Increased discussion of a Western RTO is being driven by clean-energy mandates and state laws requiring transmission owners to join an organized market.

CAISO paused its WEIM EDAM effort last year but renewed it Wednesday amid a growing push for greater Western regionalization and market coordination.

CAISO’s top priority in 2021 will be making sure there is enough generating capacity for summer after last year’s shortfalls.

EIM stakeholders broadly support a proposal that would expand the Governing Body’s approval authority and grant it a “more collaborative” relationship with CAISO’s board.

Heat waves and capacity shortfalls have slowed an effort by the Western EIM to expand from a real-time interstate trading forum to a day-ahead market.

The proposed expansion of CAISO’s Western Energy Imbalance Market to a day-ahead market won’t be as voluntary as advertised, some stakeholders are arguing.

CAISO issued a proposal outlining the leading edge of its plan to bring day-ahead trading to the Western Energy Imbalance Market.

Preliminary findings from a WECC study indicate inclusion of day-ahead trading in the EIM will yield reliability benefits that outweigh any expected risks.

PG&E's bankruptcy looks likely to continue through the first half of 2020, while CAISO seeks to expand its EIM and meet reliability requirements.

CAISO will have its work cut out in 2020, with a dozen major policy initiatives moving forward as well as heading off predicted electricity shortfalls.