Arizona Public Service and Puget Sound Energy have met the milestones to participate in the CAISO-run Western EIM and will begin trading in the market on Oct. 1.

Arizona Public Service and Puget Sound Energy have moved a step closer to linking up with CAISO’s Energy Imbalance Market (EIM).

At the NARUC Summer Committee Meetings, stakeholders discussed public opposition to infrastructure development, the need for more utility workers and the Plains & Eastern Clean Line.

The western Energy Imbalance Market continued to boost demand for California’s surplus renewable generation last quarter.

FERC rejected the CAISO proposal to prohibit EIM participants from implementing economic bidding at the market’s external interties.