2021 Volume 46 Issue 4 Pages 233-242
The hydrogen-based autonomous energy supply system “H2One” that can provide stable electric power using renewable energy has been developed. Since the first unit started into operation in April 2015, several variations of the model were put into operation in total 14 systems so far September 2021. Regarding the concept of H2One, that can supply CO2-free energy by local production for local consumption, various developments such as large-scale systems in off-grid areas of remote islands, and small-scale models for detached domestic houses are examined on simulation basis. The hydrogen storage technologies for the H2One system are also described.