Solar Water Heater

Solar Domestic Hot Water System is a cost-effective way to generate hot water for your home for bathing, washing, cleaning, etc. using solar energy. This gadget can be used in any climate and the fuel it uses – Sunshine which is free. It is generally installed at the terrace or where sunlight is available and heats water during day time which is stored in an insulated storage tank for use when required including mornings.

It comprises of an array of solar collectors to collect solar energy and an Solar Water Heater – ETC Type insulated tank to store hot water. Both are connected to each other. During the day time, water in solar collectors gets heated which is either pumped or flown automatically on thermosyphon principle to the storage tank. Hot water then stored in the tank can be used for various applications. Two types of Solar Water Heaters are available; one based on flat plate collectors and the other based on evacuated tube collectors. Flat Plate Collector (FPC) based systems are of metallic type and Evacuated Tube Collector (ETC) based system.

•  Around 60 deg. – 80 deg. C temperature can be attained depending on solar radiation, weather conditions and solar collector system efficiency.
•  Hot water for homes, hostels, hotels, hospitals, restaurants, dairies, industries etc.
•  Can be installed on roof-tops, building terrace and open ground where there is no shading, south orientation of collectors and over-head tank above SWH system.
•  SWH system generates hot water on clear sunny days (maximum), partially clouded (moderate) but not in rainy or heavy overcast day.
•  Majorly soft and potable water can be used.
•  Solar water heaters (SWHs) of 100-300 liters capacity are suited for domestic application.
•  Larger systems can be used in restaurants, guest houses, hotels, hospitals, industries etc.

•  The system works all year round, though you'll need to heat the water further with a boiler or immersion heater during the rainy season.
•  Sunlight is free, so once you've paid for the initial installation, your hot water costs will be drastically reduced.
•  A 100 liters capacity SWH can replace an electric geyser for residential use and averagely save upto 1395 units of electricity annually.
•  Solar hot water is a green, renewable heating system and can reduce your carbon dioxide emissions. A SWH of 100 liters capacity can prevent emission of 1.5 tons of carbon dioxide per year.