VFT FlowOne, FlowMax and FlowFlex Vanadium Flow Batteries

VFlowTech (VFT) is a Singapore deep-tech company spun off from Nanyang Technological University in 2018 by Dr Avishek Kumar and Dr Arjun Bhattarai. It builds vanadium redox flow battery systems for long-duration storage, addressing the gap left by lithium-ion batteries that usually cover four hours or less and degrade over time.

The product line runs from FlowOne (100 kW / 500 kWh in a 40-foot container) and FlowMax (500 kW / 2-3 MWh stacked containers) to FlowFlex, a site-specific design from 1.5 MW / 7.5 MWh upwards. A patented HeatShield electrolyte allows operation up to 55 degrees Celsius without active cooling, and a cloud energy management platform supports monitoring. Target users are utilities, data centres, ports, mining and oil and gas sites.

• FlowOne: all-in-one 100 kW / 500 kWh container for C&I needs below 2,500 kWh.
• FlowMax: stacked containers of 500 kW / 2-3 MWh with up to 36 kWh per square metre.
• FlowFlex: custom architecture for projects of tens to hundreds of MWh.
• HeatShield electrolyte: stable operation up to 55 degrees Celsius without active cooling.
• Vanadium recovery: patented process to recover vanadium from petcoke cinder.
• Cloud platform: CEMP portal for monitoring registered systems.

Industrial parks in Vietnam can pair rooftop solar with a FlowMax system to shift output into evening peaks. Data centres can use long-duration flow batteries for resilience without lithium fire risk. Island and remote sites can replace part of diesel generation with solar plus flow storage.

The company states a lifespan of more than 30 years and over 20,000 cycles with zero capacity fade, so no augmentation is needed. It claims 30% higher throughput energy than lithium-ion BESS, lowering levelised cost of storage. The aqueous electrolyte is non-flammable, and the vanadium can be recovered at end of life.

As solar and wind shares rise, grids and large users need storage lasting longer than four hours, and hot tropical climates penalise lithium-ion cooling loads. Southeast Asian data centres, ports and industrial zones are looking for non-flammable, long-life storage that can sit close to critical assets.

NTU spin-off founded in 2018 in Singapore. Raised USD 20.5 million in 2025 in a round led by Granite Asia. Reports more than 30 deployments across 12 countries, including PowerCube systems on Pulau Ubin and Jurong Island.