Certain Energy

Energy Storage · Energy & Utilities

Overview

We are developing the world’s lowest cost flow battery. Our mission is to enable the transition to 100% renewable energy by developing the cheapest form of long duration energy storage.

Funding and backers

Total raised
$13M
1 round on record
Latest round
$13M
Series A · Aug 2026 · 2 mo ago
Backers
1
Imperial College London
The money's age
Fresh money
2 months since the last round · not hiring
Momentum
20/100
fresh money
The story so fareach stage dated by its source: the company's releases, the press, registers, filings
Oct 2026 Formerly RFC Power Limited (rfcpower.com) Aug 26 Raised a round Series A $13M
Funding rounds
RoundDateAmountInvestorsSource
Series A Aug 2026 $13M — startuprise.co.uk
Registers and programsofficial lists and records that name the company
Legal entity Certain Energy RFC Power Limited its site
Backed byfrom the funds' portfolios and accelerator catalogs

Financials

Total raised
$13M
Latest round
Series A
Funding rounds
1
Funding rounds
Round Announced Amount
Series A 2026 $13M Details

Connections

List
Graph
Found in company registers, site code, DNS and hiring. Each connection shows how sure we are and the evidence, with its source and date.
Shared investors1
74 portfolio companies: TympaHealth, Vanadion Ltd, Zoompast Limited and 71 more