Renewable energy developer-operator Arevon has entered into a long-term offtake agreement for a 250MW/1,000MWh battery energy storage system (BESS) in California with community choice aggregator (CCA) MCE.

Mitsubishi Power Americas and Powin Energy have been appointed to retrofit 640MWh of batteries to solar PV plants in California, while a community energy group in the state has just signed a power purchase agreement for a 100MW solar plant with 150MW / 600MWh of storage.

A group of 11 community-focused energy utility groups in California have issued a Request for Information on long duration energy storage technologies that could be connected to the California Independent System Operator (CAISO) grid.