In a solar rooftop system, the solar panels are installed in the roof of any residential, commercial, institutional and industrial buildings.
This can be of two types:
Such rooftop systems can be installed at the roofs of residential and commercial complex, housing societies, community centers, government organizations, private institutions etc. 1 kW rooftop system generally requires 12 sq. metres (130 square feet) of flat, shadow-free area (preferably south-facing). Actual sizing, however, depends also on local factors of solar radiation and weather conditions and shape of the roof.
Solar water heaters use the Sun’s energy to heat water during the day. This water is stored inside an insulated tank for use whenever required. The Sun rays have enough energy to heat water up to 55°C to 70°C which is more than sufficient for bathing, washing clothes, use in kitchen, etc. With negligible maintenance requirement, Solar water heaters provide a low cost long term solution to getting hot water. For cloudy days, Solar water heaters have a built-in backup electric heating element. Solar water heating (SWH) is the conversion of sunlight into renewable energy for water heating using a solar thermal collector. Solar water heating systems comprise various technologies including FPC and ETC.
Solar street lights are raised light sources which are powered by solar panels generally mounted on the lighting structure or integrated in the pole itself. The solar panels charge a rechargeable battery, which powers a fluorescent or LED lamp during the night.