July 21, 2025 Vacaville, CA - Citadel Roofing & Solar is proud to announce its significant climb in the 2025 Solar Power World Top Solar Contractors rankings, underscoring the company’s continued leadership and innovation in residential and commercial solar energy and storage solutions.
This year, Citadel rose in nearly every category, most notably:
- #3 Solar Installer in the Nation(up from #10 in 2024)
- #2 Residential Solar Installer in California(up from #8 in 2024)
- #1 Residential & Commercial Installer in California(maintaining the top position)
“We’re honored to be recognized again by Solar Power World,” said Dieter Folk, President & Owner at Citadel Roofing & Solar. “These rankings are a reflection of the trust our customers place in us, the talent of our team, and our commitment to building a cleaner energy future across California.”
The Top Solar Contractors List is the most recognized annual listing of solar contractors in the United States. Compiled by Solar Power World, it celebrates the critical work of solar installers in supporting local energy and decarbonizing the grid. Companies are ranked by 2024 installation volume and grouped by service, market, and location.
Despite a challenging policy environment, the solar industry had a record-breaking year in 2024, adding nearly 50 GW of new capacity, more than any other energy technology in over two decades. Solar and storage projects accounted for 84% of all new electric generating capacity added to the U.S. grid.
“At a time when the federal government is doing everything it can to cut solar power down, the gigawatts put up by our 2025 Top Solar Contractors emphasize just how crucial it is to our nation’s energy mix,” said Kelsey Misbrener, Managing Editor of Solar Power World. “From the smallest residential projects to the largest utility-scale solar farms, these installations are keeping the lights on and keeping power affordable.”
Citadel Roofing & Solar employs more than 1000 workers and installed over 39 MW of solar in 2024. Since its founding in 2015, Citadel has installed more than 146 MW of solar energy across California. With a management team with decades of experience in the solar industry and a full-service approach, Citadel delivers custom solar, storage, and roofing solutions to homeowners, builders, and businesses statewide. Its strong showing on the 2025 list reaffirms its position as one of the most trusted and fastest-growing solar contractors in the country.
About Solar Power World
Solar Power World is the leading online and print resource for news and information regarding solar installation, development and technology. Since 2011, SPW has helped U.S. solar contractors, including installers, developers and EPCs in all markets, grow their businesses and do their jobs better.
Media Contacts
Citadel Roofing & Solar
Alma Kullenstein, Marketing Manager
akullenstein@citadelrs.com
Solar Power World
Kelly Pickerel, editor-in-chief
kpickere@wtwhmedia.com
