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Altus Power

Altus Power

Stamford, CT
Year Founded: 2009
Total Kilowatts Installed Since Founded: 1,062,709

Rank: 63

Altus Power, based in Stamford, Conn., is a leading commercial-scale solar company operating in 25 states with 500 projects and 1GW in operating assets. It serves 35,000 Community Solar subscribers, providing clean energy savings through utility bill discounts without requiring solar panel installation. Altus Power’s portfolio helps enterprises achieve carbon reduction goals. As a leading provider of clean electric power, Altus Power offers end-to-end solutions, generating power near consumption sites to reduce transmission needs. It originates, develops, owns, and operates solar generation, energy storage and charging infrastructure across the nation.

2025
Rank #63  ·  2025 List  ·  2024 Installation Data
C&I | CS · Developer
73,257
2024 Installation Data
View 2024 Installation Data by State
Maine 48,171
New Jersey 21,165
New York 3,159
Illinois 760
View 2025 contractor list →
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  • Home
  • Top Solar Contractors
  • Articles
    • Most Recent Posts
    • News
      • Latest News Items
      • SPW State News Hub
      • IRA/OBBBA coverage
      • Solar tariffs
      • U.S. manufacturing updates
    • Featured
      • Latest Feature Stories
      • Benchmarking U.S. Solar Manufacturing
      • SPW’s Rising Stars
      • Trends in Solar
      • The Solar Explorer
  • Policy
    • Latest policy headlines
    • IRA/OBBBA Coverage
    • Tariffs and Court Cases
  • Markets
    • Residential
    • Commercial
    • Community Solar
    • Utility
    • Storage
  • Products
    • 2026 Top Products application
    • Winners of SPW’s 2025 Top Products
    • Batteries and Storage
    • Electric Vehicle (EV)
    • Inverters
      • U.S. solar inverter manufacturers
    • Racking and Mounting
      • U.S. solar mounting manufacturers
    • Software
    • Solar Panels
      • U.S. solar panel manufacturers
  • Resources
    • About SPW
    • Digital Issues
    • Event Coverage
    • Podcasts
    • Product Manufacturing Locations
      • U.S. solar inverter manufacturers
      • U.S. solar mounting manufacturers
      • U.S. solar panel manufacturers
    • Solar Classrooms
    • Suppliers
    • Videos
    • Views
    • Voices
    • Webinars / Digital Events
    • Whitepapers
  • 2026 Leadership
    • 2025 Winners
    • 2024 Winners
    • 2023 Winners
    • 2022 Winners
  • Advertise
  • Subscribe