Flow battery startup VFlowTEch banks $20.5M as ramp up continues

Singapore’s VFlowTech has secured a substantial $20.5M funding round to accelerate deployment of its vanadium redox flow batteries that aim to offer long-duration storage.

The company’s Powercube systems are available in 50 kW/250 kWh and 100 kW/500 kWh configurations, these units achieve 80% round-trip efficiency even at full 100% depth of discharge, a key performance metric for LDES economics. The company also uses its own energy management system (EMS) for varying charging profiles.

VFlowTech says the Powercube has a 25+ year lifespan and can operate at temperatures up to 55°C without cooling. The units support both AC and DC configurations, which could enable deployment from microgrids to utility-scale projects in its modular configuration.

“This funding gives us the ability to take on larger projects, expand into new markets, and integrate cutting-edge digital intelligence into our energy storage solutions, making them not just storage systems, but revenue-generating assets,” said Arjun Bhattarai, a co-founder of VFlowTech.

The funding was led by Granite Asia with participation from 10 other investors, including new investors EDBI, MOL PLUS and PSA Ventures and alongside existing backers Antares Ventures, İnci Holding, UntroD Capital, Pappas Capital, Wavemaker Partners, SEEDS Capital, and Entrepreneurs First.

The aim is to drive manufacturing scale-up while also funding advancements in membrane technology and vanadium recycling pathways, which remain key factors that influence the long-term cost trajectory of flow battery systems.

VFlowTech said it has deployments already spanning 10 countries, with a focus on Asia. Takuya Sakamoto, CEO of MOL PLUS, noted the regional attraction for their investment: “We find two attractions in VFlowTech. The first is that their technology has the potential to be deployed in larger-scale facilities, such as port terminals. The second is their focus regions are Southeast Asia and India where is also MOL’s focus.”

Michael Gryseels, founder and managing partner at Antares Ventures, added, “Over six years, the company has grown from a university research project into a leading innovator in long duration energy storage, driven by exceptional scientific talent and strong commercial execution.”