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

FERC  revoked authorization for Berkshire Hathaway Energy subsidiaries to sell wholesale power at market-based rates in four  balancing authority areas.

FERC upheld a decision that prohibits two companies’ generating units from offering energy into the Western EIM at prices above default energy bids.

The expanded western EIM provided California a new outlet for surplus renewables, according to CAISO.

PacifiCorp says future participants in the CAISO EIM forum will benefit from early lessons the company learned attempting to integrate.

Idaho Power signed an agreement with CAISO to become the sixth utility to join the western Energy Imbalance Market.

CAISO told FERC that its software’s inability to recognize available balancing capacity was creating false scarcity in the market.

The California ISO’s expansion of its energy imbalance market to six other states have some asking the question: Is this the beginning of an RTO West?