Sunrun

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A United States residential solar and battery-storage provider built around long-term solar-as-a-service contracts.

Last updated August 21, 2026

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Overview

Sunrun is an American residential clean-energy company that designs, sells, installs, owns, and maintains photovoltaic systems and home battery-storage equipment. It was founded in 2007 by Lynn Jurich, Ed Fenster, and Nat Kreamer and helped popularize a solar-as-a-service model in which the provider finances and retains ownership of rooftop equipment while the homeowner makes long-term contractual payments for the electricity produced. This structure reduced or eliminated the large upfront purchase cost that had traditionally limited residential solar adoption. The company’s core offerings have included solar leases, power-purchase agreements, customer-owned solar installations, and battery systems. Its BrightBox product was introduced in Hawaii in 2015 and expanded to California in 2016. Battery storage allows customers to retain solar power for later use and can provide backup electricity during grid outages, making resilience and energy independence important parts of Sunrun’s consumer proposition. The company has also marketed monitoring, maintenance, installation, and energy-management services associated with its systems. Sunrun expanded through both financing and acquisitions. It raised venture and project-finance capital during its early years, acquired the residential division of REC Solar, AEE Solar, and SnapNrack in 2014, and became a public company on Nasdaq in 2015 under the ticker RUN. In 2020 it acquired Vivint Solar in an approximately $3.2 billion transaction, creating one of the largest dedicated residential solar platforms in the United States. The Vivint transaction broadened Sunrun’s customer base and operating footprint but also produced a substantial goodwill balance; in 2023 Sunrun recorded a $1.2 billion non-cash impairment related to that acquisition. Sunrun operates in the United States and competes in a market shaped by federal tax incentives, state-level solar policies, utility interconnection rules, interest rates, equipment costs, and consumer-finance conditions. Its business model depends on long-lived customer contracts and project financing, so customer acquisition, cancellations, installation execution, system performance, and access to capital are material operating considerations. The company has faced regulatory scrutiny and litigation concerning sales practices, contract disclosures, customer cancellations, and reported subscriber metrics. Sunrun has disputed allegations that its subscriber reporting improperly inflated tax-credit claims and has stated that some comparisons used by critics did not distinguish between systems that were operational and systems that were not yet active or billing. Sunrun’s present brand positioning centers on accessible residential solar, battery backup, lower dependence on conventional grid electricity, and household energy resilience. Its principal customer relationship is not limited to hardware sales: depending on the contract, Sunrun may remain responsible for financing, monitoring, maintenance, repairs, and system performance over an extended period. This service-oriented model differentiates the company from installers that primarily sell equipment directly to homeowners, while exposing Sunrun to long-term contractual, operational, regulatory, and financing risks.

History

Sunrun was established in January 2007 by Lynn Jurich, Ed Fenster, and Nat Kreamer. Jurich and Fenster had met at Stanford Graduate School of Business. Rather than treating residential solar solely as a conventional equipment sale, the company introduced a solar-as-a-service approach. Sunrun could own and maintain rooftop systems while customers paid for the electricity generated under long-term agreements. The model addressed the high upfront cost of residential solar and made financing, installation, monitoring, and maintenance part of the customer proposition. The company raised early venture and project-finance capital to support deployment. It obtained $12 million in venture funding in 2008, followed by an $18 million Series B round led by Accel Partners in 2009. In the same period, U.S. Bancorp provided substantial project-financing and tax-equity commitments. Sunrun also entered into a major financing arrangement with PG&E in 2010 and raised additional capital from Sequoia Capital. By 2014, it had raised a further $150 million and was expanding beyond its original operating capabilities. In 2014, Sunrun acquired the residential division of REC Solar, wholesale distributor AEE Solar, and racking-hardware manufacturer SnapNrack from Mainstream Energy Corporation. These transactions broadened its installation, distribution, and equipment capabilities. In 2015, Sunrun completed an initial public offering on Nasdaq at $14 per share, receiving the ticker RUN. The company also introduced BrightBox battery storage in Hawaii in 2015 and expanded the product to California in 2016, reflecting a strategic move from electricity generation alone toward backup power and household energy resilience. Sunrun encountered significant scrutiny after its listing. In 2017, reporting disclosed an SEC subpoena and investigation concerning the company’s treatment and disclosure of customer cancellations. Former sales managers alleged that cancellation processing had been delayed and that cancellation dates had been altered in the company’s systems before the IPO. The allegations led to federal securities class actions and a related shareholder case in California. Separately, documents later released under the Freedom of Information Act indicated that the FBI had opened a corporate-fraud investigation in 2017 at the request of the Department of Justice following a referral by the U.S. Attorney’s Office for the Northern District of California. The company pursued further consolidation in 2020 by acquiring Vivint Solar for approximately $3.2 billion. The deal made Sunrun a substantially larger residential solar platform, combining customer bases, installation operations, financing arrangements, and market presence. The acquisition also left Sunrun with considerable goodwill. In 2023, the company recorded a $1.2 billion non-cash impairment charge connected with Vivint Solar, reducing the carrying value of that goodwill from approximately $4.3 billion to $3.1 billion. In October 2023, Muddy Waters Research published a short-seller report alleging that Sunrun had materially overstated non-GAAP subscriber numbers and had claimed or sold tax credits using inflated counts. The report estimated potential excess investment tax credits of about $200 million for 2022. Sunrun rejected the allegations, arguing that the Energy Information Administration data used by the short seller were not directly comparable because they excluded systems that were not yet operational or in active billing. A securities investigation was subsequently announced by Glancy Prongay & Murray on behalf of Sunrun investors. Regulatory and consumer-protection scrutiny continued in the mid-2020s. In July 2024, Connecticut Attorney General William Tong filed a lawsuit alleging deceptive and unlawful sales practices by Sunrun and associated companies and sales personnel. The allegations included forged customer signatures, impersonation during confirmation calls, unpermitted installations, non-functional systems, and undisclosed price-escalation clauses. The case remained pending as of March 2026. Separately, Massachusetts consumer-advocacy records were reported to contain at least 170 complaints concerning Sunrun from 2023 through 2025. In April 2026, the Texas attorney general issued civil investigative demands to Sunrun and other installers over possible misrepresentations concerning bill savings, system performance, equipment, installation, and contract terms. Sunrun remains an active United States residential solar and storage company. Its long-term service-contract model, distributed generation systems, battery products, and financing capabilities continue to define the brand, while its performance is affected by policy incentives, interest rates, installation execution, cancellation rates, customer satisfaction, grid rules, and regulatory oversight.

2024
Connecticut consumer-protection lawsuit
[1]Sunrunen.wikipedia.org
The Connecticut attorney general files a lawsuit alleging deceptive sales and installation practices.
2023
Goodwill impairment
[1]Sunrunen.wikipedia.org
Sunrun records a $1.2 billion non-cash goodwill impairment related to the Vivint Solar acquisition.
2020
Vivint Solar acquisition
[1]Sunrunen.wikipedia.org
Sunrun acquires Vivint Solar in an approximately $3.2 billion transaction.
2016
BrightBox expands to California
[1]Sunrunen.wikipedia.org
The company expands its residential battery-storage offering from Hawaii into California.
2015
Nasdaq listing and BrightBox launch
[1]Sunrunen.wikipedia.org
Sunrun completes its IPO and launches BrightBox battery storage in Hawaii.
2014
Expansion through acquisitions
[1]Sunrunen.wikipedia.org
Sunrun acquires the residential division of REC Solar, AEE Solar, and SnapNrack.
2010
PG&E financing arrangement
[1]Sunrunen.wikipedia.org
Sunrun enters a major arrangement with PG&E and announces additional capital from Sequoia Capital.
2008
Early venture and project financing
[1]Sunrunen.wikipedia.org
Sunrun raises venture capital and obtains project financing to support residential solar deployment.
2007
Sunrun is founded
[1]Sunrunen.wikipedia.org
Lynn Jurich, Ed Fenster, and Nat Kreamer establish Sunrun in January and develop a solar-as-a-service model for residential customers.

Products and positioning

A residential clean-energy provider emphasizing affordable access to solar, long-term service, backup power, and household energy independence.

Solar power · 2007
Residential photovoltaic systems
Sunrun designs and installs rooftop photovoltaic systems for homeowners. Depending on the agreement, the customer may purchase the system or obtain service through a lease or power-purchase arrangement. Sunrun’s service role can include system monitoring, maintenance, repairs, and management of the long-term customer relationship.
Energy services · 2007
Solar-as-a-service contracts
These contracts allow residential customers to use electricity generated by a solar system without paying the full equipment cost upfront. Sunrun may own and maintain the equipment while the customer makes scheduled payments or pays for generated electricity over a long term.
Battery energy storage · 2015
BrightBox
BrightBox is Sunrun’s residential battery-storage offering. It stores electricity for later use and can support backup power during outages. The product was introduced in Hawaii in 2015 and expanded to California in 2016 as Sunrun broadened its proposition from solar generation to household resilience.

Controversies

2026
Texas deceptive-trade-practices inquiry
Texas issued civil investigative demands to Sunrun and other installers in an inquiry into representations about savings, system efficacy, equipment, installation, and contract terms.
Source
2024
Connecticut deceptive-sales lawsuit
The Connecticut attorney general alleged forged signatures, impersonated confirmation calls, unpermitted installations, non-functional systems, and undisclosed price escalators in certain solar contracts.
Source
2023
Muddy Waters subscriber-count allegations
Muddy Waters alleged that Sunrun overstated non-GAAP subscriber numbers and potentially used inflated counts in connection with investment tax credits. Sunrun denied the allegations and disputed the comparability of the underlying data.
Source
2018
Reported FBI corporate-fraud investigation
FOIA-released documents indicated that the FBI had opened a corporate-fraud investigation into Sunrun in 2017 following a Justice Department-related referral.
Source
2017
Customer-cancellation disclosure controversy
Sunrun faced SEC scrutiny, media allegations, and shareholder litigation concerning whether residential customer cancellations were processed and disclosed accurately before and around the company’s IPO.
Source

2020
Acquire Vivint SolarM&A
Background
Residential solar remained fragmented, and scale could improve customer acquisition, installation, financing, and service capabilities.
Action taken
Sunrun acquired Vivint Solar in a transaction valued at approximately $3.2 billion.
Aftermath
The transaction created a substantially larger residential solar platform but later contributed to a significant goodwill impairment.
Transaction value. Approximately US$3.2 billion (2020)
Source
2015
Launch BrightBox battery storageProduct launch
Background
Solar customers increasingly sought backup power and the ability to use stored electricity when solar generation was unavailable.
Action taken
Sunrun introduced BrightBox in Hawaii and later expanded it to California.
Aftermath
Battery storage became an important extension of Sunrun’s residential solar and energy-resilience proposition.
Source
2014
Acquire REC Solar residential operations, AEE Solar, and SnapNrackM&A
Background
Sunrun sought greater control over residential installation, distribution, and equipment capabilities.
Action taken
The company acquired three businesses or business units from Mainstream Energy Corporation.
Aftermath
The acquisitions broadened Sunrun’s operating and supply-chain capabilities.
Source
2007
Adopt a solar-as-a-service modelStrategy
Background
Residential solar systems traditionally required substantial upfront customer expenditure.
Action taken
Sunrun retained ownership and maintenance responsibility for equipment in many arrangements while customers paid for solar electricity through long-term contracts.
Aftermath
The model became a central feature of Sunrun’s brand and helped make third-party-owned residential solar more accessible.
Source

Recent events

2023
Sunrun records goodwill impairment related to Vivint Solar[1]Sunrunen.wikipedia.org
Other
The company recorded a $1.2 billion non-cash goodwill impairment associated with the Vivint Solar acquisition.
2020
Sunrun completes Vivint Solar acquisition[1]Sunrunen.wikipedia.org
M&A
Sunrun acquired Vivint Solar in a transaction valued at approximately $3.2 billion, expanding its residential solar platform.
2015
Sunrun goes public on Nasdaq[1]Sunrunen.wikipedia.org
Other
Sunrun completed its initial public offering at $14 per share and began trading on Nasdaq under the symbol RUN.

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