This solar water heating systems basically works by Thermosyphn method, i.e, without pump, power and battery. It works in sunlight energy to convert heat energy. Solar water heater storage tank consists of S.S sheet insulated tank. It installed at Domestic/ Commercial buildings and factory area on a sun exposed flat roof or sloping roof preferably facing south and at a place where the shadow free for a minimum of 3-5hours and It will generate heat up to that capacity. It has two types of collectors.