Jimusar 200 MW / 1 GWh Vanadium Flow Battery by Rongke Power: status and timeline

Milestones

No announced next step

Construction completedJun 2025Complete.
System reached full capacity and began operationDec 2025Complete.

Most important updates

Jimusar 200 MW / 1 GWh vanadium flow battery system begins operation in XinjiangJan 2026

Current obstacles

Vanadium resource constraintsGlobal vanadium refining capacity limits the speed of deployment; supplies are concentrated in a few countries and tied to other industries.

Physics limits

Energy efficiency penaltyVanadium flow batteries achieve 75–90% round-trip efficiency; energy is lost as heat and in parasitic draw from pumps and power electronics.
Capital cost per MWhFlow batteries require large tanks of electrolyte, making per-MWh capital cost higher than lithium for short-duration applications, though vanadium lasts 20+ years without degradation.

How it works

3 parts

Vanadium tanks

Two electrolyte reservoirs store energy

Charged and discharged vanadium ions are kept in separate tanks. During discharge, ions flow across a membrane in a fuel-cell-like stack, creating electricity.

Five-hour window

Large electrolyte volume extends duration

The 1,000 MWh capacity comes from large tanks of vanadium electrolyte. Discharging at 200 MW drains the tanks over five hours, ideal for daily solar cycles.

Grid integration

Paired with solar to absorb daily peaks and fill gaps

The battery absorbs midday solar overproduction and releases power in early morning and evening, reducing the need to curtail or waste renewable energy.

Spec sheet

Spec	Jimusar 200 MW / 1 GWh Vanadium Flow Battery
Power output	200 MW^R (reported)
Energy capacity	1,000 MWh^R (reported)
Discharge duration	5 hours^R (reported)
Co-located solar capacity	1,000 MW^R (reported)
Total investment	CNY 3.8 billion ($520 million)^R (reported)
Land area	1,870 hectares^R (reported)

^R reported by the company

Update log

1 update

Jan 2026

Major: Jimusar 200 MW / 1 GWh vanadium flow battery system begins operation in XinjiangPressManufacturing

About Rongke Power

The team behind Jimusar 200 MW / 1 GWh Vanadium Flow Battery

Rongke Power

Vanadium flow batteries, grid storage

Rongke Power specializes in vanadium redox flow batteries for grid-scale storage. Its technology powers Jimusar, the world's largest vanadium flow battery system (200 MW / 1 GWh), which reached full power in December 2025.

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.

rkpstorage.com (opens rkpstorage.com)Company profile →

Founded: 200818 yrs
Headquarters: China
Status: Private
Valuation: private
Works in: EnergyGrid storage
Coverage: 1 program · 1 updatelatest 1 Jan 2026checked 11 Oct
Customers: Huaneng Xinjiang Jimusar Power (opens chinahuaneng.com)PowerChina Northwest Engineering (opens powerchina.cn)

Spec

Jimusar 200 MW / 1 GWh Vanadium Flow Battery

Power output

200 MW^R (reported)

Energy capacity

1,000 MWh^R (reported)

Discharge duration

5 hours^R (reported)

Co-located solar capacity

1,000 MW^R (reported)

Total investment

CNY 3.8 billion ($520 million)^R (reported)

Land area

1,870 hectares^R (reported)