Form Energy

Form Energy

Weirton, West Virginia, United States

Energy Storage
Founded 2017501-1000 employees
Profile last updated: May 6, 2026

About

Founded in 2017, Form Energy is a renewable energy company headquartered in Weirton, United States with approximately 501-1000 employees specializing in Energy Storage.

Form Energy is an American technology company developing, manufacturing and commercializing multi-day iron-air battery energy storage systems designed to support a reliable, clean and affordable electric grid. Its first commercial product stores and discharges energy for up to 100 hours, using low-cost, abundant materials such as iron, water and air. The company also offers Formware, a grid modeling software tool for utilities and grid planners. Form operates a high-volume battery manufacturing plant, Form Factory 1, in Weirton, West Virginia, plus R&D and engineering facilities in Somerville, Massachusetts and Berkeley, California, and a pilot manufacturing facility in Eighty-Four, Pennsylvania. Founded in 2017, it is headquartered in the United States and has begun expanding internationally, including a project in Ireland.

Headquarters

Weirton, United States

Founded

2017

Employees

501-1000

Focus areas

energy storageiron-air batterymulti-day storagelong duration energy storagegrid modelingmanufacturingFormware

Products & services

Business models

B2B

Value chain

R&DManufacturingEngineering

Service areas (1)

  • Multi-day energy storage

    Designs, manufactures and deploys iron-air batteries providing up to 100 hours of grid-scale storage, and grid modeling software (Formware) for utilities and developers.

Locations

Headquarters

Iron Way 26, 26062, Weirton, West Virginia, United States

Operating locations (2)

  • Dane St. 30, Somerville, Massachusetts, United States
  • Heinz Ave. 793, Berkeley, California, United States

Service regions

United StatesIreland

Projects

5

Great River Energy multi-day storage demonstration

Under ConstructionIron-air battery storage

First commercial demonstration of Form Energy's iron-air battery system with Great River Energy, with the full project expected online in 2026.

1.5 MW capacityUnited StatesClient: Great River Energy

Xcel Energy iron-air battery project

PlannedIron-air battery storage

Announced 300 MW / 30 GWh iron-air battery project to help power a Google data center in Minnesota.

300 MW capacityUnited StatesClient: Xcel Energy

Maine multi-day storage project

PlannedIron-air battery storage

85 MW / 8,500 MWh energy storage project selected by the U.S. Department of Energy.

85 MW capacityUnited States

Georgia Power storage project

PlannedIron-air battery storage

Signed agreement on a 15 MW project with Georgia Power.

15 MW capacityUnited StatesClient: Georgia Power

FutureEnergy Ireland storage project

PlannedIron-air battery storage

First international deployment: a 10 MW / 1,000 MWh iron-air battery system in northwest Ireland.

10 MW capacityIrelandClient: FutureEnergy Ireland

Credentials & affiliations

Awards

Top Climate Tech Company to Watch

MIT Technology Review2023

Top Climate Tech Company To Watch

MIT Technology Review2024

Next Big Things in Tech

Fast Company2023

Most Innovative Companies

Fast Company2025

Top Greentech Companies

TIME2024

Top Greentech Companies

TIME2025

Best Startup Employers

Forbes2024

Best Startup Employers

Forbes2025

Top Private Deep Tech Companies

XB1002023

Best Inventions

TIME2023

CLEANTECH Global Top 100

Cleantech Group2022

100 People Transforming Business in North America

Business Insider2020

Industry memberships

LDES Council

Partnerships

Xcel Energy, Great River Energy, Georgia Power, Dominion Energy, Crusoe, FutureEnergy Ireland, Weirton Area Museum and Cultural Center, Google

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