By Hudson Sangree

SACRAMENTO — A bill that would require California to get 100% of its power from renewable and other zero-carbon resources by 2045 is headed to the desk of Gov. Jerry Brown.

Senate Bill 100 — the 100 Percent Clean Energy Act — passed a major hurdle Tuesday, clearing the state Assembly by a narrow margin, then sailed through the Senate Wednesday. Brown hasn’t said if he will sign or veto the measure, but it dovetails with his ambitious environmental agenda with regard to renewable power.

“This bill will continue California’s energy revolution,” said Sen. Ben Hueso (D), who voted for the measure.

Some Republicans argued against the measure, saying it would raise energy bills, while Democrats said wind and solar were now cheaper alternatives to fossil fuels.

In the Assembly Tuesday, the bill needed a majority vote in the 80-member lower house but remained on call, without the votes for passage, much of the day. It passed in the early evening by a vote of 44-32.

Other measures being weighed this week — the last of the legislature’s 2017-18 session — include a bill that would start CAISO on the road to being an RTO for Western states, letting California tap into wind power from Wyoming and solar power from New Mexico, for instance, while those states could buy California’s clean energy during times of low in-state demand. (See CAISO Regionalization Bill Set on Uncertain Course.)

CAISO’s leadership strongly supports Assembly Bill 813, which is currently being held in the Senate Rules Committee as a deal is worked out to bring it to the Senate floor. The legislature has until midnight Friday to send measures to Brown or watch the bills expire.

SB 100’s fate was unknown until the last minute Tuesday. Sen. Kevin de Leon (D), the bill’s author, had to work his Assembly colleagues on the Senate floor to get the last votes needed to pass the measure before the lower house adjourned for the day. There were a number of Democratic holdouts who had to be persuaded. Former Gov. Arnold Schwarzenegger, former Vice President Al Gore and others weighed in to encourage lawmakers to pass the measure.

In addition to requiring investor-owned utilities, publicly owned utilities and community choice aggregators to obtain 100% of their energy from renewables by 2045, the bill sets milestones along the way: 40-44% by 2024; 45-52% by 2027; and 50-60% by 2030.