Solar Water Heater
 
 
 
FAQs > Solar Water Heater
 
 
 
 
 
 
Why should we opt for solar water heating?
  Solar water heating has the following advantages
  Solar water heaters save electricity and thus money; electricity is becoming more and more expensive and its availability is becoming     unrelaiable
  Solar water heaters are non-polluting
  Solar water heaters are safer than electric geysers as they are located on the roof
 
Is it being used in our country?
  Yes. More than 20,000 domestic systems are being installed every year all over the country
 
What happens during the monsoons or days with no sunlight?
ETC tubes absorb heat from the infra-red rays of solar radiation and not from the visible light rays. Consequently, the system performs well even during cloudy, foggy and rainy days. Moreover, to ensure that you never run out of hot water, all our solar water heaters have optional back –up electric boosters which are activated only if the hot water drops below your specified temperature. Our solar water heaters ensure you have hot water 24 hours a day, everyday.
 
Will I have hot water at 7 a.m. in the morning?
Due to high vacuum of our vacuum tubes and the thick PUF insulation of the water tank, the water stays hot through the night, ensuring that you have hot water the first thing when you wake up.
 
What if I have high pressure bath fittings such as rain showers, Jacuzzis or body jets?
We have a range of pressurised systems available to cater to high pressure bath fittings.
 
How do I integrate the heater with my current plumbing system without any breakage?
Our system is very easy to install and integrate with all kinds of existing plumbing systems without any breakage to existing plumbing. Our installation experts will visit your site and provide you with a detailed plan on how the system can meet your requirements.
 
How does use of solar water heater help the environment?
A 115 litre system, the average size of a household of 3 - 4 people, can prevent emissions of 0.4 to 1.0 tonnes of carbon dioxide per year. The reduction in emissions of carbon dioxide (one of the major green house gases) can positively help in slowing down the pace of global warming. Moreover, using a commercially and technically viable technology using sun to heat up water can help ease burden on our overloaded electricity supply system, and also free other limited energy sources like fossil fuels which can be used elsewhere.
 
What is the payback period?
A very sizable amount, which can be as high as 40% of an average household’s electricity bill goes towards heating water, depending upon your usage pattern, fuel replaced and electricity tariff in your area. So, payback will vary because of above factors. But on an average, the payback period:   About 3 years when electricity is replaced
  4 years when furnace oil is replaced
  6 years when coal is replaced
This calculation does not take into account rebates or subsidized loans. If you avail of an incentive, the payback period will be significantly reduced. After you recover your initial investment, the savings are yours to spend on yourself and your family, year after year.
 
What are the maintenance requirements?
ETC based solar water heaters do not need significant maintenance. The collector tubes may need annual cleaning to remove accumulated scale and sediment deposits at the bottom.
 
What is the expected life of a solar water heater?
ETC based solar water heaters can last for 20-25 years.
 
Can the glass tubes withstand hail stones?
The glass used to make these tubes is not ordinary glass but very strong boro-silicate glass, which enables the tubes to resist hail stones as big as 25 mm (1 inch) diameter size.
 
Can these systems be installed on sloping roofs?
Yes, the systems can be installed on sloping roofs as well as the flat roofs, subject to the direction of slope and un-obstructed sunshine.
 
What shall I do in case some tube breaks? Can I replace the broken tube myself?
The broken tube will have to be replaced by our team. In case of water leaking out of the system from broken tube, please shut the inlet and outlet valves and inform us at the earliest so that your system can be put in order without any delay.
 
Are additional geysers required after installation of Solar Water Heating System?
The Solar Water Heating System has inbuilt option of electrical back-up, and so no extra geysers are required in the bathrooms.
 
How much area is required for the installation of Solar Water Heating System?
The ETC based Solar Water Heating System requires very less area for installation. For example, for a 115 LPD system suitable for a small family of 2 to 3 persons, about 30 sp.ft area is required. And our 380 LPD system occupies 80sq.ft
 
If different use points are scattered and the capacity required is large how can I minimise the wastage of hot water in the pipelines?
In such a case, instead of a single large system, a number of smaller systems can be installed which have same total capacity as desired. These systems can be placed at locations closer to the use points, thus minimising the piping cost and the wastage of hot water too.
 
Why ‘new’ ETC (Evacuated Tube Collector) Technology is better than the ‘old’ FPC (Flat Plate Collector) Technology?
The ETC technology is almost a decade old and thus not so new! This technology, though much superior and suitable than FPC technology, could not take-off being more expensive than FPC technology. If you see the comparison chart below, it will be obvious that the only advantage FPC ever had over ETC was lesser price. But NOWADAYS, with recent worldwide advances in mass production techniques of evacuated tubes, ETC based systems are more cost effective than their FPC counterparts. In other words, FPC systems are as obsolete as typewriters in the computer age.