Massachusetts is pushing hard on the renewable energy front, with more than 1600MW solar installed and a target of 1600MW offshore wind energy by 2020. Since sunshine and wind don’t always match consumer demand for electricity, the Commonwealth has set a goal of 200MWh of energy storage capacity by 2020, and is putting more than $10 million into energy storage research and demonstration projects. The Department of Energy Resources puts the Commonwealth’s total energy storage capacity at just