Different, but

We rely on redox flow storage technology for our batteries. A technology that is fundamentally different from conventional storage technologies. Redox flow technology is eco-friendly, safe and extremely durable. It allows green energy to be optimally stored and accessed around the clock.

Why store environmentally friendly energy in an environmentally unfriendly way?

For the energy transition to succeed, we need eco-friendly and scalable energy storage systems for a wide range of applications. The predicted demand for batteries is gigantic, and the available technologies are limited in their possibilities.

Currently, solutions based on scarce resources that are mined under questionable conditions dominate the market. VoltStorage's batteries are based on redox flow technologies which rely on raw materials that are widely available worldwide. Together with our international team of experts, we have continuously developed this resource-saving storage technology over the past few years and scaled and optimized it for use as Long Duration Energy Storage.

Function and construction of a redox flow battery

Batteries based on redox flow technology differ fundamentally from conventional storage technologies such as those based on lithium & Co. A characteristic feature of a redox flow battery is the storage of electrical energy in a liquid electrolyte solution.

These batteries are particularly climate-friendly, as they do not require rare earths and conflict raw materials, are fully recyclable and are also characterised by high operational reliability and a long service life.

  • 01
    Eco-friendly: no use of rare earths or conflict raw materials
  • 02
    Long-lasting: more than 10,000 charging cycles without loss of storage capacity
  • 03
    Safe: storage media consists of non-combustible components
  • 04
    Flexible: power and capacity can be scaled independently of each other
  • 05
    CO2-saving: Proven CO2-saving and sustainable battery technology
Electrolyte The storage medium is a liquid electrolyte that is stored in two separate tanks.
Battery stack The battery cells each consist of two half-cells separated by an ion-permeable membrane.
Pumps A special pumping system transports the electrolyte through the battery cells and is only activated when needed.

The flow principle

A redox flow battery consists of two tanks, a pump system and battery cells, also called battery stack. The two tanks contain a liquid electrolyte solution that serves as a storage medium. The electrolyte is pumped through the battery cells to charge and discharge the battery, thereby binding electrons. The amount of electrolyte determines the capacity, the number of battery cells in turn determines the power. In this way, the power and capacity of a redox flow battery can be scaled independently of each other.

Concentrated expertise and passion for different application areas

Since our founding in 2016, we have been developing and producing pioneering battery solutions that are particularly resource-efficient, cost-effective and eco-friendly. With our international team of experts, we have continuously developed redox flow storage technology in recent years and scaled and optimized it for various industries. In doing so, we rely on a multi-technological approach to cover all application areas of stationary battery storage systems.

That´s base load


Designed for use as a Long Duration Energy Storage System, the Iron Salt Battery from VoltStorage enables you to bridge supply gaps in times of low wind and sunshine and thus provide the base load from renewable energies.