In a 250-page proposed decision, regulators outlined reforms to the so-called "net energy metering", a state policy that issues credits to solar energy customers for generating excess electricity and feeding it back to the grid. The proposal will not affect current home solar owners and will maintain their current compensation, the California Public Utilities Commission (CPUC) said. Shares of rooftop solar system providers, including Sunrun Inc (RUN.O), SunPower Corp (SPWR.O) and Sunnova Energy International Inc (NOVA.N), closed 20% to 27% higher on Thursday. "This has been an overhang for rooftop solar stocks that would be alleviated if passed similar to today's proposal," said Morningstar analyst Brett Castelli. "The CPUC's new proposed decision would really hurt.

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