Arizona is quietly joining a growing energy market that’s expected to eventually save customers of the state’s largest utility millions of dollars.
This weekend, Arizona Public Service (APS) entered the Energy Imbalance Market (EIM), which is operated by the California Independent System Operator and also includes utilities in Nevada, Utah and the Pacific Northwest.
The EIM allows utilities across the region to buy power from each other in close to real time increments of five minutes.
For example, on a cool, temperate summer day in the Pacific Northwest, energy demand might be down. Meanwhile, Phoenix could be in the triple digits with customers cranking up their air conditioners. Brad Albert, who is director of resource management at APS, said that creates an opportunity for APS to buy cheap surplus power.