Satria, H., S. Syafii, and A. Aswardi. “Analysis of Peak Power Capacity on Rooftop Solar PV 1.25 KWp at Sun Conditions 90 Degrees”. International Journal of Electrical, Energy and Power System Engineering, Vol. 4, no. 3, Oct. 2021, pp. 173-8, doi:10.31258/ijeepse.4.3.173-178.