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Tesla Completes Hawaii Storage Project That Sells Solar at Night

  • Provides power that’s cheaper than utility’s cost for diesel
  • Project has 13 megawatts of panels, 52 megawatt-hours storage
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Tesla Inc. has completed a solar project in Hawaii that incorporates batteries to sell power in the evening, part of a push by the electric car maker to provide more green power to the grid.

The Kapaia installation includes a 13-megawatt solar system and 52 megawatt-hours of batteries that can store energy during the day and dispatch it after the sun goes down, the Palo Alto, California-based company said Wednesday. Tesla has a 20-year contract with the Kauai Island Utility Cooperative on the island of Kauai to deliver electricity at 13.9 cents per kilowatt-hour. That’s lower than the utility’s cost for power from diesel plants of 15.48 cents, and about half the 27.68 cents that consumers paid in December for electricity in the state.