An Approach Towards a Sustainable Urban City - Utilization of Existing Rooftop Solar Energy Panels by Making Use of DC Appliances. - Ashir Hamim Rifat; Muckbul Hossain; Rifatul Islam Abir; Shoud Noman; Tahmidul Ashraf; A. K. M. Abdul Malek Azad (GHTC, 2021)