F. A. M. Shukor, H. Zainuddin, N. Muhammad, and F. L. M. Khir, “Acceptance Ratio Analysis: An Early Fault Indicator for Grid-Connected Photovoltaic System”, Int. J. Adv. Sci. Eng. Inf. Technol., vol. 11, no. 3, pp. 1214–1223, Jun. 2021.