In addition to the generic advantages of the flow battery principle and the choice for hydrogen and bromine, Elestor’s proprietary system design includes a number of unique properties:
- The system does not require a H2 compressor to generate pressure during charging. A H2 compressor is costly, consumes electrical energy and requires maintenance. The Elestor cells are designed in such a way that, up to a certain level, pressure can be built up without a separate H2 compressor.
- Based on a well-considered design, the Elestor stacks are simple yet robust. The stacks are easy to manufacture and already in the design phase, high production volumes are anticipated.
With Elestor’s patented stack design manufacturing costs are reduced, having an additional positive effect on the storage costs per kWh.
The Elestor system design shows a much higher resemblance with a mechanical ‘machine’ rather than with a closed ‘battery pack’. All parts (stacks, circulation pumps, valves, control electronics etc.) are easily accessible. Therefore, these systems can always be serviced and upgraded, in contrary to the typical closed battery packs of traditional storage technologies.
Furthermore, exchange of stacks after 10,000 cycles gives a system a full second life. This leads to an additional reduction of storage costs per kWh and bottom line to a further enhanced return on investment.