SolarCity says its solar-plus-storage project next to KIUC’s Kapaia power plant is the first utility-scale system in the United States to provide “dispatchable” solar power that is available after the sun goes down. Under the terms of a 20-year power purchase agreement, KIUC will pay SolarCity $0.145/kWh, which SolarCity says is only slightly more than the cost of energy from KIUC’s two existing 12 MW solar arrays whose output is available only during the day. Using the stored solar energy instead of diesel generators will enable KIUC to reduce its use of imported fuels and cut its greenhouse gas emissions.