Sunrun Doubles Puerto Rico Home Battery Power Plant

Enrollment in the distributed power plant now exceeds 60,000 customers, with nearly 70,000 home batteries contributing to grid support.

Updated on Nov. 3, 2026 in Utilities

Sunrun Doubles Puerto Rico Home Battery Power Plant

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Should home batteries be used to help keep your local power grid running during shortages?

Sunrun's distributed power plant in Puerto Rico has more than doubled its participation to over 60,000 customers, representing nearly 70,000 home batteries. The plant delivers 45 megawatts of dispatchable power for four hours at a time, and LUMA has called on the batteries to help prevent outages.

Why it matters

Puerto Rico has faced severe energy shortfalls and rising outage hours, and the home-battery program offers a way to supply power during peak demand and prevent rolling blackouts. Sunrun says the model may serve as a blueprint for the U.S. mainland.

The power plant delivers 45 megawatts of dispatchable power for four hours at a time and has been dispatched more than 60 times since April. Sunrun dispatched its home batteries for 18 consecutive days beginning October 13, but the source does not specify how long these dispatch periods will continue.

The players

Sunrun

A San Francisco-based residential solar and battery company that operates the distributed power plant and is the largest aggregator in Puerto Rico's Customer Battery Energy Sharing program.

LUMA Energy

The private operator responsible for managing Puerto Rico's electric transmission and distribution system, which publicly credited home batteries with helping maintain grid stability.

The details

Customers choose how much of their battery capacity to share, with most contributing a small portion, and are compensated for the power they provide. Sunrun is the largest aggregator in Puerto Rico's Customer Battery Energy Sharing program, and it dispatched the plant during an extended period of unseasonably hot temperatures this fall.

2024: Approximately 4,000 customers enrolled in the program.
2025: Enrollment surpassed 30,000 customers and outages rose 19% over the prior year.
April 2026: Sunrun began dispatching its power plant to prevent blackouts.
June and July 2026: LUMA publicly credited home batteries with preventing outages.
October 13, 2026: Eighteen consecutive days of home battery dispatch began.

Roadmap

Sunrun's Puerto Rico distributed power plant operates through Puerto Rico's Customer Battery Energy Sharing program, which it leads as the largest aggregator. The company states that this home-battery model may serve as a blueprint for the U.S. mainland as grid operators seek flexible capacity.

Residents who own home batteries may be able to share capacity with the grid and receive compensation, though the source does not detail enrollment steps. For households across Puerto Rico, the program aims to reduce the frequency of outages that averaged 36 hours in 2025.

The takeaway

Distributed home batteries are emerging as a tool for grid stability during periods of high demand. Puerto Rico's experience may indicate how similar programs could be applied elsewhere as utilities look for flexible power sources.