Key Findings
Certain Energy (formerly RFC Power), a UK-based energy storage technology startup, has successfully raised £10 million (approximately $13.6 million) in its Series A funding round. This crucial capital infusion is set to accelerate the commercialization and large-scale deployment of its proprietary manganese flow battery technology in the UK and international markets. Through this innovation, Certain Energy aims to deliver groundbreaking long-duration energy storage solutions that can effectively meet fluctuating energy demands and alleviate existing grid constraints.
Technical Details and Product Advantages
The core of Certain Energy’s technology is a manganese flow battery that utilizes abundant manganese as the primary active material in its electrolyte. This approach is claimed to reduce material costs by approximately tenfold compared to existing vanadium redox flow batteries. While vanadium is a rare earth metal with limited supply and volatile pricing, manganese is far more widely distributed, similar to cobalt, nickel, and lithium, offering superior sustainability and cost stability. Manganese flow batteries retain the inherent characteristics of flow batteries, where energy capacity and power output can be independently scaled, making them particularly well-suited for long-duration energy storage applications lasting from several hours to multiple days. The secured funds will be strategically invested in developing an MWh-scale grid-connected demonstration system in India, expanding the company’s research and development facilities in the UK, and establishing a robust supply chain to support mass production.
Background and Industry Context
The global expansion of intermittent renewable energy sources, such as solar and wind power, is driving an urgent need for long-duration energy storage (LDES) solutions to compensate for their variability. Traditional lithium-ion batteries, which are predominantly short-duration, face significant cost and efficiency challenges when scaled for multi-hour or multi-day storage. Flow batteries have emerged as a promising technology to bridge this LDES gap, but vanadium-based systems have historically struggled with high material costs. Certain Energy’s manganese flow battery has the potential to dramatically lower this cost barrier, representing a significant breakthrough that could accelerate LDES market adoption. This provides an economically and environmentally sustainable option for supporting the energy transition and enhancing grid resilience.
Future Outlook and Strategic Significance
This recent funding and the accelerated technological development are critical for Certain Energy to establish itself as a key player in the nascent LDES market. The successful deployment of the MWh-scale system in India will serve as a vital milestone for broader global expansion. Low-cost, manganese-based flow batteries have the potential to significantly reduce the integration costs of renewable energy, enabling widespread large-scale deployment, including in developing nations. Certain Energy is expected to contribute substantially to a sustainable future by providing essential solutions for grid decarbonization and stabilization.
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