Clean Energy to Inspire

Core Development Group is a nationally ranked, independent, trusted, and agile U.S. company committed to building a new renewable energy era with our partners and customers.

With our customers and partners, we’re working to transition the U.S. economy to a new and better renewable energy era.


We transition businesses to a better bottom line with clean energy projects that deliver value financially, inspirationally, and environmentally.

Customers and partners trust us because we have earned a strong reputation for operational excellence through hard work, skill, careful process and active listening.

Our performance for customers is fueled by deep industry relationships and connections, and the vision and energy of our team.

Nationally Recognized Leader

Core Development Group is a proven leader of the U.S. solar industry, as ranked by Solar Power World (2022 Rankings).

  • One of the Top 29 Solar EPC Firms in the U.S.
  • Top 20% of Solar Contractors in the U.S.
  • Top 18 Commercial Contractors in the U.S.
  • Ranked as the 17th Leading California Solar Contractor
  • Ranked as the 32nd Leading New York Solar Contractor
  • Ranked as the 21st Leading New Jersey Solar Contractor
Top solar contractor

MW Peak

Environmental Excellence

As a result of our work in partnership with our clients, we’ve avoided 665,595 metric tons of CO2 Emissions – equivalent to burning 300,000 metric tons of coal

This figure is equivalent to preventing:

CO-2 Emissions From

Barrels of gasoline

Greenhouse gas emissions from

Passenger vehicles driven for a year

Carbon Emissions From

Barrels of oil

Working with Industry for the Good of Customers and the Planet

“Core Development Group remains one of our most trusted and dedicated partners.”
- Sustainable Energy Provider

Let us help you transition to the renewable era.