The island of Ta’u in the U.S. territory of American Samoa relied heavily on diesel generation to meet its electricity needs until a “solar+storage” microgrid was installed in 2016. Now, instead of USING 300 gallons of imported diesel fuel every day, the island’s homes and businesses are almost entirely powered by solar+storage. A 1.4-megawatt photovoltaic (PV) and 6-megawatt-hour storage system developed can power the entire island for three days without sunlight and can fully recharge in seven hours.