Stimulation of investment processes in renewable energy sector Nataliia Savina, Yevheniia Sribna, Volodymyr Yemelyanov, Svitlana Dombrovska and Dmytro Mishchenko E3S Web Conf., 255 (2021) 01048 Published online: 03 May 2021 DOI: 10.1051/e3sconf/202125501048