Sunrun Expands Home-to-Grid Power Leadership

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Sunrun is expanding its position as the nation’s largest residential battery storage, solar, and home-to-grid power plant provider, achieving a 70% storage attachment rate in Q2 2025 and operating more than 130,000 activated home batteries.

These capabilities give Sunrun a dispatchable capacity of 650 MW of peak power—enough to supply 480,000 homes—making it a critical player in preventing blackouts and stabilizing the grid during peak demand events.

“Not only is Sunrun providing Americans with reliable and affordable energy, we are scaling our generation business and helping stabilize the electricity grid while we do it,” said Mary Powell, CEO of Sunrun.

Grid-Scale Impact from Residential Networks

Sunrun’s distributed power plants have supported grids in California, New York, Massachusetts, and Puerto Rico this summer, including a single-day dispatch of over 340 MW during a prolonged June heatwave. In Puerto Rico, more than 37,000 home batteries have been activated to help the island avoid evening blackouts.

With more than 3.2 GWh of networked storage capacity installed across 195,000 solar-plus-storage systems, Sunrun’s residential network rivals the scale of mid-sized utility plants, but with faster deployment timelines and local resilience benefits.

Technology and Customer Offerings

  • Tesla Electric + Sunrun Flex Plan in Texas offers fixed low electricity rates, competitive solar sellback rates, and seamless battery management for outage protection.
  • Intelligent software integrates storage and solar production to maximize value for homeowners while enabling grid services.
  • Flexible business model includes a no-upfront-cost subscription, making advanced energy systems more accessible.

Operational Scale

  • 941,701 subscribers as of June 30, 2025
  • 227 MW of solar and 392 MWh of storage installed in Q2 2025
  • 50% year-over-year growth in customers adding storage
  • Storage attachment rate up from 54% last year to 70% today

By combining grid service contracts, advanced battery management, and mass-market solar deployment, Sunrun is positioning residential customers as an integrated part of America’s clean energy infrastructure.

Environment + Energy Leader