Cooling represents 20% of global electricity demand in buildings, a share that’s expected to rise as the planet warms and more of the world turns to cooling technology. During peak demand hours, air conditioners can account for over half the total demand on the grid in some parts of the world today.

New cooling technologies that incorporate energy storage could help by charging themselves when renewable electricity is available and demand is low, and still providing cooling services when the grid is stressed.

For the first time ever, California's batteries took over gas as the primary source for supplying evening power demand in April, providing "akin to the output from seven large nuclear reactors" one evening, according to the New York Times.

These records were broken in the Californian spring, when there was plenty of sunshine without the summer heat that causes people to turn on the air-conditioning and consume more power, but it's a sign of the shift underway.

Technically not green, but I thought you guys would be interested