A Solar Water Heater utilizes heat energy of Sun Rays (solar energy) to increase temperature of water and stores this heated water in an insulated tank, for use throughout the day. The capacity or rating of solar water heaters is defined by amount of water that it can warm – LPD – liters per day. Solar water heaters (SWHs) of 100-300 litres capacity are suited for domestic application i.e. a family of 4-10 members.
Counted among the most important innovations of the 20th century, SGT is used to prevent wastage, tampering and misuse of electricity. Here communication technology plays a vital role, computer, microprocessors, micro-controllers etc are used to control the supply and distribution of electricity.
The net metering based rooftop solar projects facilitates the self-consumption of electricity generating by the rooftop project and allows for feeding the surplus into the network of the distribution licensee. The electricity generated by the solar power system is first used to service consumer’s captive load within the rooftop owner’s premises. The solar power generated in excess of the owner’s electricity consumption is fed into the grid through a net-meter, which is a bi-directional energy meter capable of registering both import and export of electricity. This net generation is then credited to the owner’s account and adjusted subsequently against imports from the grid.