VoltStorage unveils vanadium redox flow battery for commercial use


From pv magazine Germany

Germany battery manufacturer VoltStorage has unveiled a 50 kWh vanadium redox flow battery that is designed to optimize self-consumption in commercial and industrial PV systems

The VoltStorage VDIUM C50 is an AC-coupled battery with a system voltage of 48 V. The manufacturer offers a 20-year guarantee on the electrolyte and promises that it will degrade less than 0.3% per year.

It also offers a five-year guarantee on the power electronics. The new product comes in a common container and weighs 2 tons without the electrolyte. When fully filled, it weighs 6.5 tons. The electrolyte pumps and power electronics consume 40 W in standby mode.

The system can be cascaded in a 10-unit configuration and reach a total capacity of 500 kWh. The discharge capacity is 9 kW. At full power, the system is empty after six hours.

The manufacturer said that the system, thanks to the redox technology, can achieve a depth of discharge of 100%. When charging the system, operators should plan six hours for 80% and nine hours for 100%. At 10 kW, the charging power is slightly higher than the discharging power.

VoltStorage also said the system features an IP54 protection rating. It recommends installing it in an outdoor environment.

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