Explain the functioning of solar water heater. what are it's disadvantages?
Solar Water Heaters are also commonly known as domestic solar hot water systems and have gained a lot of popularity recently. They are not just a cost effective but also an environmental friendly way to heat water for your domestic needs. As they use sun’s heat to work so if you stay at a place which has good exposure to sunlight then a solar water heater will surely help in decreasing the electricity bill expenses Disadvantages:
Additional roof top space is required to install the solar heater.
Working of solar heaters depends up on abundance and availability of direct sun light.
It heats only in day time, however if the storage tank is well insulated, heated water can be stored and used even at night.
It will not be very helpful in rainy season or foggy days.