MN8 Energy, Google, and Eos Energy Launch WV Clean Power Project
September 2, 2026 — MN8 Energy, Google, and Eos Energy Enterprises today announced a major collaboration to deliver advanced clean energy solutions to West Virginia. The project pairs 86 MW of utility-scale solar with hybrid storage to supply around-the-clock clean energy for Google’s data centers and the broader PJM grid. Located in Kanawha County on a reclaimed coal mine, the integrated portfolio adds new dispatchable renewable capacity where demand is rising fastest.
Owned and operated by MN8 Energy, the development is designed specifically around data-center load profiles. It marks a significant step in commercializing long-duration energy storage West Virginia and demonstrates how hybrid solar storage project Kanawha County can strengthen grid reliability.
Project Overview
The Mammoth Solar project combines three complementary technologies into a single dispatchable resource:
- 86 MW of utility-scale solar West Virginia
- 70 MW / 280 MWh of lithium-ion energy storage
- 10 MW / 100 MWh of Eos Z3 zinc-based long-duration energy storage (10-hour duration)
Commercial operation is scheduled in stages: solar in 2028, lithium-ion storage in 2029, and the long-duration system in 2030. This is the first commercial-scale long-duration energy storage project in West Virginia and the first Google data center clean energy project to incorporate Eos technology at this scale.
The hybrid design converts intermittent solar generation into firm, flexible capacity that can serve load across more hours of the day.
Why This Hybrid Clean Energy Solution Matters for the Grid
Data centers require reliable power around the clock. Traditional solar alone cannot meet that need. By pairing solar with both short-duration lithium-ion and 10-hour energy storage system technology, MN8 has engineered a portfolio that delivers dispatchable renewable energy PJM operators can count on.
The project directly supports growing demand on the PJM interconnection. Google will purchase the energy, capacity, and clean energy attributes, advancing its commitment to add new clean capacity on the grids where it operates. The approach also accelerates commercialization of long-duration solutions that improve overall system resilience as renewable penetration rises.
American-Made Zinc-Based Long-Duration Energy Storage (Eos Z3)
At the heart of the longer-duration portion sits Eos Energy’s American-made long-duration energy storage technology. The Eos Energy Z3 battery uses aqueous zinc chemistry and is designed to deliver 10 hours of storage. This extends the value of solar generation well beyond the reach of conventional lithium-ion systems.
The deployment is Google’s first project using Eos Z3 technology and the first under the previously announced MN8-Eos Master Supply Agreement. It provides a real-world demonstration of how zinc-based energy storage can support critical grid infrastructure while relying on domestic manufacturing.
Economic Benefits for West Virginia and the Region
The project delivers substantial local and regional value. MN8 estimates up to $350 million in clean energy investment West Virginia. Construction is expected to create approximately 200 jobs, with ongoing full- and part-time roles during operations.
Over the first 20 years, the facility is projected to generate about $4 million in property tax revenue for Kanawha County and local schools, with additional revenue in subsequent years. Sited on a reclaimed coal mine solar project site, the development repurposes land with a long energy history.
MN8 and Eos both maintain significant operations across the Mid-Atlantic and Northeast. The collaboration therefore supports domestic supply chains and regional manufacturing, linking West Virginia infrastructure with Pittsburgh-based Eos production and broader American clean-energy manufacturing.
Quotes from Google, MN8, and Eos Leaders
“At Google, we’re committed to backing solutions that both serve our data center capacity needs and accelerate progress toward cleaner, more affordable energy systems,” said Lucia Tian, Director, Advanced Energy Technologies at Google. “This collaboration with MN8 and Eos aims to deploy a smart portfolio of round-the-clock technology solutions to help power our digital infrastructure, while creating meaningful economic benefits for West Virginia.”
“This project reflects what MN8 does best: understanding a customer’s unique energy profile and building a solution around it,” said Jon Yoder, President and CEO of MN8 Energy. “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.”
“The grid needs more from every megawatt of new generation,” said Nathan Kroeker, Chief Commercial Officer at Eos. “Our work with Google is focused on deploying American-made long-duration storage where it solves real grid reliability challenges. Z3 extends the value of clean generation across more hours, strengthens the overall portfolio, and delivers more dependable capacity when it’s needed most.”
Source: Mn8 Energy
Timeline and Next Steps
- Solar commercial operation: 2028
- Lithium-ion storage: 2029
- Eos Z3 long-duration storage: 2030
Google will offtake the energy, capacity, and associated clean attributes under the agreement. The project forms part of Google’s wider effort to accelerate long-duration energy storage commercialization and bring reliable, affordable electricity to communities and critical loads.
This collaboration between MN8 Energy, Google, and Eos Energy shows how hybrid solar + long-duration storage designs can deliver both grid resilience and local economic opportunity. As data-center demand grows and grids integrate more renewables, projects like this one in Kanawha County offer a practical model for around-the-clock clean-energy data centers and dispatchable capacity on the PJM system.
Stay connected with Renewable Storage News to learn more about long-duration energy storage solutions and similar hybrid projects as the industry scales these technologies nationwide.
I'm Amelia Bonner, an energy storage researcher and technical content writer focused on the technologies shaping the future of reliable, flexible, and sustainable energy systems. My work explores battery energy storage, grid-scale storage, renewable energy integration, battery technologies, and emerging energy storage solutions.
