Water electrolyzer for renewable energy systems V. N Kuleshov, N. V Kuleshov, S. V Kurochkin, A. A. Fedotov, E. E. Sleptsova, D. V Blinov, A. A. Gavriluk and I. E. Zhmurko E3S Web Conf., 289 (2021) 05004 Published online: 13 July 2021 DOI: 10.1051/e3sconf/202128905004