You should not consider investing in green energies unless you are ready to spend at least fifteen years in your home. Paying off your solar energy system will take you years and the return on your investment will depend on how long you stay in the same home and keep using the solar energy system.
SOLAR WATER HEATER IN HINDI.
The best time to incorporate solar power into the design of a home or building is in the initial construction. Windows are best facing south to let maximum sunlight (hence greenhouse heat) in during the winter. Likewise, avoid windows facing directly into the summertime sun to keep things cooler, so less power is needed for fans or air conditioning. The maximum roof space, however, should always get sunlight exposure.