Ahmed, A., Kazmi, S.A., Anwar, M. and Waqas, A. 2023. Comparison of Techno-Economic Models for Upgrading PV System without Net-Metering Option and Long Term Impact on Energy Bills. Pakistan Journal of Engineering and Technology. 6, 3 (Oct. 2023), 16-24. DOI:https://doi.org/10.51846/vol6iss3pp16-24.