Puerto Rico has begun using batteries connected to residents’ rooftop solar panels to provide backup power for its grid, helping prevent blackouts and offering an alternative to fossil fuel-burning peaker plants. It could be the first step toward building one of the largest virtual power plants of its kind.
The yearlong pilot, launched late last year by Puerto Rico’s utility Luma Energy, will pull power from up to 6,500 households during energy shortages. It is part of a transformational effort to modernize a deteriorating grid and transition to clean energy.
If the program is successful, it could lead to a much larger virtual power plant with the potential to make peaker plants, which run only when demand spikes, unnecessary. “It could be really significant,” said Ben Hertz-Shargel, a grid expert at the research firm Wood Mackenzie, adding that if it were expanded to include all home batteries on the island, it would be larger than any residential-storage virtual power plant in North America.
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