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March 27, 2026

Tucson Electric Power (TEP)

APS
Tug-of-war Developing over Ariz. Clean Energy Rules
As state regulators begin a process to repeal renewable energy and energy efficiency standards for electric utilities, a group of lawmakers want the regulators to reconsider clean energy rules they previously rejected.
CAISO
WEIM Sees Record Q1 Benefits with Growth of Footprint
CAISO’s Western Energy Imbalance Market yielded members $418.82 million in economic benefits during the first three months of 2023, a first-quarter record.
SPP
SPP Moving Quickly on Markets+’s Development
SPP has executed funding agreements with eight Western Interconnection entities for the first phase of its Markets+ market, accelerating its development.
Nikola Corp.
Supporters See Strong Potential in SW Hydrogen Hub
Energy leaders in Arizona and Nevada have partnered on a clean hydrogen hub proposal that supporters say has many of the right pieces to win federal funding.
WestConnect
WestConnect Tx Cost Allocation Plan Rejected by FERC
FERC rejected a proposed settlement intended to resolve a longstanding dispute over how to implement Order 1000 in the WestConnect planning region.
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Ariz. Regulators Probe CAISO on EDAM, Heat Wave Operations
Arizona utility commissioners said they wanted to see more independent governance for CAISO before further committing to the WEIM.
Arizona Corporation Commission
4 Arizona Entities Commit to Developing SPP’s Markets+
Four Arizona entities have joined seven Pacific Northwest entities to support the next phase of SPP’s Markets+ development.
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BPA, Tucson Electric Power Enter Western EIM
The Western EIM took on BPA and Tucson Electric Power as new participants, marking the market’s largest single expansion since its founding.
Shutterstock
Retail Anti-competition Bill Hits Snag in Arizona
A bill that would close the door to electric retail competition in Arizona has hit a snag in the state legislature.
CAISO
Western EIM Nears $2B in Total Benefits
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.

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