extended transition period provided in Section 7(a)(2)(B) of the Securities Act for complying with new or revised accounting standards. Thus, an emerging growth company can delay the adoption of certain accounting standards until those standards would otherwise apply to private companies. We have elected to utilize this extended transition period. Our financial statements may therefore not be comparable to those of companies that comply with such new or revised accounting standards as they become applicable to public companies. We cannot predict if investors will find our common stock less attractive because we will rely on these exemptions. If some investors find our common stock less attractive as a result, there may be a less active trading market for our common stock and our stock price may be more volatile.

We could remain an ‘‘emerging growth company’’ for up to five years, or until the earliest of (i) the last day of the first fiscal year in which our annual gross revenue exceed $1 billion, (ii) the date that we become a ‘‘large accelerated filer’’ as defined in Rule 12b-2 under the Exchange Act, which would occur if the market value of our common stock that is held by non-affiliates exceeds $700 million as of the last business day of our most recently completed second fiscal quarter or (iii) the date on which we have issued more than $1 billion in non-convertible debt during the preceding three-year period.

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Our stock price could decline due to the large number of outstanding shares of our common stock eligible for future sale.

Sales of substantial amounts of our common stock in the public market following this offering, or the perception that these sales could occur, could cause the market price of our common stock to decline. These sales could also make it more difficult for us to sell equity or equity-related securities in the future at a time and price that we deem appropriate.

Upon completion of this offering, we will have              outstanding shares of common stock based on the number of shares outstanding as of August 31, 2012 and assuming no exercise of the underwriters’ over-allotment option and no exercise of outstanding options after August 31, 2012. The              shares sold pursuant to this offering will be immediately tradable without restriction. Of the remaining shares:

We and all of our directors and officers, as well as the selling stockholders, have agreed that we and they will not, without the prior written consent of Goldman, Sachs & Co., Credit Suisse Securities (USA) LLC and Merrill Lynch, Pierce, Fenner & Smith Incorporated on behalf of the underwriters, during the period ending 180 days after the date of this prospectus:

whether any transaction described above is to be settled by delivery of shares of our common stock or such other securities, in cash or otherwise. This agreement is subject to certain limited exceptions and extensions described in the section entitled “Underwriting.”

Goldman, Sachs & Co., Credit Suisse Securities (USA) LLC and Merrill Lynch, Pierce, Fenner & Smith Incorporated on behalf of the underwriters may, in their sole discretion and at any time, release all or any portion of the securities subject to lock-up agreement. After the closing of this offering, we intend to register approximately              shares of common stock that have been reserved for future issuance under our stock incentive plans.

Insiders will continue to have substantial control over us after this offering, which could limit your ability to influence the outcome of key transactions, including a change of control.

Our directors, executive officers and each of our stockholders who own greater than 5% of our outstanding common stock and their affiliates, in the aggregate, will beneficially own approximately     % of the outstanding shares of our common stock after this offering. As a result, these stockholders, if acting together, would be able to influence or control matters requiring approval by our stockholders, including the election of directors and the approval of mergers, acquisitions or other extraordinary transactions. They may have interests that differ from yours and may vote in a way with which you disagree and that may be adverse to your interests. This concentration of ownership may have the effect of delaying, preventing or deterring a change of control of our company, could deprive our

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stockholders of an opportunity to receive a premium for their common stock as part of a sale of our company and might affect the market price of our common stock.

Our management will have broad discretion over the use of the proceeds from this offering and may not apply the proceeds of this offering in ways that increase the value of your investment.

Our management will have broad discretion to use the net proceeds we receive from this offering and you will be relying on its judgment regarding the application of these proceeds. We expect to use the net proceeds from this offering as described under the heading “Use of Proceeds.” However, management may not apply the net proceeds of this offering in ways that increase the value of your investment.

If you purchase shares of our common stock in this offering, you will experience substantial and immediate dilution.

If you purchase shares of our common stock in this offering, you will experience substantial and immediate dilution of $         per share based on an assumed initial public offering price of $         per share, the mid-point of the price range on the cover of this prospectus, because the price that you pay will be substantially greater than the net tangible book value per share of the common stock that you acquire. This dilution is due in large part because our earlier investors paid substantially less than the initial public offering price when they purchased their shares of our capital stock. You will experience additional dilution upon the exercise of options to purchase common stock under our equity incentive plans, if we issue restricted stock to our employees under these plans or if we otherwise issue additional shares of our common stock. See “Dilution.”

Provisions in our certificate of incorporation and bylaws and under Delaware law might discourage, delay or prevent a change of control of our company or changes in our management and, therefore, depress the trading price of our common stock.

Our certificate of incorporation and bylaws contain provisions that could depress the trading price of our common stock by discouraging, delaying or preventing a change of control of our company or changes in our management that the stockholders of our company may believe advantageous. These provisions include:

If securities or industry analysts do not publish or cease publishing research or reports about us, our business or our market, or if they change their recommendations regarding our stock adversely, our stock price and trading volume could decline.

The trading market for our common stock will be influenced by the research and reports that industry or securities analysts may publish about us, our business, our market or our competitors. If

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any of the analysts who may cover us change their recommendation regarding our stock adversely, or provide more favorable relative recommendations about our competitors, our stock price would likely decline. If any analyst who may cover us were to cease coverage of our company or fail to regularly publish reports on us, we could lose visibility in the financial markets, which in turn could cause our stock price or trading volume to decline.

Because we do not expect to pay any dividends for the foreseeable future, investors in this offering may be forced to sell their stock to realize a return on their investment.

We do not anticipate that we will pay any dividends to holders of our common stock for the foreseeable future. Any payment of cash dividends will be at the discretion of our board of directors and will depend on our financial condition, capital requirements, legal requirements, earnings and other factors. Our ability to pay dividends might be restricted by the terms of any indebtedness that we incur in the future. Consequently, you should not rely on dividends to receive a return on your investment. See “Dividend Policy.”

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