Key Highlights
- Shares of Eos Energy (EOSE) surged 12% following the announcement of a major clean energy partnership with Google and MN8 Energy in West Virginia.
- The initiative will feature 86 MW of solar capacity, 10 MW/100 MWh of Eos’ proprietary Z3 zinc-based storage technology, and 70 MW/280 MWh of lithium-ion batteries.
- Google has committed to purchasing the full output of energy, capacity, and renewable energy credits from the facility.
- The partnership represents a capital investment of up to $350 million and is projected to generate approximately 200 construction positions.
- This marks Google’s inaugural deployment of Eos’ domestically-produced Z3 technology and the initial project under the MN8-Eos Master Supply Agreement.
Shares of Eos Energy Enterprises (EOSE) rallied 12% on Wednesday following the company’s announcement of a strategic partnership with MN8 Energy and Google to develop a combined solar and energy storage facility in West Virginia.
Eos Energy Enterprises, Inc., EOSE
The facility will be constructed on a former coal mining site in Kanawha County. MN8 Energy has been designated as the owner and operator, with the project designated as Mammoth Solar.
The infrastructure integrates 86 MW of utility-scale solar generation with dual energy storage technologies. Eos will contribute 10 MW/100 MWh of its Z3 zinc-based long-duration storage solution, complemented by lithium-ion batteries delivering 70 MW/280 MWh of supplementary capacity.
The combined system aims to supply clean, dispatchable electricity to the PJM grid continuously, aligning with the energy demand patterns of Google’s regional data centers, including a forthcoming West Virginia facility.
Google has agreed to acquire all energy output, capacity rights, and renewable energy attributes from the facility. This initiative aligns with Google’s broader strategy to introduce additional generation capacity to the grids serving its operations.
Groundbreaking Deployment for Eos and West Virginia
This project represents Google’s inaugural use of Eos’ domestically-manufactured Z3 technology. Additionally, it serves as the first project to emerge from the previously disclosed MN8-Eos Master Supply Agreement.
The Z3 platform delivers 10 hours of energy storage capability, extending solar power availability well beyond what conventional lithium-ion configurations can achieve. The deployment also represents West Virginia’s first commercial-scale long-duration energy storage installation.
The solar component is slated for commercial operations by 2028. The lithium-ion storage system is scheduled to commence operations in 2029, while the long-duration Z3 technology will be activated in 2030.
Financial and Employment Benefits
The initiative encompasses an estimated capital expenditure reaching $350 million. Throughout its initial two decades of operation, the facility is anticipated to contribute approximately $4 million in property tax revenues to Kanawha County and area school districts.
The construction phase is forecast to generate roughly 200 employment opportunities, with additional permanent and temporary positions anticipated throughout the project’s operational lifecycle.
Eos operates its headquarters and manufacturing facilities in Pittsburgh, Pennsylvania, ensuring regional supply chain integration.
This agreement arrives as data center operators confront increasing demands to obtain dependable, renewable power sources. Google has been proactively expanding its investments in long-duration energy storage as a component of its comprehensive energy framework.
Nathan Kroeker, Chief Commercial Officer at Eos, commented that the Z3 platform “extends the value of clean generation across more hours, strengthens the overall portfolio, and delivers more dependable capacity when it’s needed most.”
MN8 CEO Jon Yoder noted the project demonstrates what becomes possible when a customer like Google is “willing to pair next-generation storage with utility-scale solar.”
The 12% gain in EOSE occurred on September 2, 2026, the day the partnership was publicly disclosed.
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