Hawaiian Electric Industries, Inc., together with its subsidiaries, engages in the electric utility business in the United States. It operates through Electric Utility and Other segments. The Electric Utility segment engages in the production, purchase, transmission, distribution, and sale of electricity in the islands of Oahu; Hawaii; and Maui, Lanai, and Molokai. This segment’s renewable energy sources and potential sources include wind, solar, photovoltaic, geothermal, wave, hydroelectric, municipal waste, and other biofuels.