About the

Our mission

"Choose wisely. It's a small planet.®" That's how it all started back in 1997 when a crew of like-minded folks in Vermont set out on a mission: to inspire hope and motivate action through the use of clean energy. Over 20 years later, we’re proud to be a carbon-neutral company that continues to keep sustainability at the heart of everything we do. Join us as we help make the planet a cleaner, greener place to be.

Our business

As the longest-serving renewable energy retailer, we’re proud to bring you 100% clean energy solutions, backed by the purchase of renewable energy certificates (RECs), for homes, small businesses and anyone else looking to get involved with sustainability efforts.

Our impact

Thanks to customer demand, we're able to support sustainable projects in the markets we serve. Our products are sourced from high-quality projects and undergo a voluntary third-party audit annually.


Wind farms

Solar farms

Switching to clean electricity has a big impact. Check out just how powerful wind and solar energy can be.

Our history

1997 Happy birthday to us! Green Mountain Energy started in Vermont and began serving customers in California.
1999 Thanks to our stellar customers, we helped build the first utility-scale wind farm in Pennsylvania.
2002 We were the first energy company dedicated to clean energy in Texas. We also founded the Green Mountain Energy Sun Club to help make a difference for people and our planet.
2004 Suits and briefcases? Yes, please. We began selling clean energy to business customers.
2009 We love NY. In fact, we were the first energy company committed to clean energy in New York City.
2011 The Empire State Building became our customer and New York City’s largest commercial purchaser of 100% clean energy at the time.
2013 It’s all about sparking positive change. We launched the SolarSPARC® program, the first 100% solar plan in Texas.
2019 We’ve come a long way. We’re happy to be the longest-serving renewable energy retailer, with over half a million customers in Texas, New York, New Jersey, Illinois, Pennsylvania, Massachusetts and Maryland. And we’re just getting started.


Being green is part of who we are and what we do.

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Eco tips, environmental insights and more.

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Learn how we're changing the way power is made.

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Join the team

Become a part of our clean energy crew.

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Green Mountain Energy Sun Club

Since 2002, Sun Club has empowered local communities with sustainability solutions. Through nonprofit partnerships and sustainability grants, Sun Club delivers projects promoting renewable energy, energy efficiency, resource conservation and environmental stewardship.

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Make a commitment and join our mission to change the way power is made.
Choose 100% clean electricity from Green Mountain.