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How Californians get power has been in the news a lot lately, between Pacific Gas & Electric’s woes and Mayor Eric Garcetti’s recent announcement that the Los Angeles Department of Water and Power would phase out three natural gas power plants on its way toward 100 percent renewable energy sources.

“We have an obligation to end dependence on fossil fuels, embrace the technologies of tomorrow, and prioritize renewable energy,” Mr. Garcetti said in a statement to The Times this week.

The question now is how to do that.

Today, the residential solar power provider Sunrun released a report with what its leaders said could be the answer: a mass deployment of residential solar panels, along with batteries, that collectively form a kind of virtual power plant operated by a utility.

“If one of the challenges is that we want to decommission three of these gas plants, we believe that with rooftop solar and storage, we could pretty easily replace one of them by 2030,” said Lynn Jurich, Sunrun’s chief executive and co-founder.