The Mammoth Solar project of MN8 Energy in West Virginia, United States, is to have its storage integrated by FlexGen Power Systems, a U.S.-based provider of BESS and energy management software. In that role, FlexGen will run 70 MW/280 MWh of lithium-ion storage and 10 MW/100 MWh of zinc-based storage with 86 MW of solar as one dispatchable resource.
Integrator: FlexGen Power Systems
Owner: MN8 Energy
Solar capacity: 86 MW
Lithium-ion BESS: 70 MW/280 MWh
Zinc-based LDES: 10 MW/100 MWh
Zinc supplier: Eos Energy Enterprises
Control software: HybridOS EMS
LDES operation: 2030
FlexGen Power Systems, a U.S.-based provider of BESS and energy management software, has announced that it will serve as the integrator of the Mammoth Solar project of MN8 Energy in Kanawha, West Virginia, United States. The project, which is owned and operated by MN8, combines 86 MW of utility-scale solar with 70 MW/280 MWh of lithium-ion storage and 10 MW/100 MWh of Eos Z3 zinc-based storage, which is supplied by Eos Energy Enterprises. All of these assets are to be operated as a single dispatchable resource.
In pairing short-duration lithium-ion storage with long-duration zinc-based storage, the project is intended to increase the round-the-clock clean power that is available to local digital infrastructure. It is also to be the first utility-scale deployment of zinc-based long-duration energy storage (LDES) in West Virginia, and the two systems are therefore to be controlled together by the HybridOS energy management system (EMS) of FlexGen. According to the company, the HybridOS codebase has logged more than 13 million hours of runtime, and FlexGen serves more than 25 GWh across over 200 energy storage systems.
The work of integration is to begin before the equipment reaches West Virginia. Under its One Touch Commissioning process, FlexGen is to test and validate the critical system integrations at its laboratory in North Carolina before the hardware is shipped, so that problems can be identified and resolved early and field commissioning can be completed with fewer delays. During commissioning, its Remote Operations Center (ROC) is to provide overnight support, which will allow the work to continue while the field teams are off-site.
Projects like Mammoth Solar reflect the growing sophistication of energy systems that support digital infrastructure, both on the grid and behind the meter as a single dispatchable resource for the grid. That is where FlexGen thrives. Our roots in microgrids and our utility-scale experience give us the expertise to make diverse energy technologies operate as one coordinated power resource, bringing them online predictably, then maximizing the availability and capacity the grid depends on.Kelcy Pegler, Chief Executive Officer of FlexGen
The project had been announced by MN8 on 2 September with Google and Eos, and under that agreement Google is to purchase its energy, capacity and clean energy attributes for the grid that serves its regional data centers. The solar component is expected to reach commercial operation in 2028, the lithium-ion storage in 2029 and the long-duration storage, which has been designed to provide 10 hours of storage, in 2030.