The brief

Analyst view

• World's largest vanadium flow battery: 1,000 MWh in Jimusar, Xinjiang, paired to 1 GW solar.
• Vanadium redox achieves 75–90% efficiency, 12,000+ cycles, 20-year life for long-term grid storage.
• Jimusar: $520M investment enables 230 GWh additional yearly renewable use by cutting curtailment.

Technical approach

As reported

Vanadium redox chemistry

Four oxidation states enable reversible reactions

Vanadium's four oxidation states allow one element to work as both electrodes, enabling full reversibility and long cycle life.

Decoupled power and energy

Scale storage independently of power output

Flow batteries separate MW from MWh in different systems, so you can extend discharge time without increasing power, unlike coupled batteries.

Long-duration storage

Hours of storage, not minutes

Jimusar's 1,000 MWh at 200 MW gives five hours of discharge, critical for balancing daily solar and wind swings.