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subsidy area

Harayana

Maharastra

Telangana

Andhra Pradesh

Karnataka

Pre-approved subsidy ~30%

Available for solar systems to be installed on roofs of below categories of customers:

Residential

All types of buildings

Applicable states

Institutions
  • Educational Institutions
    • Schools
    • Universities
  • Health Institutions
    • Hospitals
    • Medical College
Type of System :

Grid-connected solar systems (without batteries)

System Sizes :

5kW, 10kW, 15kW, 20kW, 25kW

Features :

Included (remote Monitoring System + O & M for 5years)

Payback

31/2 Years to 41/2 Years

Return on Investment

20% to 25%
Contact us

+91 99013 30955

leave details below

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Solar Water Heaters

Shop by Type

Evacuated Tube Collector (ETC)
Solar Water Heaters

Starting from

₹ 12,000

Flat Plate Collector (FPC)
Solar Water Heaters

Starting from

₹ 22,000

Shop by Capacity

ETC Solar Water Heater Models

FPC Solar Water Heater Models

Shop by Home/Family Size

1/2 BHK

Single/Couples

100 LPD
1/2 BHK

Family of Three

150 LPD
2/3 BHK

Family of Four

200 LPD
3/4 BHK

Large Families

250 LPD
3/4 BHK

Large Families

300 LPD
Villas/
Bungalows

Large Families

500 LPD

Shop by Brands

Shop by Application

Solar Water Heaters for Normal Applications

  • Normal Showers/Taps
  • Over Head Tank Height: 6 ft. -10 ft.
  • Water Pressure < 1 bar
  • No Booster Pump installed

Solar Water Heaters for Pressurized Applications

  • Rain /Jet Showers, Jacuzzi, Tubs
  • No Over Head Tank / Tank Height
    <5 ft. > 12 ft.
  • Water Pressure above 1 bar
  • Booster Pump installed

Shop by Inner Tank Material

Tanks with Anti-corrosive coating

  • Anti-corrosive coating provides protection against corrosion
  • Water hardness: Upto 600ppm

Copper Tank Models

  • Best Hygienic Water, resistant against water corrosion
  • Water hardness: Upto 800 ppm

Stainless Steel (SS) Tank Models

  • Light weight & cost effective
  • Water hardness: Upto 300 ppm

Galvanized Iron (GI) Tank Models

  • Not suitable for soft water
  • Water hardness: 300 ppm – 600ppm

Heat Exchanger Type Tank Models

  • Double tank with anti-corrosive coating
  • Water hardness: Any type of water & hardness level (Upto 2000ppm)

Best Deals on Solar Water Heaters

Best Combo Deals on Solar Water Heaters & Pumps

Frequently Bought Together with Solar Water Heaters

Heat Pumps

Submersible Pumps

Booster Pumps

Water Softeners

Need Help?

Frequently Asked Questions

What are the benefits of using a solar water heater?

A solar water heater is a technically proven and commercially viable solution to meeting the daily hot water needs of a residential household. It offers the following benefits:

  • Availability of hot water throughout the year

With a solar water heater you are assured of reliable hot water supply throughout the year and these systems if properly installed & maintained have a lifespan of 15 years and more. With the abundant supply of sunshine throughout India (most parts of India have on an average 300 sunny days per year), these systems can meet your daily hot water needs on most days and even on cloudy days there is usually enough radiant heat available to provide you warm water.

  • Significant savings on water heating costs

An average household with an electric water heater spends about 25% of energy costs on heating water and the use of a solar water heater has the potential to reduce this cost annually by about 50% to 85%. The smallest solar water heating system with a capacity of 100 lpd (litres per day) can replace a 2 kW electric geyzer and save upto 1500 units of electricity per year

  • It’s an environmentally friendly option

Reduce your hot water carbon footprint:Each unit of electricity consumed by an electric water geyzer leads to an effective coal consumption of 1.5Kg at the power plant used to produce this electricity. A 100lpd solar water heater thus offsets an equivalent coal burning of about 1500 Kgs per year.

Saves water:Each unit of electricity produced at a power plant consumes on an average 3 litres of water for cooling purposes. Thus a 100 lpd solar water heater can also save around 4500 litres of water every year.

  • They are reliable

As long as the sun is shining, hot water will continue to flow through your pipe & plumbing fixtures. The reliability of solar water heaters is further enhanced by the fact that there are no moving parts and the system is very easy to maintain, requiring no more care than a standard water heating system. Most of the solar systems available today simply require an annual checkup and a system flush to ensure that the system stays operational. Further, warranties are available from manufacturers for the entire system and for the individual parts (tank and the collector).

How does a solar water heater work?

A solar water heater uses heat energy available from the sun to heat water. The basic configuration of solar water heaters used in residential applications consists of:

  • A solar collector that absorbs the sun’s heat energy and transfers the heat absorbed to a working fluid. Collector technologies are of two types: Flat Plate Collectors (FPC) and Evacuated Tube Collectors (ETC)
  • A means of transferring the heat energy absorbed by the working fluid to the water that needs to be heated.
  • An insulated water tank that stores the water heated for future use

What are the different type of solar water heater technologies available?

Solar water heaters differ in terms of the collector technologies used and the design & construction of the system to suit specific applications.

Solar Water Heaters –Classified Based on Type of Collectors:

Basic solar water heaters are of two types depending upon the collector technology used: Flat Plate Collector (FPC) type and Evacuated Tube Collector (ETC) type.

                             

The Flat Plate Collector consists of an insulated metallic box covered on the top with toughened glass. The metallic box contains an absorber sheet (normally made of copper) that is coated with a selective coating toincrease the absorption of solar energy. Vertical tubes made of copper, known as riser tubes are attached to the absorber and carry the water to be heated. The riser tubes are connected to two horizontal tubes called headers, one placed at the bottom and the other at the top. The bottom header is used for flow of water into the collector whereas the top header is used to take out the heated water.

Cold water enters the storage tank, fills it up and then flows to the collector through the bottom header and into the riser tubes, until all the absorber tubes and the header at the top are full. When the sun shines, the heat energy is absorbed by the absorber and transferred to the water in the riser tubes. The heated water being lighter than the cold water rises and via the top header pipe flows into the storage tank. More cold water flows into the collector, gets heated and rises to the top, and so on. This process known as the “Thermosyphon process” continues until the temperature of the water in the storage tank and the collector equalizes. Hot water is stored in the insulated storage tank and is available for use as and when required.

To view the FPC solar water heater models selling on Glowship, click here

 

                  

The Evacuated Tube Collector consists of two co-axial glass tubes fused at both ends with air between the tubes evacuated to create vacuum that works as insulation. The outer surface of the inner tube forms the collector area and it is selectively coated to increase the absorption of solar energy.

Cold water enters the storage tank, fills it up and then flows into the individual tubes until all the tubes are full. When the sun shines, the heat energy is absorbed and transferred to the water in the inner tube. The heated water being lighter than the cold water rises and flows into the storage tank. More cold water flows into the collector, gets heated and rises to the top, and so on. This process known as the “Thermosyphon process” continues until the temperature of the water in the storage tank and the tube equalizes. Hot water is stored in the insulated storage tank and is available for use as and when required.

To view the ETC solar water heater models selling on Glowship, click here

In addition, in both these types of technologies variantsare available tosuit specific applications:

Solar Water Heaters –Classified Based on Type of Application:

  • Normal Applications: These systems are the basic models (available in both ETC & FPC type systems) and are used when the system is operating under atmospheric pressure (i.e. there are no pressure pumps being used to pump water out of the storage water tank).

Click here to view solar water heaters suitable for soft water (water hardness < 300ppm) and normal applications.

Click here to view solar water heaters suitable for hard water (water hardness 300ppm – 600ppm) and normal applications.

Click here to view solar water heaters suitable for extreme hard water (water hardness > 600ppm) and normal applications.

  • Pressurized Applications: These systems can withstand the higher operating pressure that exists due to the use of a pressure pump in the water circulation system. Pressurized systems are suitable when:
    • The height of the overhead tank carrying cold water is less than 7 ft above the terrace
    • High pressure hot water flow is required for various uses like jet showers, shower panels etc
    • The number of hot water points are more than normal 

The pressure rating of these types of systems varies from 3 bar upto 8 bar.

Click here to view solar water heaters suitable for soft water (water hardness < 300ppm) and normal applications.

Click here to view solar water heaters suitable for hard water (water hardness 300ppm – 600ppm) and normal applications.

Click here to view solar water heaters suitable for extreme hard water (water hardness > 600ppm) and normal applications.

  • Hard watersuitable systems:This type of system is used in cases where there is hard water or where the ambient temperatures are low enough to cause water freezing. In such cases, distilled water is used as the heat transfer medium and is circulated in a closed loop system through the solar fins or tubes and goes back into the top of the outer tank where it transfers its heat to the cold water in the inner tank. 

The water hardness tolerance level for the different type of systems varies from 600ppm to 1200ppm.

Click here to view solar water heaters with heat exchanger type tanks

Optional features:

The following optional features are available with all kinds of water heaters:

  • Electrical back-up heater: Most solar water heaters come with the provision of an electrical back-up heater that can be used to heat water on cloudy days when enough sunshine is not available to heat the water to the desired temperature.
  • Sacrificial anode:The sacrificial anode rod made of Aluminium/Magnesium is screwed to the storage tank and protects the tank against galvanic corrosion. For long life of the storage water tank it is advisable to replace the anode rod from time to time. Magnesium anodes in general protect the tank for a longer duration compared to Aluminium anodes.

Click here to choose from different brands of solar water heaters based on the type of collector / application / water hardness & other useful parameters:

What is the maximum temperature the water will be heated to?

Solar water heaters depending upon the technology and efficiency heat the water up to 60 to 80 degrees.

Which type of solar water heater is better, FPC or ETC?

The choice of an FPC or ETC type of solar water heater depends upon the location, seasons and other external factors.

In general, FPC type solar water heaters have better performance in hot climatic conditions whereas ETC type solar water heaters perform better in cold climatic conditions. A detailed comparison between the two technologies in the context of providing domestic water heating is as below:

 

Criteria Comparison between FPC & ETC type Solar Water Heaters
Heat generation ETC has better heat generation in colder climates and under cloudy/low sunlight conditions
Heat insulation ETC has lower heat loss at night as the vacuum inside the tubes offers better insulation
Pressure endurance In case of non-pressurized systems, FPC can withstand higher pressure compared to ETC
Water hardness In case of non-heat exchanger type systems, scaling due to hard water leads to a higher loss in efficiency in case of FPC compared to ETC
Durability FPC systems can last for 15 years or more without major maintenance whereas ETC systems can last for 5 years or more without major maintenance.
Operations & Maintenance ·         The tubes in case of ETC are prone to breakage and in case of breakage of one of the tubes the entire system gets drained and hence is not usable. However, the cost of replacement in case of ETC is lower as the broken tube can be replaced whereas in case of FPC the entire glass needs to be replaced

·         Corrosion is not an issue in case of ETC as it is made of glass

·         ETC systems cannot be exposed to solar radiation when there is no water inside the tubes as thermal shock could lead to cracking of the tubes

 

Does the solar water heating system work on cloudy days?

Yes, a solar water heater works on cloudy days as even under cloudy conditions there is usually some radiant heat available to heat water though this to a lesser extent compared to a sunny day. An optional, electrical back-up heater can also be provided in most solar water heaters so that it can be used to further heat this water to the required temperature.

What is the life of a solar water heater?

Good quality solar water heaters are generally expected to last around 15 years or more and FPC type solar water heaters are in general more durable than ETC type solar water heaters. If the solar water heater is maintained properly and water quality is not a problem the systems can actually last for upto 30 years and there are already a few installations in India that have been operating for so long.

What are the regular maintenance requirements of a solar water heater?

A solar water heater in general requires minimal maintenance. The surface of the collector must be periodically cleaned to remove dust from the top surface to ensure maximum amount of heat is captured by the Collector. Occasional observation of the solar water heating system to eliminate any plumbing leakages may help. The exposed metal surfaces may be examined for any damage to paint etc after monsoon period to avoid corrosion related issues. Some rubber or plastic components may not last beyond 10 years and may require replacement. The back-up water heatermight not last through the life of the solar water heater and will require replacement.

In order for you to be able to maintain the performance of the solar water heater, or, maximize your return on investment, Glowship offers India’s first preventive maintenance contract that can be bought along with the purchase of a solar water heater. The regular checks performed as part of the contract ensures performance of your solar water heater is maintained at the optimum level. The contracts are available for 1yr/3yr duration and are offered for all brands/models of solar water heaters. The scope of services covered under the contract is mentioned on the website for each & every model of solar water heater.

In addition, if you’re already the owner of a solar water heater and are facing issues with its performance then you can opt for solar water heater services packages from Glowship. The service packages are available for both FPC & ETC solar water heaters.

What are the warranties &guarantees offered on solar water heaters?

All solar water heaterscome with a minimum warranty of 1 yr. provided by manufacturers and in some cases the warranty on the full system / tank specifically extends to 5yrs. The exact details can be found on Glowship mentioned separately for each model. In addition to the warranty, it is advisable to purchase a preventive maintenance contract so that the solar water heater continues to deliver optimum performance.

What are the certifications available for solar water heaters sold in India?

The Bureau of Indian Standards (BIS) specifies the standards for solar collectors for certified products in India. All solar water heaters sold on Glowship confirm to BIS standards.

Is it necessary to have a south facing shadow free area for installation of a solar water heater?

In India, solar water heaters perform best in winter when installed facing south with the angle of inclination equal to the latitude of the location.However, deviations of 30 degrees on either side of solar south and plus or minus 15 degrees in angle from the latitude will only cause a small loss in performance. A 100lpd solar water heater requires around 2sqm. shadow-free area. The floor area required by each solar water heater is mentioned under Product Specifications for each model.

What kind of solar water heater should I install and what capacity is the right capacity?

The type of solar water heater you should install and the capacity required depends upon a number of factors. To make a reliable purchase, you can use our Product Selector tool as it will recommend to you the exact capacity and model of solar water heater best suited to your requirements. Learn more about how the product selector works here.

Broad guidelines to help you select the best-fit solar water heater are outlined below:

Solar Water Heater Capacity based on Family Size and Size of Home

 

Family Size Size of Home Recommended Capacity
Single/Couples 1 or 2 BHK 100 litres/day
Family of 3 1 or 2 BHK 150 litres/day
Family of 4 2 or 3 BHK 200 litres/day
More than 4 people 3 or 4 BHK 250 or 300 litres/day
More than 4 people Villa or Bungalow 500 litres/day

 

Solar Water Heater Type based on Type of Application & Water Quality

  • Normal or Non-pressurized Applications
    • Soft water models (water hardness < 300ppm) – typically when you have municipal water supply
    • Hard water models (water hardness 300ppm – 600ppm) – typically when you have mixed water supply, that is, both municipal water &borewell water supply.
    • Extreme water hardness modelstypically when you use water from a borewell
  • Pressurized Applications
    • Soft water models (water hardness < 300ppm) – typically when you have municipal water supply
    • Hard water models (water hardness 300ppm – 600ppm) – typically when you have mixed water supply, that is, both municipal water &borewell water supply.
    • Extreme water hardness modelstypically when you use water from a borewell

Learn more about pressurized and non-pressurized models of solar waters here

Solar Water Heater Type based on type of Inner Tank

  • Tanks with anti-corrosive coating: These models of solar water heaters can typically withstand water hardness upto 600ppm.
  • Copper tank models:These models of solar water heaters can typically withstand water hardness upto 800ppm. Copper tanks provide the additional benefit of providing clean, hygienic water.
  • Stainless Steel tank models: These models of solar water heaters are light weight and cost effective and can withstand water hardness upto 300ppm.
  • Galvanized Iron (GI) tank models: These models of solar water heaters can withstand moderate hard water, that is water hardness between 300ppm and 600ppm and are not suitable for use with treated or soft water.
  • Tanks with heat exchangers: These models of solar water heaters are designed to withstand extreme hardness in water. You can learn more about heat exchanger type solar water heaters here

How does the Glowship product selector determine the right product for me?

Glowship’ssolar water heater product selector tool is one of the most sophisticated tools in the solar industry that enables you to choose the best-fit solar water model based on your requirements. The product selector tool recommends the suitable solar water heater capacity, type of solar water heater and filters the exact models of solar water heaters you can buy from different leading brands in India. A brief description of how the tool works is provided below:

Recommendation of solar water heater capacity

The product selector tool calculates the solar water heater capacity appropriate for your usage taking into account

  • the type of residential unit you live in
  • the number of people using hot water
  • the number of bathrooms to which hot water will be supplied to
  • the solar insolation available atyour location – The hot water output for the same system capacity varies from place to place depending upon environmental conditions. The Ministry of New and Renewable Energy in India (MNRE) has compiled exact data for the hot water output for specific locations in India. The hot water output of the solar collector for your location is extrapolated from the same and is expected to within 10% of the above exact data. We take into account the hot water output for an average clear day in December (for plane areas) and in April (for hilly areas) so that the required capacity is calculated for the period when you need hot water the most.
  • your hot water usage (based on consumption data published by United Nations Development Program, UNDP and Ministry of New and Renewable Energy, India, MNRE)
  • expected heat losses

Recommendation of type of solar water heater

 The product selector tool recommends the appropriate model/technology of solar water heater taking into account:

  • the water quality
  • the type of water supply you have (whether it is pressurized or gravity fed through an overhead tank)
  • climatic conditions
  • the type of gadgets in your bathroom (whether you are using pressurized gadgets such as shower jets etc.)
  • and other site specific conditions such as height of your overhead tank etc.

Recommendationof pressure booster pump 

Based on your inputs the solar water heater product selector tool also determines if you would require a pressure booster pump and provides you a recommendation of a suitable booster pump you can purchase along with the solar water heater.

Recommendationof heat pump  

The tool also suggests a cost-effective water heating solution by pairing the solar water heater with a suitable heat pump, wherein, hot water provided by the solar water heater is used to cater to your regular demand and hot water from the heat pump is used to supply the additional hot water required enabling round-the-clock supply of hot water.

To make a reliable purchase of the best-fit solar water heater, start your journey here

What are the benefits of buying solar water heaters on Glowship?

Glowship is India’s largest marketplace for solar water heaters. We help you make an assured, reliable purchase in the following ways:

  • Make a Trusted purchase from Verified Sellers:Glowship carries listings from only verified Sellers or Manufacturers. We providecomprehensive ratings on service & delivery for each seller offering you the flexibility to make a purchase of your choice.
  • We are a One-stop Solution:All our Sellers offer you free installation & hot water plumbing service at a nominal cost thus offering you the convenience of a high quality, one-stop solution, so, you don’t need to look anywhere else. Add-on spares such as a stand for your overhead tank, electrical thermostats, Pressure Reducing Valves etc. are also available for purchase along with the solar water heater.