The cooperative utility on the Hawaiian island has signed a contract for design and engineering of a 25 MW pumped hydro project, plus an unspecified volume of solar, to provide “dispatchable” renewable energy and allow the island to integrate an unprecedented level of solar.
A recent analysis from the U.S. Department of Energy shows the Midwest and Plains States in the lead, but the coasts are on a track to catch up thanks to mandates.
Hawaii’s investor-owned utilities are in negotiations with developers to build seven solar projects across three islands.
The residential solar company’s move in one of America’s most complicated solar markets may be a key to getting ready for a more complex future.
Massachusetts has joined California, Hawaii, Nevada and Vermont in the club of states where solar represents 10% or more of in-state generation. Solar made up 2.4% of total generation in the United States during the first half of 2018, with solar and wind together making up slightly less than 10%.
The island’s 7,000 residents are expected to see savings from the 4.9 MW solar and 2.6 MW of battery storage that Half Moon Ventures plans to install on the island.
A ruling by state regulators will allow the more than 60,000 Hawaiian homeowners and businesses that have PV systems installed under previous net metering rules to add energy storage without violating their agreement.
The 70 MWh energy storage system accompanying a 19 MW solar project is one of the largest batteries to be deployed in the United States, and is coming in at under 11 cents per kilowatt-hour.
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