A Southern California Edison sign outside the San Onofre Nuclear Plant.
A new set of rules passed yesterday by the state's public utilities commission have put energy storage in the spotlight.
The rules require the big utility companies — including Southern California Edison — to invest big in storing energy for later use. That includes creating enough storage to power almost a million homes by 2020.
Dana Hull, energy and clean technology reporter for the San Jose Mercury News, joins the show to explain.