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Willey Battery Utility

Perennial Power owns 100% interest in and operates the Willey Battery Utility, an innovative battery power storage system which provides a reliable and stable supply-demand balancing service for the frequency regulation market operated by PJM, the largest independent service operator of wholesale electricity in the United States. 

As a developer and operator of thermal and renewable power infrastructure,  Sumitomo Corporation and Perennal Power contribute to the stable power supply through energy storage service which is indispensable for future clean energy world.

Link to Sumitomo Corporation Energy Storage Projects:



Hermiston Generating Plant (HGP) is located in northeastern Oregon, nine miles south of the Columbia River. HGP is a 474 megawatt highly reliable modern natural gas fueled power plant that provides power for nearly 500,000 households in the Pacific Northwest. The plant also provides steam to Lamb-Weston's adjacent potato processing plant.

Hermiston Generating Plant
78145 Westland Road,
Hermiston, OR 97838

Chad Daniel
Plant Manager