SACRAMENTO, Calif.—A controversial vote before the California Public Utilities Commission on a proposal that could dramatically change the state’s burgeoning rooftop solar industry has been indefinitely postponed, according to officials. The commission’s proposal—as it reads now—is to not only reduce credits up to 80 percent those homeowners and businesses receive when they generate more power than they use from their solar setups but to also charge solar users about $50 more a month for what the commission calls a “grid participation” charge. Commission officials say the changes are needed so solar users can help fund the approximately 13 million homes in California that are not using solar and to ensure solar users are equally helping maintain the state’s power grid which has become overloaded and failed, at times, especially during hot, extreme summers. California Gov. Gavin Newsom said during a news conference earlier this month, that “changes need to be …