A Fight Over Rooftop Solar Threatens California’s Climate Goals

Some energy experts say utilities would not be able to produce or buy enough renewable energy to replace what would be lost from the decline in rooftop solar panels — which supplied 9 percent of the state’s electricity in 2020, more than nuclear and coal put together. California would need to set aside about a quarter of its land for renewable energy to meet its climate goals without expanding rooftop solar, said Mark Z. Jacobson, a professor of civil and environmental energy at Stanford. As a result, utilities would have to turn to natural gas and other fossil fuels.

“The only thing this is going to do is reduce rooftop solar,” Professor Jacobson said. “That will mean there will be more natural gas in the system. Every rooftop should have solar on it. You should be encouraging more of it.”

People who install solar panels on their roofs or property are still connected to the electrical grid, but they receive credit on their bills for power they produce beyond what they use. California’s proposal would cut the value of those credits, which are roughly equivalent to retail electricity rates, by about 87 percent. In addition, the measure would impose a new monthly fee on solar homeowners — about $56 for the typical rooftop system.

The monthly cost of solar and electricity for homeowners with an average rooftop system who are served by PG&E, the state’s largest utility, would jump to $215, from $133, according to the California Solar and Storage Association.

An intense campaign is underway to sway regulators. Rooftop solar companies, homeowners and activists on one side and utilities and the International Brotherhood of Electrical Workers on the other are lobbying Gov. Gavin Newsom to intervene. While the commission is independent of Mr. Newsom, he wields enormous influence. The governor recently told reporters that the regulators should change their proposal but didn’t specify how.

The electrical workers union, which did not respond to requests for comment, is playing a central role. It represents linemen, electricians and other utility employees, who usually earn more than the mostly nonunion workers who install rooftop systems. Many union members, an important constituency for Democrats, fear being left behind in the transition to green energy.

Other states are also targeting rooftop solar. Florida is considering legislation to roll back compensation to homeowners for the excess energy their panels produce, a benefit known as net energy metering.