California Independent System Operator (CAISO)

Balise42, CC BY-SA 4.0, via Wikimedia Commons
CAISO Monitor Seeks Speedy Replacement of Interim EDAM Congestion Revenue Approach
CAISO’s Department of Market Monitoring urged the ISO to replace its interim congestion revenue allocation rules under its forthcoming Extended Day-Ahead Market “as soon as practicable.”
© RTO Insider 
‘Widespread Support’ for CAISO’s $8.5M ROWE Funding Plan
CAISO is moving toward approval of an $8.5 million financing plan for the Regional Organization for Western Energy’s start-up costs.
Portland General Electric
ROWE to Address Governance of New Western RA Program by Fall
One of the first items the yet-to-be-seated board of the Regional Organization for Western Energy could decide on is whether to administer a resource adequacy program, as backers seek to have a proposal in place later in 2026.
LADWP
Alternative Western RA Program Starts to Take Shape
Participants in CAISO’s Extended Day-Ahead Market likely would remain subject to the market’s daily resource sufficiency evaluation even if they joined a new resource adequacy program that’s being crafted.
CAISO
CAISO Looks to Improve Data Quality from Solar, Wind, Battery Resources
CAISO is proposing new methods to address “poor quality data” from some variable energy resources in the region in order to improve grid forecasting, the ISO said in a straw proposal.
CEC
EV Capacity More Than Battery Storage in California, CEC Finds
California’s historic battery storage boom over the past five years has not kept up with EV capacity growth in the state — and now officials want to send idle electrons back to buildings, homes and the grid through new bidirectional chargers.
Microsoft
CAISO Developing Large Loads Technical Standards
Although large loads are not new to California or the West, CAISO is formulating technical standards that address their potential boom over the coming years.
© RTO Insider 
EDAM Governance Questioned During NV Energy Hearing
As Nevada regulators consider NV Energy's request to join CAISO's Extended Day-Ahead Market, the debate over the independence of EDAM's governance is intensifying.
CAISO DMM
Battery Capacity, Coal Use Rise in WEIM in 2025
CAISO’s Western Energy Imbalance Market saw an increase in battery storage capacity and coal use in 2025 compared with 2024, although the total load across the market did not increase over the year.
CAISO
EDAM Opening Schedule on Track Despite Lingering Testing Issues
It’s an “all-hands-on-deck” moment for CAISO to open its extended day-ahead market in less than two months, CAISO’s CEO Elliot Mainzer said at a Western Energy Market Board of Governors meeting.

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