power grids are fast approaching their limits of renewable energy capacity additions. Faced with a growing pile of solar project applications — more than 57 MW worth of capacity, from projects 300 kW and larger, is expected this month alone — Okinawa Electric Power is turning to energy storage to help. Its solution: a 2-MW lead-acid battery installation, will be set up in the next fiscal year (starting April 2014) and will run 1-2 years. A similar project is reportedly underway in Hokkaido.
Energy storage is the Next Big Thing.