Batteries you can buy today. Solar that bends. A Japanese plant that makes power from salt water. Small nuclear plants going up. Beaming power from space. And fusion that still isn’t on the grid. Here’s what’s real — and what isn’t. California power bills are among the highest in the country. In the North State, we feel that every summer: hot days, fire shutdowns, and a grid that was never built for all the new electric cars and air conditioners. Labs have been promising chea