Regenerative Energy Storage System for Space Exploration Missions Ivar Wærnhus, Crina S. Ilea, Arild Vik, Dimitrios Tsiplakides, Stella Balomenou, Kalliopi Papazisi and Max Schautz E3S Web Conf., 16 (2017) 10005 Published online: 23 May 2017 DOI: 10.1051/e3sconf/20171610005