---
title: "Eos Energy wins Google-backed order for 100 MWh long-duration storage in West Virginia project"
type: "News"
locale: "en"
url: "https://longbridge.com/en/news/297781490.md"
description: "MN8 Energy selected Eos Energy to supply a 10 MW/100 MWh Z3 zinc-based long-duration storage system for the Mammoth Solar project in West Virginia. Google will purchase the energy, capacity, and clean energy attributes. This order marks Google’s first deployment of Eos’ Z3 technology and is the first project under the MN8-Eos master supply agreement. The solar facility is expected online in 2028, lithium-ion storage in 2029, and the Eos long-duration system in 2030."
datetime: "2026-09-02T11:59:27.000Z"
locales:
  - [zh-CN](https://longbridge.com/zh-CN/news/297781490.md)
  - [en](https://longbridge.com/en/news/297781490.md)
  - [zh-HK](https://longbridge.com/zh-HK/news/297781490.md)
generator: "portal-rs"
---

# Eos Energy wins Google-backed order for 100 MWh long-duration storage in West Virginia project

-   MN8 selected Eos to supply a 10 MW/100 MWh Z3 zinc-based long-duration storage system for the Mammoth Solar project in West Virginia. \* Project portfolio includes 86 MW solar, 70 MW/280 MWh lithium-ion storage; Google will buy the energy, capacity, clean energy attributes. \* Solar expected online in 2028; lithium-ion storage in 2029; Eos long-duration system in 2030. \* Order marks Google’s first deployment of Eos’ Z3 technology, first project under the MN8-Eos master supply agreement. Disclaimer: This news brief was created by Public Technologies (PUBT) using generative artificial intelligence. While PUBT strives to provide accurate and timely information, this AI-generated content is for informational purposes only and should not be interpreted as financial, investment, or legal advice. Eos Energy Enterprises Inc. published the original content used to generate this news brief via Business Wire (Ref. ID: 20260902424949) on September 02, 2026, and is solely responsible for the information contained therein. © Copyright 2026 - Public Technologies (PUBT)

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> **Disclaimer: This article is for reference only and does not constitute any investment advice.**