The California ISO is closely monitoring coronavirus (COVID-19) developments, and is taking proactive steps to protect our staff, our customers, the community, and the electric grid. Learn more.
The ISO’s Energy Imbalance Market (EIM) is a real-time energy market, the first of its kind in the western United States. The EIM’s advanced market system automatically finds low-cost energy to serve real-time consumer demand across the west. Since its launch in 2014, the EIM has enhanced grid reliability and generated cost savings for its participants. Besides its economic advantages, the EIM improves the integration of renewable energy, which leads to a cleaner, greener grid.