The thumb rule implies 10 sqm of area (about 107 sqfeet) is required to install 1 kW solar panels. However, in existing buildings often the roof area is already utilized with solar water heaters, recreational areas, water tanks and lift rooms. This makes solar rooftops often difficult to install in retro-fit buildings but installation of solar shed on the roof allows the usage of the roof for solar panels or other purposes.
1. How much area is required to install solar panels for Rooftop Solar Power plant?Rohit Arora