February 23, 2025

Arizona Public Service (APS)

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Arizona to Weigh RTO Membership
Arizona has joined Colorado, Nevada and Oregon in exploring membership in an RTO in the Western Interconnection.
Arizona Public Service
Ariz. Program to Incentivize Home Battery Storage, Efficiency
Arizona regulators approved a demand management plan that includes incentives for homeowners who install battery storage with their rooftop solar system.
Western Drought Increases Wildfire Risks
Utility wildfire experts told WECC that another expected year of hot, dry weather will increase the danger of major fires in the West.
Cold Snap Yields Record Q1 Benefits for Western EIM
CAISO's EIM provided its members $101.01 million in economic benefits during the first three months of 2021, an increase of 75% over a year ago.
APS: Managing Reliability with DERs ‘A Matter of Life and Death’
A panel at WIRES’ virtual spring conference focused on the challenges of integrating and managing DERs after FERC Order 2222.
NERC Warns of Batteries’ Hidden Thermal Risk
A new Lessons Learned report published by NERC goes over the mistakes that led to the fire and explosion of APS’ McMicken battery in Arizona.
CAISO, NYISO, Companies Win Partial OK on Order 845
FERC largely approved the Order 845 compliance filings for CAISO, NYISO and a handful of utilities, though none of the entities received perfect marks.
EIM Reports $60M in Q4 Benefits
CAISO’s Western EIM delivered more than $60 million in benefits to its participants in the fourth quarter of 2019, bringing the total to $862 million.
Standards Committee Briefs: Aug. 21, 2019
The Standards Committee approved the posting of a report recommending new evidence retention rules and rejected a SAR on frequency response.
Rising Solar Boosts EIM Q2 Benefits to $86M
CAISO secured the largest chunk of the EIM’s $86 million in gross benefits during the second quarter as the solar-heavy ISO exported 2.16 million MWh.

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