Onyx is a vertically integrated clean energy asset developer, owner and operator which provides customized solutions to accelerate the decarbonization of our environment.


Onyx is a leading U.S. renewable energy company with a proven track record of developing contracted solar and energy storage projects

  • Integrated platform delivers strong capabilities in development, EPC, M&A, and asset management
  • Successful track record of developing renewable projects of any scope, size and geography across the U.S. in many sectors, including C&I, utility-scale and community solar
  • Onyx partners with a variety of clients and has extensive experience developing solutions for municipalities, schools, corporations, military, utility and non-profit clients
  • Co-owned by funds managed by The Blackstone Group and Sustainable Development Capital LLP (“SDCL”)

Experienced Developer

Members of the Onyx team have developed more than 11 GW of renewable energy projects across the U.S. and have over 275 years of collective industry experience

  • As of January 2022, Onyx operates over 175 MW of solar assets
  • Longstanding relationships with clients, operators, EPC contractors, asset managers, and financial institutions

In-House Expertise

The Onyx team is comprised of in-house staff dedicated to each component of the development cycle

Financing and Contracting
  • Access to reliable capital allows for a seamless installation process with high quality standards and close attention to detail
  • Extensive experience in contracting large volumes of simultaneous contracts
Development and Engineering
  • In-house development, procurement, and engineering capabilities
  • Management and oversight of trusted third-party EPC contractors and subcontractors
  • In-house project managers oversee all projects and are on-site during construction
Asset Management
  • Systems are remotely monitored by Onyx personnel, and live data is transmitted to Onyx’s asset management portal
  • Regional O&M providers provide local boots on the ground

Client Mix by MW