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

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 models

typically 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 models

typically 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

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