Corporations ‘walking the walk’ with clean energy as US C&I solar capacity soars

October 7, 2020
Facebook
Twitter
LinkedIn
Reddit
Email
Apple’s headquarters in Silicon Valley is powered by 100% renewable energy and features a 17MW rooftop solar installation. Image: Apple.

Led by tech firms and retailers, corporations installed 1,286MW of new solar capacity in the US in 2019, the second highest amount on record, a new report from the Solar Energy Industries Association (SEIA) has revealed.

Over 8,350MW of commercial solar capacity has now been developed across more than 38,000 US systems. Topping the list are Apple and Amazon, followed by Walmart, which installed the most solar among corporations in 2019 and increased its use by 35%. Last year also saw more onsite commercial solar installed than ever before, reaching 845MW.

This article requires Premium SubscriptionBasic (FREE) Subscription

Try Premium for just $1

  • Full premium access for the first month at only $1
  • Converts to an annual rate after 30 days unless cancelled
  • Cancel anytime during the trial period

Premium Benefits

  • Expert industry analysis and interviews
  • Digital access to PV Tech Power journal
  • Exclusive event discounts

Or get the full Premium subscription right away

Or continue reading this article for free

SEIA says the rapid decline in the price of solar PV has been the primary driver of recent commercial solar expansion, while the proliferation of renewable energy goals among the world’s largest companies has also increased the technology's uptake.

Apple, which hit its 100% renewable energy goal in 2018 and recently pledged to make its supply chain carbon neutral by 2030, now has nearly 400MW of solar capacity in its portfolio.

The full top ten corporate solar users in the US includes: Apple, Amazon, Walmart, Target, Google, Kaiser Permanente, Switch, Prologis, Facebook and Solvay.

“The world’s most recognisable brands are walking the walk when it comes to their clean energy commitments,” Abigail Ross Hopper, CEO at SEIA, said. “Businesses are choosing solar energy because it can significantly curb their energy costs and add predictability during these uncertain times.”

California, New York and Massachusetts lead the US for commercial solar installations. Image: SEIA.

SEIA forecasts that the corporate sector will continue to invest in solar as companies follow through on clean energy commitments. Over the next few years, an additional 5GW of corporate off-site solar projects are slated to come online, more than doubling the current installed capacity.

Facebook, one of the biggest buyers of off-site solar, has made its debut in the top ten and has taken the biggest leap forward, jumping from 27th to ninth on SEIA's list. Target, the company with the most solar capacity installed at its facilities, finished 2019 with a total of 283MW of solar capacity and more than 500 solar projects in its portfolio.

The report notes that California continues to lead the US for commercial solar due to a supportive policy environment and excellent solar resources, resulting in a diverse mix of smaller on-site and larger off-site projects. High building density and green policies mean New Jersey, New York and Massachusetts are also among the top states.

16 June 2026
Napa, USA
PV Tech has been running PV ModuleTech Conferences since 2017. PV ModuleTech USA, on 16-17 June 2026, will be our fifth PV ModulelTech conference dedicated to the U.S. utility scale solar sector. The event will gather the key stakeholders from solar developers, solar asset owners and investors, PV manufacturing, policy-making and and all interested downstream channels and third-party entities. The goal is simple: to map out the PV module supply channels to the U.S. out to 2027 and beyond.

Read Next

December 22, 2025
Emmvee, through its subsidiary Emmvee Energy, has begun operations at its 2.5GW solar module manufacturing plant in Bengaluru, Karnataka.
Premium
December 22, 2025
Tracker producer Nextracker has rebranded as Nextpower to reflect the wider portfolio of products and services it now offers.
December 22, 2025
Altus Power has acquired a 234MW solar portfolio from independent power producer Greenbacker. 
December 19, 2025
The US House of Representatives has passed a permitting reform bill reducing the environmental scrutiny on large energy projects.
December 17, 2025
T1 Energy has started construction on the 2.1GW first phase of its TOPCon cell manufacturing facility in Texas.
December 17, 2025
Doral Renewables has signed a PPA to sell power generated at its 270MW Lambs Draw solar PV project, which will be built in Kansas.

Upcoming Events

Solar Media Events
February 3, 2026
London, UK
Solar Media Events
March 24, 2026
Dallas, Texas
Solar Media Events
April 15, 2026
Milan, Italy
Solar Media Events
June 16, 2026
Napa, USA
Solar Media Events
November 24, 2026
Warsaw, Poland