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SolarCity to Use Tesla's Batteries to Enable Solar at Night

  • Combined solar and energy storage system for island utility
  • Thirteen megawatt system proposed for Hawaiian island of Kauai
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Tesla Powerpack Gets a Major Order

SolarCity Corp., the solar energy company whose largest shareholder is Tesla Motors Inc.Chief Executive Elon Musk, has picked batteries made by his electric-car maker to provide 13 megawatts of electric storage for an array of solar panels to be built on the Hawaiian island of Kauai.

The combined solar and energy storage system is designed to give KIUC, the Kaua‘i Island Utility Cooperative, dispatch-able electricity in the evening, and after the sun goes down. KIUC has a 20-year contract with SolarCity to buy the solar-generated electricity at a competitive price of 14.5 cents per kilowatt hour. SolarCity has chosen Tesla as its battery provider. The project now needs approval by the Hawaii Public Utilities Commission.