ESS agrees 200MW long duration storage deal

ESS agrees 200MW long duration storage deal

ESS agrees 200MW long duration storage deal 750 563 Energy Storage Journal

September 22, 2022: Iron-based flow battery company ESS is to deploy up to 200MW/2GWh of long duration energy storage in the US under a multi-year agreement announced on September 20 with the Sacramento Municipal Utility District (SMUD).

ESS said it will deliver a mix of its Energy Warehouse and Energy Center systems to be integrated with SMUD’s grid, starting in 2023.

ESS plans to set up facilities for battery system assembly, operations and maintenance support and project delivery in Sacramento, while also establishing a “center of excellence” to train and expand the workforce for long duration energy storage technology in partnership with higher education institutions.

The facility will create “a state-wide skilled talent pool to help build and maintain California’s fast-growing LDES resources”, ESS said.

An ESS spokesperson told BESB that exact details about the number of systems that will eventually be deployed will be announced later. However, the 2GWh figure takes into account the storage duration of the systems, which is four to 12 hours.

The addition of 2GWh of storage, when coupled with renewable energy sources, is equivalent to removing 284,000 tonnes of CO2 emissions per year and will provide enough energy to power 60,000 homes for 10 hours, ESS said.

SMUD’s CEO and general manager Paul Lau said: “Long-duration battery technologies move SMUD’s 2030 zero carbon plan forward by expanding our dispatchable renewable energy resources and opening doors to innovation, job training and development opportunities in the green energy sectors.”

ESS chief executive officer Eric Dresselhuys told an earnings call on August 11 that the company had doubled its annual production capability to 500MWh with the addition of a new manufacturing line in the second quarter of this year.

Dresselhuys said the firm expected to have its next fully automated line up and running in the fourth quarter, taking annual capacity to 750MWh — “tripling where we started the year”.