January 9, 2026: China’s Rongke Power has confirmed the start of operations of a gigawatt-hour scale vanadium flow battery energy storage facility.

The Jimusaer project, in China’s Xinjiang autonomous territory, provides a total installed capacity of 200MW/1,000 MWh, enabling up to five hours of continuous discharge to support long-duration energy storage for utility-scale grid operation, Rongke said.

Designed for intensive daily cycling, the system — which Rongke claimed as a world first in terms of GWh scale for a vanadium flow battery — supports large-scale renewable energy integration and enhances overall grid flexibility.

The BESS is integrated with a 1GW photovoltaic power plant, allowing surplus renewable generation to be stored during periods of high output and dispatched during peak demand.

Rongke said the renewable and storage system combined increases renewable energy utilization by more than 230 million kWh annually, reducing curtailment and improving overall system efficiency.

Founded in 2008, Rongke has become a leading developer of vanadium flow battery technology for long-duration energy storage solutions for utility-scale and industrial applications.

Rongke opened a facility in 2016 to produce vanadium flow battery modules in China. The plant had a reported production capacity then of up 300MW/1200MWh a year.

The company said it has deployed more than 3.5GWh of vanadium flow battery systems worldwide to date.