Four Arizona entities have joined seven Pacific Northwest entities to support the next phase of SPP’s Markets+ development.

The Western EIM took on BPA and Tucson Electric Power as new participants, marking the market’s largest single expansion since its founding.

A bill that would close the door to electric retail competition in Arizona has hit a snag in the state legislature.

CAISO's Western Energy Imbalance Market hit a record $739 million in member benefits in 2021, putting its total close to $2 billion since it launched in 2014.

Arizona regulators rejected energy rules that would have required the state’s electric utilities to cut carbon emissions 50% by 2032 and 100% by 2070.

The Arizona Corporation Commission approved a statewide transportation electrification plan developed by utilities and intended to accelerate EV adoption.

A new report estimates the long-term costs of going green for Arizona ratepayers.

Managed-charging strategies emerge as incentives intended to encourage EV owners to charge during off-peak hours create late-night surges in power use.

Arizona has joined Colorado, Nevada and Oregon in exploring membership in an RTO in the Western Interconnection.

FERC provided guidance to Western electricity sellers on how and when to seek exceptions for transactions that exceed the region’s $1,000/MWh soft cap.