West Virginia solar project to pair lithium BESS with zinc long-duration energy storage

The Mammoth Solar project in Kanawha County is designed as a dispatchable solar-plus-storage resource, with solar operations expected in 2028, lithium-ion storage in 2029 and long-duration storage in 2030. The Eos Z3 system will provide 10 MW/100 MWh of 10-hour storage and marks Google’s first project using the American-made technology. MN8 estimates up to $350 million in capital investment, roughly 200 construction jobs and about $4 million in property tax revenue for local schools and the county over the first 20 years.