Regulation costs in CAISO have quadrupled since the ISO increased requirements to help balance variable output from renewable resources in February.

CAISO's Department of Market Monitoring reported that solar power surpassed wind in 2015, becoming the largest source of renewable generation.

FERC approved a request by CAISO to eliminate from its Tariff a provision establishing convergence bidding at scheduling points on the interties into Ca.

NV Energy had a smooth integration into the Western Energy Imbalance Market (EIM), CAISO said.