By the summer of 2017, solar homeowners could store surplus daytime solar in an ice-based energy storage unit with a 20-year life, for less than half the cost of a battery storing the same solar kilowatt-hours, according to Ice Energy CEO Mike Hopkins.

By the summer of 2017, solar homeowners could store surplus daytime solar in an ice-based energy storage unit with a 20-year life, for less than half the cost of a battery storing the same solar kilowatt-hours, according to Ice Energy CEO Mike Hopkins.