Performance analysis of solar rooftop systems based on racking arrangements in humid subtropical areas

Modern engineers find it often challenging to select an energy-efficient racking and the associated solar systems to harness maximum energy from the solar irradiance over a fixed rooftop area. Eight different solar rooftop systems are simulated in a software-based environment to find an optimal racking design associated with the solar design for a humid subtropical area within Guwahati city. Four different rackings (fixed-tilt, flush-mount, East-West and carport rackings) are arranged in horizontal and vertical orientations to measure the performance of these solar systems and identify the most efficient solar rooftop system in humid subtropic areas. Simulational analyses reveal that fixed-tilt, flush and carport systems arranged in vertical orientation can accommodate the maximum number of solar modules and frames and generate maximum AC and DC power of 48.1 kW and 59.2 kW. In-depth analyses of electrical parameters of the systems conclude that the vertically oriented carport system is the most efficient solar rooftop system suitable for humid subtropical areas of Guwahati city.