Bidders in the solicitation by the Public Service Co. of Colorado to buy 1,800 megawatts of electricity were allowed to refresh their bids in late February to reflect the new US tax laws and import tariffs on solar panels. The utility received more than 400 bids. Of the refreshed bids, 26% came in lower, 16% were higher, and the rest were unchanged. The median wind bid increased 6.6% to $19.30 a megawatt hour. The median solar bid increased 5.5% to $30.96. Standalone storage fell by almost 7% to $10.53 a KW-month. Wind plus storage fell slightly to $20.63 a megawatt hour. Solar plus storage increased 6.4% to $38.30.

Lithium-ion battery prices have fallen by 80% in the last eight years, according to Bloomberg New Energy Finance.

Geisha Williams, CEO of PG&E Corporation, said at the CERAWeek conference in Houston in March that the California utility expects to have retained only 50% of the retail electricity customers in its service territory by 2020. Many customers are moving to county-level entities called community choice aggregators.

Solar accounted for 62.4% of renewable energy capacity additions worldwide in 2017, according to a new report by the UN Environment Program. In all, 157,000 megawatts of new renewable capacity was added in 2017. Solar was 98,000 megawatts.

Community solar now accounts for 20% of commercial and industrial solar installations in the United States, according to GTM Research. Minnesota and Massachusetts were more than 80% of the community solar market in 2017.