California regulators are poised to shake up the solar market for the state’s apartments, schools and farms.

An administrative law judge is proposing changes that critics say make the economics of investing in solar projects unappealing.

The California Public Utilities Commission (CPUC) rewrote the net energy metering (NEM) rules for solar on single-family homes last year and could do the same for bigger complexes that have one solar array with multiple metered hookups.