Buy Solar Water Heater in India. Buy Solar Water Heater online of top companies like V-Guard, Deshmukh etc.
What is solar water heater?
Solar water heater is a system that utilizes solar energy (or the energy from sunlight) to heat water. It has a system that is installed on a terrace or open space where it can get sunlight and the energy from the sun is then used to heat water and store it in an insulated tank. The system is not connected to electricity supply and thus does not have an on-off switch, but it uses the sunlight throughout the day to heat the water and store it in the storage tank. Water from the storage tank can then be used for any application as desired.
Different types of solar water heaters available in market.
There are 2 types of solar water heaters that are available in Indian market:
1) FPC (Flat Plate Collectors) system: These are metallic type systems and have a longer life.
2) ETC (Evacuated Tube Collectors) system: These systems are made up of glass and are fragile.
Both these type of water heaters come with or without pump. Pump is used to move water from collectors to the storage tank. Those without pump use thermosyphon principle to move water from collectors to storage tank automatically.
How to decide on which type to buy?
ETC systems are fragile but are cheaper. They are also very good for colder regions where the temperature is sub zero. In place where the water is salty, these systems require regular cleaning due to deposition of salt on the inner surface of glass tubes.
FPC systems are long lasting, as they are metallic. But they are expensive than ETC systems. They can work in colder regions with sub zero temperature but will need an anti freeze solution making the system expensive. In places with salty water a heat exchanger is required with FPC system to avoid scale deposition that can impact the heating capability of the system.
They are enough efficient to work nicely in cloudy weather also when their is little sunlight available.
System without pump (thermosyphon) is ideal for domestic and small application users (as it is cheaper) provided water does not have high chlorine content. Those with pumps are good for industries.