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Certain Energy
Formerly known as RFC Power | Low-cost, long-duration hybrid flow batteries for grid storage.
About Certain Energy
Certain Energy (formerly RFC Power) is a British long-duration energy storage company developing manganese flow batteries for grid-scale storage of renewable electricity. Spun out of Imperial College London in 2017 and led by CEO Tim von Werne with academic founders including Professors Nigel Brandon and Anthony Kucernak and Dr Vladimir Yufit, its patented hydrogen-manganese chemistry uses abundant, non-toxic materials and separates energy and power via external electrolyte tanks so duration can scale from hours to days. The company targets utilities, renewable developers and grid operators seeking lower-cost alternatives to vanadium flow and lithium-ion for multi-hour reserve and curtailment reduction, reporting design round-trip efficiency above 75% and long cycle life with limited degradation. In August 2026 Certain Energy raised a £10 million Series A led by the British Business Bank, with Centrica, Ceres Power Holdings and Temasek Trust's Catalytic Capital for Climate and Health (C3H), to build a grid-connected MWh-class system in India, expand UK facilities and prepare a commercial supply chain. Sources: Tech.eu 26 Aug 2026; British Business Bank; Imperial College London; Ceres Power.
Source: Dealroom company dataAt a glance
- Status
- Operational
- Founded
- 2017
- Headquarters
- London, United Kingdom
- Employees
- 5
- Open positions
- None listed
- Dealroom signal
- 60.9/100
- Sub-industry
- Energy Storage
- Sector
- Energy, Battery, Spinout, Sustainable Development Goals, Climate Tech, Hard Tech, EIT Ecosystem, Horizon Europe, DT and LS, UKis manufacturing, uk is8 advanced manufacturing
- Technology
- Deep Tech
- Business model
- Manufacturing
- Client focus
- b2b
Knowledge graph
More headlines
Funding history
Company financing events and reported valuations.
| Deal type | Date | Amount | Valuation | Investors | Source |
|---|---|---|---|---|---|
| SERIES A✓Equity / VC | Aug 2026 | $13M | $53M | Centrica · Ceres · Catalytic Capital for Climate and Health · British Business Bank | ↗ |
| SUPPORT PROGRAM✓Other financing | Feb 2023 | $0 | — | Rockstart · Ørsted | ↗ |
Growth signals
Latest recorded traffic for Certain Energy is 2.2K monthly website visits, down 29% over the last three months. Certain Energy's team declined 44.4% over the past year.
Similar companies
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Investments and acquisitions
Recent portfolio relationships for companies that also act as investors or acquirers.
Investors
From Dealroom's funding and investor records, grouped by the round each investor first entered.
Seed2 investors entered at this stage
EIT Climate KIC
IP Group
Series A4 investors entered at this stage
British Business Bank
Centrica
Ceres
Catalytic Capital for Climate and Health
Other known investors7 additional known investors
Ørsted
Rockstart
Imperial College London
Energy Catalyst
New Energy Challenge
REPSOL Foundation
Royal Academy of Engineering Enterprise Hub
Source: Dealroom Talent Intelligence.
Global footprint
team presence
Market sentiment
An AI-synthesised read of the highest-engagement posts about Certain Energy on X, ranked by likes and reposts, corporate channels excluded.
Reading the room on X — pulling top posts and synthesizing themes…
Source: X recent search ranked by engagement (likes + retweets) · Synthesis by Claude · Cached for 1 hour
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