Fourth Power logo — Energy Storage that Grows with the Grid

Fourth Power

Energy Storage that Grows with the Grid

Founded 2021 United States Cambridge, United States 35 employees Series A Total: $19.00M Energy, Renewable Energy +1

General Information

Company Name Fourth Power
Founded Year 2021
Location United States Cambridge, United States
Employees 35
Industries Energy, Renewable Energy, Energy Storage
Funding Stage Series A
Business Model B2B, B2G
Revenue Model Project Based, Tiered Pricing, Usage Based
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About Fourth Power

Fourth Power is making significant strides in the energy sector with its innovative thermal battery technology. Founded in 2021 and headquartered in the United States, the company focuses on transforming renewable energy into an on-demand source via utility-scale thermal storage. These technological advancements can capture wasted wind and solar production, making renewable energy as cost-effective as fossil fuels.

The company's modular battery systems offer flexibility in storage capacity, ranging from 5 to 10 hours, and can expand to meet demands up to 100 hours. This adaptability allows Fourth Power to align with grid needs, providing both short- and long-duration energy storage (LDES), making it an attractive candidate for investors looking to back sustainable energy solutions.

The recent $19.00M Series A investment from renowned investors such as DCVC, Breakthrough Energy Ventures, and the Black Venture Capital Consortium underscores the growing confidence in Fourth Power's potential to lead in renewable energy storage. Their slogan, "Energy Storage that Grows with the Grid," encapsulates their mission to innovate within the energy landscape, promising cost savings for consumers and a move towards a cleaner energy future.

Business keywords: Thermal Battery, Energy Storage, Grid Storage, Thermal Storage, Utility-Scale Storage, Long-Duration Energy Storage, Industrial Heat, Clean Energy, Modular Battery, On-Demand Energy, Cost-Competitive, Wind Energy, Solar Energy, Fossil Fuel Alternative

Services & Products

Thermal energy storage systems
Utility-scale energy solutions
Flexible grid-scale storage solutions

Target Customers

Utility companies Energy infrastructure developers Renewable energy sectors Government energy agencies

Funding Rounds & Investors (1)

View All
Funding Stage Amount Investors Lead Investors Date
Series A $19.00M 3
DCVC, Breakthrough Energy Ventures +1
12 Dec 2023

Fourth Power Alternatives & Competitors

View All Alternatives
Fourth Power vs
TerraStor
TerraStor United States

Grid-scale Energy Storage for a Carbon-Free Future

Seed
2 employees
Energy, Energy Storage
Fourth Power vs

Bridging the energy gap - Maximizing value

Acquired
14 employees
Energy, Renewable Energy
Fourth Power vs
Form Energy
Form Energy United States

Energy Storage for a Better World

Series G
847 employees
Energy, Renewable Energy

FAQ About Fourth Power

Energy Storage that Grows with the Grid
Fourth Power was founded in 2021.
Fourth Power is headquartered in Cambridge, United States.
Fourth Power operates in Energy, Renewable Energy and Energy Storage. Its work centres on Thermal Battery, Energy Storage, Grid Storage and Thermal Storage. Its customers include Utility companies, Energy infrastructure developers and Renewable energy sectors.
Fourth Power has a B2B and B2G business model. Its revenue comes from Project Based, Tiered Pricing and Usage Based.
Fourth Power has approximately 35 employees.
Fourth Power has completed 1 funding round, raising a total of $19.00M. The latest funding stage is Series A.
Fourth Power offers: Thermal energy storage systems, Utility-scale energy solutions, Flexible grid-scale storage solutions.
Top alternatives and competitors to Fourth Power include TerraStor, VoltStorage, Form Energy, Ore Energy, Peak Energy. These companies operate in related industries and serve comparable markets. You can compare them side by side on Bounce Watch.
Fourth Power and TerraStor are both companies in similar industries. Compare their funding, team size, growth signals, and market position on Bounce Watch to see which one fits your needs.

Source: BounceWatch company record for Fourth Power, https://bouncewatch.com/company/fourth-power, updated 20 July 2026. When citing, please name BounceWatch and link this page.

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