E22’s cost effective flow batteries are the best partner to make the renewable revolution a reality.

Our technology

Vanadium Redox Flow Batteries

Our Vanadium Redox Flow Batteries (VRFBs) are designed to be robust, bankable, cost effective, and long lasting batteries. E22’s flow batteries employ strong track record and proven experience in vanadium redox flow chemistry with an industrial optimization to reach reliability at the lowest cost.

VRFBs use a recyclable, chemically undegradable and non-flammable Vanadium-based electrolyte valid for unlimited cycles, and with a proven track record over 12,000 cycles of power with marginal maintenance cost.

Vanadium Redox Flow Battery (VRFB) by E22 Energy Storage Solutions


Flow batteries can provide a full range of power (kW) and energy (kWh) applications from the same unit: all-in-one. Vanadium Redox Flow Batteries can operate from short to long duration, including simultaneous operation for ramping and frequency regulation. The system provides the advantage of operation at full range of State of Charge, 100% net energy and no duty cycle limitation. In addition, with VRFB the risk is reduced as it is designed to be bankable.

A remarkable feature of VRFBs, is that power and energy are decoupled, which allows the maximum flexibility of the system.

No other technology can match the advantages of E22’s all-Vanadium Redox Flow batteries.

About us

E22 Energy Storage Solutions blends the perfect combination of enthusiastic young engineers with experienced experts in power generation, product engineering and construction.

As an integrated company, E22 appeared on the energy market scene towards the end of 2014, leveraging its engineering strengths and industrial capabilities.

To ensure our reliability, E22 products are verified and validated internally by recognized engineers and audited by third parties, all in conjunction with a flexible supply chain that includes our own BOP manufacturing facilities and competitive costs.

E22 Energy Storage Solutions container in our facilities in Valencia
Leyte photovoltaic plant at Phillippines uses E22 technology for Energy Storage

Our mission

We strongly advocate the energy transition towards decarbonization and an efficient supply to the final consumer, and therefore we provide our clients with storage solutions that are characterized by being resistant, profitable, durable, scalable and easy to build. he vanadium redox flow battery (VRFB) is our main technology and constant product development our maxim. Our products are designed to offer the lowest total cost of installation along with the highest safety (industry leading reliability).

    Contact us for more info!

    Calle El Collao, 20
    Polígono Industrial La Pahilla
    46370 Chiva (Valencia) Spain

    (+34) 917 364 248