Interesting stats in the article: "In the first half of this year, California tossed out more than 300,000 megawatts produced by solar panels and wind farms because there's no good way to store it. That's enough to power tens of thousands of homes. About 4 percent of all wind energy from Germany was jettisoned in 2015, according to Bloomberg New Energy Finance. China throws out more than 17 percent."
Alphabet Inc.'s secretive X skunk works has another idea that could save the world. This one, code named Malta, involves vats of salt and antifreeze. The research lab, which hatched Google's driverless car almost a decade ago, is developing a system for storing renewable energy that would otherwise be wasted.