Certifications & Affiliations
Certified B Corporation
B Corps use business as a force for good™.
At OnSite Energy, we’re more than a solar company - we’re a Certified B Corporation (B Corp) committed to using business as a force for good. Our team installs high-quality solar panels while actively advocating for renewable energy, reducing carbon emissions, and promoting sustainability across Montana.
Becoming a B Corp strengthens our accountability and demonstrates our dedication to creating a positive impact for people, communities, and the planet. B Corps meet rigorous social and environmental standards, verified through independent third-party certification. The process helps businesses measure, improve, and maintain their impact, with re-certification required every three years.
With over 5,000 B Corps in 79 countries, Montana is home to 9 Certified B Corps, and we are proud to be one of them.
📢 See our B Corp profile and impact report.
📖 Learn more about B Corps.
Amicus Solar Cooperative
OnSite Energy is a proud member-owner of the Amicus Solar Cooperative.
Amicus Solar is a nationwide cooperative of independent solar PV installers who collaborate to share best practices, improve efficiency, leverage group purchasing power, and access financing solutions.
With over 50 member-owners installing solar in all 50 U.S. states, D.C., Puerto Rico, and Canada, Amicus fosters a strong network of industry leaders—many of whom, like us, are B Corps committed to social and environmental impact.
As a member, we offer competitive pricing and benefit from the expertise and logistical support of some of the most experienced solar contractors in the country. This model allows smaller, independent companies like OnSite Energy to remain competitive in an industry increasingly dominated by large corporations.
Top Solar Contractor
OnSite Energy has been recognized among the nation’s Top Solar Contractors eight times.
Each year, Solar Power World recognizes leading solar companies across the United States based on the amount of solar capacity they install. OnSite Energy has earned a place on this national list eight times since 2018—a track record that reflects years of consistent work serving Montana homes and businesses.
In 2026, OnSite ranked #291 among solar contractors nationwide, competing alongside companies working in markets many times the size of Montana. The recognition is especially meaningful to us because we’ve remained an independent Montana company, with teams based in Bozeman and Missoula.
For our customers, eight appearances on the list represent something simple: proven experience, year after year. Since 2012, we’ve built our reputation one Montana solar project at a time, while continuing to compete at a national level.
Solar for Conservation
Harnessing solar energy to support Montana’s wild places.
At OnSite Energy, we believe in protecting Montana’s public lands, wildlife, and wilderness. That’s why we created Solar for Conservation—a program that gives back to local conservation nonprofits when you choose to go solar.
By installing solar with us, you’re not just reducing your carbon footprint and energy costs—you’re directly supporting organizations working to preserve Montana’s natural landscapes for future generations.
Through this initiative, we partner with Montana-based conservation nonprofits, providing funding and resources to help them continue their important work.
Nonprofits we currently support:
- Backcountry Hunters & Anglers
- Five Valleys Land Trust
- Gallatin Valley Land Trust
- Greater Yellowstone Coalition
- Montana Land Reliance
- Montana Trout Unlimited
- Montana Wildlife Federation
- Northern Plains Resource Council
- Public Land and Water Access Association
- Wild Montana
🌎 You go solar. OnSite gives back. Everyone wins.
Montana Renewable Energy Association
A Montana where the widespread use of renewable energy
drives Montana’s economy and powers every aspect of Montanans’ lives.
The Montana Renewable Energy Association is a membership based 501(c)(3) nonprofit organization founded in 2000. We are businesses, individuals, families, and advocates dedicated to expanding Montana’s use of renewable energy in order to conserve natural resources, create jobs, and increase the independence and resilience of our communities.
