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Solar Water Heaters Hot water at 60-80 C  for hotels, hospitals, restaurants, dairies, homes, industry etc. Solar water heaters (SWHs) of 100-300 litres capacity are suited for domestic application. Larger systems can be used  in restaurants, canteens, guest houses, hotels, hospitals etc.  

Fuel Savings: A 100 litres capacity SWH can replace an electric geyser for residential use and saves 1500 units of electricity annually.  

Avoided utility cost on generation The use of 1000  SWHs of 100 litres capacity each can contribute to a peak load shaving of 1 MW.  

Environmental benefits A SWH of 100 litres capacity can prevent emission of 1.5 tonnes of carbon-dioxide per year.

Life                            15-20 years
Approximate cost     Around Rs.22000 for a 100 litres capacity SWH
                                  Rs.110-150 per installed litre for higher capacity systems
Payback period      3-4 years when electricity is replaced                              
                                4-5 years when furnace oil is replaced
                                6-7 years when coal is replaced

Solar water heaters based on Flat plate Collectors (FPC based SWH) Here the solar radiation is absorbed by  flat plate collectors which consist of an insulated outer metallic box covered on the top with glass sheet. Inside there are blackened metallic absorber (selectively coated) sheets with built in channels or riser tubes to carry water. The absorber absorbs the solar radiation and transfers the heat to the flowing water  

Solar water heaters based on Evacuated Tube Collectors (ETC based SWH)

Here the collector is made of double layer borosilicate glass tubes evacuated for providing insulation. The outer wall of the inner tube is coated with selective absorbing material. This helps absorption of solar radiation and transfers the heat to the water  which flows through the inner tube.


Subsidy and Incentives  Though the initial investment for a solar water heater is high compared to available conventional alternatives, the return on investment has become  increasingly attractive with the increase in prices of conventional energy.   The pay back period depends on the site of installation, utilization pattern and fuel replaced. To offset the high initial investment for solar water heaters, the Ministry is currently  implementing a soft loan  scheme through  seven  designated banks and Indian Renewable Energy Development Agency (IREDA), which has now been extended to all kind of Financial Institutions

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SOLAR WATER HEATERS

 :There are various Solar Water heaters and from capacities of 50L to 20,000 L . The Pressurized and non pressurized. The integrated, and the separated. . With tanks made from food grade steel.

With the Heat pump being a new entrant using the heat   from the air-conditioner to provide for hot water. To know what and where and install the same are left to the expertise of our engineers for a beneficial installation in terms of economics and environmental safety

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SOLAR WATER HEATERS:

 Passive heating with the available solar energy through a system that stores and maintains the temperature of water for bathing. We have to realise that Heating consumes the most amount of electricity nearly 3KWh so on an average of an hours heating per day a household would consume about 1000KWh or 1 MWh per annum. The bill from heating would be about equal the amount paid for usage of other appliances and lightings. With CFA and subsidy you could installation of a system the Interest is 2% to 5% per annum with the added advantage of a rebate in your electricity bill