Faiyz Uddin, K., Iqbal, J. and Amjad, S. 2022. Return on Investment (ROI) Analysis of OFF-Grid Solar Photovoltaic System in Residential Sector of Pakistan. Journal of Sustainable Environment. 1, 1 (Jun. 2022), 1-16. DOI:https://doi.org/10.58921/jse.01.01.014.