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Certain Energy

London, United Kingdom

series-a$12.8M raisedFreshly fundedClimate TechEnergy StorageClean Energy

Total Raised

$12.8M

Stage

series-a

Location

London, United Kingdom

Founded

2017

Team size

11-50

Links

About Certain Energy

A long-duration energy storage startup developing manganese flow battery technology for grid-scale deployment.

What sets it apart

Patented hydrogen-manganese chemistry aims to deliver very low-cost, non-toxic, long-duration storage with a lower levelized cost than vanadium and lithium-ion alternatives.

Sectors

Climate TechEnergy StorageClean EnergySemiconductors

Business

Modelhardware

CustomerUtilities, grid operators, and energy developers deploying grid-scale long-duration storage

Notable

  • Spun out from Imperial College London in 2017
  • Achieved 1 kW of continuous discharge power in 2022
  • Expanded partnership with Ceres Power to accelerate commercialization
  • Built on patented hydrogen-manganese chemistry with globally patented core technology

Funding rounds

series-a$12.8M

26 Aug 2026

Led by British Business Bank

With Centrica Energy, Ceres Power Holdings plc, Temasek Trust's Catalytic Capital for Climate and Health (C3H)

Source ↗

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FAQ

What does Certain Energy do?

A long-duration energy storage startup developing manganese flow battery technology for grid-scale deployment.

Where is Certain Energy based?

Certain Energy is based in London, United Kingdom, founded in 2017.

How much has Certain Energy raised?

Certain Energy has raised $12.8M in tracked funding and is currently at the series-a stage.

Who has invested in Certain Energy?

Investors in Certain Energy include Ceres Power, IP Group, Kiko Ventures, VeniSIA Accelerator and Repsol Foundation Entrepreneurs Fund.