MN8 and Eos LDES build 86-MW solar project with BESS

MN8 Energy, Eos Energy Enterprises Inc (NASDAQ:EOSE) and Google have unveiled a partnership to deliver an 86-MW solar project combined with short- and long-duration storage to the PJM grid in the US.
The Mammoth Solar project, located in Kanawha County, West Virginia, will be owned and operated by independent power producer MN8. It will feature 70 MW/280 MWh of lithium-ion energy storage, as well as 10 MW/100 MWh of zinc-based long-duration energy storage (LDES) provided by US manufacturer Eos.
Google will buy the project’s energy, capacity and clean energy attributes, supporting the addition of new capacity to the grid that serves its data centres in the region, including a planned project in West Virginia. The deal is also part of Google’s efforts to accelerate the commercialisation of LDES technology.
“Because Google was willing to pair next-generation storage with utility-scale solar, we could engineer proven and emerging technologies into one dispatchable resource – and deliver clean, around-the-clock power where the grid needs it most,” said MN8 President and CEO Jon Yoder.
Representing a capital investment of up to USD 350 million (EUR 302m), the project will be built on a reclaimed coal mine. The solar part is expected to become operational in 2028, followed by the lithium-ion battery storage in 2029 and the LDES system in 2030.
It is the first Google-backed project that will deploy Eos’ American-made Z3 technology. The development is also the first under a previously announced master supply agreement between MN8 and Eos.
Meanwhile, US geothermal developer Fervo Energy on Tuesday unveiled an agreement with Google to supply the tech group with 396 MW of power from its Cape Station GeoCluster project in Utah.