Energy Efficiency & Renewable Energy Management Centre 
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No. The Centre is promoting the use of Solar Water Heaters in Delhi as an Energy Conservation measure.
In the case of purchases made between 22-12-2006 to 30-04-2007, the consumer is required to submit a claim directly to the EE & REM Centre. After necessary verification, the rebate / incentive will be released to the Consumer through ECS (Electronic Clearing System). For purchases made on or after 01-05-2007, the equipment is to be sold by the Manufacturer / Supplier / Dealer after reducing the amount of rebate / incentive from the Bill of the Consumer. The vendor shall submit a claim to EE & REM Centre for getting the rebate passed on by it to the Consumer. The EE & REM Centre, after necessary verification, shall release the amount to the vendor through ECS.
It refers to the electricity consumers whose supply type or tariff category is mentioned as Domestic in the electricity bill.
The cost details for the purpose of loan are available at MNRE website at http://mnre.gov.in/ui&cgr/advertisement.htm. The market price may be higher and may vary from vendor to vendor. The cost of a 100LPD system varies from Rs.18000/- to Rs.25000/- depending upon type and location of the system. The cost of piping (Plumbing), heat exchanger, controller, cold water tank, transportation etc. may be extra.
The system cost mentioned in the MNRE website includes Five Year warranty. However, the consumer is required to obtain details of guarantee / warranty available on the particular product sold by a vendor.
For availing Delhi Government rebate/incentive, the consumer is required to purchase the system / equipment from BIS approved manufacturers of FPC based system or MNRE approved suppliers of ETC based systems or their authorized dealers. List of vendors having office in and around Delhi is available at DTL website at http://www.delhitransco.gov.in/EnergyEfficiency/Public_notices.htm. The detailed list is available at MNRE website at http://mnre.gov.in/ui&cgr/advertisement.htm
Yes. This is absolutely necessary as per the Rebate / Incentive Scheme of Delhi Government. Bureau of Indian Standards (BIS) grants license to Manufacturers of Flat Plate Collector based Solar Water Heaters. The Suppliers of Evacuated Tube Collector based Solar Water Heaters are approved by Ministry of New and Renewable Energy (MNRE), Government of India.
The Flat Plate Collector based equipment is available at the lowest capacity of 100 Litres per day (LPD) and the available minimum capacity of Evacuated Tube Collector based equipment is 50 LPD
The capacity of SWH can be worked out on the basis of daily requirement of hot water in the household. It is sum total of hot water required by a household in a day. It is observed that one person requires approx. 25 Litres of hot water for bath. So a 100 LPD system may be sufficient for a family of four persons. In case of larger requirement, a bigger capacity may be chosen.
In this type of SWH, 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. The flowing hot water is then collected in the storage tank.
Evacuated Tube 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. The flowing hot water is then collected in the storage tank.
15-20 Years.
Preferably DJB / Public Supply water should be used. If water quality is not good then heat exchanger is additionally required in FPC based system.
At present no such scheme is available.
There is no need to discard your Geyser. It can be used in combination with your new SWH. The only thing that you need to do is to connect the out let of your SWH to the inlet of your existing geyser. The temperature of the water coming out of SWH can also be elevated through the electric geyser, if needed.
The SWH heats water only when sun is there. In case of foggy / rainy day, the hot water already available in the system may be utilized. Further, the systems sold now a days have built in electrical back up, which can be used for heating water on such occasions.
A 100 LPD system requires open surface of 2M X 2M.