It comes after PGE procured some 400MW of BESS capacity split across two large-scale projects earlier this month, also for 2024 delivery, covered by Energy-Storage.news at the time.

Evergreen is the final project the utility is procuring as part of its 2021 Request for Proposal (RFP), which sought 375-500MW of renewable energy capacity and another 375MW of “non-emitting dispatchable capacity”, a category into which energy storage falls.

Part of that procurement was a massive 311MW wind farm called Clearwater which is scheduled to begin operations in late 2023.

Commenting on the procurement of Evergreen, PGE president and CEO Maria Pope said: “From Clearwater to Evergreen, Portland General Electric is building Oregon’s clean energy future. Our wind, solar, hydro and battery storage facilities work together as part of a resilient grid to provide safe and reliable energy while helping us to manage costs.”

All the aforementioned BESS projects will use lithium-ion battery technology, but PGE has also explored alternatives. In January last year it deployed ESS Inc’s iron flow battery technology in a demonstrator project totalling 3MWh, looking at frequency response, contingency reserve, voltage and VAR support, demand response and resource optimisation.