Eos Energy Stocks Soar on Massive West Virginia Solar Project

Eos Energy Enterprises' stock rose 12% on Wednesday following an announcement of a collaboration with MN8 Energy and to build a solar and energy storage project in West Virginia.

The Mammoth Solar project combines 86 MW of utility-scale solar, 10 MW/100 MWh of Eos' Z3 zinc-based long-duration energy storage, and 70 MW/280 MWh of lithium-ion energy storage.

The integrated portfolio will add clean, dispatchable capacity to the PJM grid serving Google's data centers in the region. The solar project is expected to reach commercial operation in 2028, with lithium-ion storage and long-duration storage following in 2029 and 2030, respectively.

Google will purchase the energy, capacity, and clean energy attributes of the project, marking its first deployment of Eos' American-made Z3 technology. The project represents up to $350 million in capital investment and is expected to generate approximately $4 million in property tax revenue for the county and local schools over the first 20 years of operations.