Ameresco signs deal to construct 100MWh US BESS

July 9, 2024

Cleantech integrator Ameresco has signed a contract with Snohomish County Public Utility District (PUD) in the US state of Washington to construct a battery energy storage system (BESS) with a 20-year guaranteed capacity of 25MW / 100MWh.

The installation “represents the largest standalone battery project to date in the Pacific Northwest,” an Ameresco statement said.

Under the terms of the 25-year tolling agreement, Ameresco will be the asset owner and Snohomish PUD will be the exclusive customer of the project.

Construction on the energy storage asset is currently expected to begin in late 2024 and be operational in late 2025.

“This project represents a paradigm shift in the Pacific Northwest energy industry,” said Nicole Bulgarino, executive vice president at Ameresco. “By collaborating with Snohomish PUD, we are pioneering a unique model where the owner and the customer are distinct entities, showcasing the versatility and scalability of utility-scale storage solutions.”

John Haarlow, Snohomish PUD CEO/general manager, added: “We’re excited to work with Ameresco on making this new battery energy storage project a reality. Energy storage is a critical component to helping us keep the grid reliable and affordable while also meeting our clean energy goals.”