Field study of system efficiency of detached house with solar energy system and fuel cell cogeneration system in JapanRie Takaki, Hiroshi Yoshino, Hikaru Kobayashi, Akira Satake, Toshiki Hanabusa, Kenichi Konno and Kimio TakahashiE3S Web of Conf., 396 (2023) 03029DOI: https://doi.org/10.1051/e3sconf/202339603029