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December 28, 2025

California Independent System Operator (CAISO)

Foes Narrow Differences at FERC Summit on EIM Bidding
Last week's FERC technical conference on the EIM began on a contentious note but concluded with participants understanding each others’ perspectives.
Price Tag on Tx Needed to Meet California 50% RPS: $5B?
Meeting the California RPS goal of 50% target could require more than $5 billion in transmission upgrades, according to a state report.
SMUD to Join EIM in Spring 2019 at the Earliest
The Sacramento Municipal Utilities District (SMUD) will join the Western EIM in spring 2019 at the earliest, according to the head of BANC.
FERC Rejects CAISO Refunds over Must-Offer Charges
FERC rejected the CAISO effort to refund $217 million that the ISO said were overcharged for payments to generators operating under must-offer obligations.
FERC OKs Natural Gas Index for CAISO
FERC approved the CAISO natural gas price index used in response to the closure of the Aliso Canyon storage facility.
FERC Grants TransCanyon 9.8% ROE for CAISO Projects
FERC approved a settlement allowing TransCanyon to collect a 9.8% base ROE for any projects it builds under the CAISO FERC Order 1000 competitive solicitation process.
FERC Eliminates West-Wide Must-Offer Rule
FERC last week eliminated the must-offer obligation in effect throughout WECC since the tail-end of the California energy crisis of 2000-2001.
CAISO Planners Looking Ahead to Summer 2017 Solar Eclipse
CAISO is seeking stakeholder input on how to respond to a solar eclipse that will significantly curtail output from California’s growing solar generation portfolio next August.
Sacramento Utility to Join EIM; Other BANC Members May Follow
The Sacramento Municipal Utility District will join the CAISO EIM and other members of the Balancing Authority of Northern California (BANC) may follow.
More Work Needed on Western RTO Proposal, Stakeholders Say
More changes are needed to the CAISO proposed rules for a Western RTO to win approval from the states in which PacifiCorp operates, stakeholders say.

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