Vertical Axis Wind Turbine Improvement using DC-DC Boost Converter Khairunnisa Khairunnisa, Syaiful Rachman, Edi Yohanes, Awan Uji Krismanto, Jazuli Fadil, Soedibyo Soedibyo, Mochamad Ashari and Mahmoud Abuzalata E3S Web Conf., 188 (2020) 00017 Published online: 08 September 2020 DOI: 10.1051/e3sconf/202018800017