Start-up unveils 25kW precious metal-free alkaline electrolyser with 74% efficiency

Swedish hydrogen electrolyser start-up HyMeth has unveiled a new 25kW precious metal-free alkaline system with up to 74% overall stack efficiency while also reducing costs, size and weight.

In 2023, the Malmo-based firm delivered a 5kW system, which achieved 67% efficiency, to Nilsson Energy (now Hydri) for testing in Gothenburg.

Now, however, HyMeth says the larger 25kW stack has achieved a 4-10% efficiency improvement, bringing its overall efficiency to between 70 and 74%.