Google Plans to Build Mammoth Solar Farm on an Abandoned Coal Mine. This Penny Stock Just Won the Deal.

Google Plans to Build Mammoth Solar Farm on an Abandoned Coal Mine. This Penny Stock Just Won the Deal.

Omor Ibne Ehsan

Thu, September 10, 2026 at 6:54 PM GMT+3 3 min read

• EOSE -1.00%
• GOOG +1.53%

Alphabet (GOOG) (GOOGL) has been on a shopping spree over the past few months, even though it has been quiet about releasing competitive AI models. Eos Energy (EOSE), MN8 Energy, and Google are now collaborating to build the "Mammoth Solar" project in Kanawha County, West Virginia.

It carries a total capital investment of up to $350 million, with Google purchasing the energy, capacity, and clean energy attributes from the facility. This will power Google's data centers in the region, especially an upcoming facility in West Virginia.

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Eos Energy Enterprises is a major beneficiary of this project, and EOSE stock is ~$4 as of this writing, with a $1.5 billion market cap. In the AI space, that market cap is still small and can lead to multibagger returns.

How Eos Benefits From This Project

The Mammoth Solar project will combine 86 MW of utility-scale solar with two layers of battery storage: 70 MW / 280 MWh of lithium-ion and 10 MW / 100 MWh of Eos' Z3 zinc-based long-duration energy storage. The lithium-ion handles shorter-duration needs, while Eos' system is designed to discharge over 10 hours.

This is Google's first project using Eos' Z3 technology, and considering how high the demand is for anything AI-related, it might not be the only one. Eos is getting a hyperscaler to deploy its product at commercial scale, and it can lead to Eos inking more deals down the line with Google's peers and competitors.

It's also the first project under the 750 MWh master supply agreement that MN8 and Eos signed in October 2025. That agreement covers multiple future deployments across the PJM grid and other U.S. markets, meaning the West Virginia project is a starting point, not a one-off. If it performs, there's a pipeline behind it.

Why EOSE Stock Looks Ugly When You Zoom Out

Battery and energy stocks have always been capital-intensive without significant demand since the EV boom in 2021. AI may revive that demand, but it could take much longer.

EOSE traded near $18 as recently as late 2025 and fell more than 80% before the Google deal. It becomes pretty obvious why the stock fell so much when you look at the financials. Revenue did increase from $5 million in 2021 to $114 million in 2025, but net losses ballooned from $124 million to $970 million during the same stretch. For a company of this size, it's impossible to finance these losses without taking on significant debt and diluting shareholders.

Hence, net debt is now at $266 million, with outstanding shares rising by ~6 times in the past five years alone.

Is EOSE Stock a Buy Now?

I don't think so. The deal is still too small to make a life-changing difference for this business until other hyperscalers follow suit. And even if hyperscalers get more interested in solar power and batteries, it could take years until the rally starts to spill over meaningfully into names like EOSE.

Losses are simply too high to chase this stock, and every dollar of revenue this company squeezes out might bring another $5-10 in losses. Those losses are going to cause you more pain in the stock market. It's not worth leaping on a solar battery company when you have plenty of other data center and AI bets in the stock market with profitability pathways, while trading at a lower market cap.

On the date of publication, Omor Ibne Ehsan did not have (either directly or indirectly) positions in any of the securities mentioned in this article. All information and data in this article is solely for informational purposes. This article was originally published on Barchart.com