With abundance of solar power available in a tropical country like ours, using electricity to heat water is a waste of money. Solar water heating systems has many advantages. A house spends most of its power bills on water heaters & Air conditioners. One half of it could be reduced with Solar water heaters.
Hot Water without electricity
Hot water availability even in night with water stored in insulated tanks
Optional electric backup is provided in case of no sunlight
Storage tanks are designed to handle hard water
Possible to produce hot water even in remote areas where power is not available
The long term benefits of solar water heaters are huge and the maintenance is very less.