Muhammad Dwi Fadil Thio, Acha Fillail Romadhoni, Dela Ainun Nisya, Hesti Maheswari and Arif Murti Rozamuri 2021. Empowerment of Semi Formal and Informal Sector in Realizing A Cheap and Environmentally Friendly Alternative Energy of PLTSa Sumur Batu Business Process. Journal of Management and Energy Business. 1, 1 (Nov. 2021). DOI:https://doi.org/10.54595/jmeb.v1i1.14.