Puerto Rico Rooftop Solar Hits 1,456 MW, 20% of Grid
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- Rooftop solar in Puerto Rico reached 1,456 MW at the end of 2025, accounting for 20% of the island's overall capacity mix and becoming the second-largest source behind petroleum liquids (3,671 MW), surpassing natural gas (1,391 MW).
- Rooftop solar accounted for 81% of all new generating capacity added in Puerto Rico between 2016 and 2025, outpacing every other source over the decade.
- On average, 3,850 rooftop solar systems were installed per month in Puerto Rico in 2025, bringing the cumulative total to 191,929 residential and business systems by year-end.
- Distributed battery storage grew alongside solar, with 171,372 households and businesses holding systems totaling 2,864 megawatt-hours of energy capacity at the end of 2025.
- LUMA, Puerto Rico's grid operator, expanded its Customer Battery Energy Sharing program last summer, allowing thousands of distributed batteries to feed the grid during forecasted supply shortages as aggregated virtual power plants.
- Sunrun, Tesla, and other companies manage virtual power plants with LUMA, with participating battery owners financially compensated for exporting excess electricity back to the grid.
Why it matters: Puerto Rico's chronic grid instability and frequent outages have catalyzed a structural shift toward distributed energy: rooftop solar now supplies 20% of capacity, and the 171,372 household battery systems are being aggregated into virtual power plants that actively feed LUMA's grid during shortages, making distributed resources a permanent pillar of the island's energy supply rather than backup.
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