Sunrun Shares Rise: Sunrun Massively Expands Flexible Power Supply in the U.S. With Residential Solar Storage

San Francisco (USA) - Sunrun, the largest provider of residential battery storage, solar, and home-to-grid systems in the United States, significantly expanded its distributed energy storage assets in 2025.

Participation by customer-owned systems increased more than fivefold, making Sunrun one of the largest sources of flexible, dispatchable energy in the U.S. In total, nearly 18 gigawatt-hours (GWh) of energy were fed into the grid, with peak output reaching 416 MW.

“Sunrun’s distributed power plants hit scale at exactly the same time grid operators needed help meeting energy demand,” said CEO Mary Powell. “It was a record-breaking year, both in terms of U.S. power demand and Sunrun’s ability to deliver large amounts of energy to grids across the country quickly, reliably, and at lower cost.”

The largest deployments took place in Texas, California, Maryland, Puerto Rico, and along the U.S. East Coast, where the distributed solar power plants provided critical grid relief during extreme heat, high demand, or outages. Sunrun operates 217,000 residential battery systems—the largest fleet in the United States—and plans to reach 10 GWh of dispatchable battery storage capacity by the end of 2028. In 2025 alone, solar customers earned more than USD 17 million through participation in Sunrun programs.

Sunrun shares, which are listed in the global RENIXX renewable energy stock index, gained 1.4 percent in yesterday’s trading to EUR 15.60.

Sunrun thus demonstrates that distributed battery storage paired with solar energy is a fast and cost-efficient way to meet rising electricity demand, stabilize grids, and avoid new, costly power plant or transmission projects.

Source: IWR Online, 04 Feb 2026