A study of a hybrid type stand-alone 3 kW photovoltaic system of Karakalpak state universityK.M. Reymov, Sh.M. Esemuratova, B.M. Khusanov and A.V. MytnikovE3S Web of Conf., 384 (2023) 01047DOI: https://doi.org/10.1051/e3sconf/202338401047