Abstract
We have proposed the energy networks which carries out the cross-supply of electricity, hot water, and hydrogen for effective use of fuel cell systems. By simulation and operations of experiments in laboratory, we continued evaluating effects of energy networks. We started the demonstration in residential homes from this year. The demonstration system includes three PEM and hydrogen generator and plural experiments for (1) a group of detached houses in a part of residential area, and (2) an apartment building are enabled.