SolarCity announced today that the company signed a power purchase agreement (PPA) with Kaua’i electric utility (KIUC). SolarCity already built a 12-megawatt solar array for KUIC which  went into operation in September 2014 and now supplies 5% of the island’s electricity, but under the new deal, the California-based solar installer will develop a new solar array and a massive 52 MWh energy storage system to provide electricity when the sun is down. expand full story