Cost-Effective Residential Energy Storage Here in 2017

Greentech Media: "What the Ice Cub team came up with is sized like a 2.5-ton AC unit, the kind that serves small to medium-sized households. This AC has a special power, though: in between air conditioning cycles or when it's not in use, it freezes water in an insulated tank. It can fill the tank with ice in four hours. Then, on command, the system can switch from conventional AC to using the ice to cool the house for at least three hours, during which time no energy is needed to chill the air."

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