Lower power bills
An electric geyser is one of the biggest power users in a home. Let the sun do that job instead.
Solar water heaters
Hot water, heated by the sun
Solar water heaters for homes, hostels, hotels and businesses. They heat water with sunlight alone, need no electricity to run, and cut one of the biggest items on your power bill.
- No electricity needed
- Hot water overnight
- Free site survey
0Electricity to runnatural circulation, no pump
25–30LHot water per persona day, as a rough guide
15+yrsTypical system lifewith basic care
FreeSite surveywith no obligation
Why solar hot water
Free heat, every sunny day
Heating water takes a lot of energy. A solar water heater gets it from the sun instead of your electricity meter.
No electricity to run
Natural circulation means no pump and no power needed, even during power cuts.
Warm water after dark
An insulated tank keeps water hot overnight and through short cloudy spells.
Long life, low upkeep
A simple system with few moving parts that lasts for many years with basic care.
No pump, no powerWater circulates on its own
How it works
Simple physics, no pump
Our systems use the thermosiphon principle: hot water rises and cool water sinks, so water circulates on its own.
- 1The sun heats the collectorPanels or tubes on the roof absorb sunlight and warm the water inside them.
- 2Hot water rises into the tankWarm water is lighter, so it flows up into the insulated tank above the collector.
- 3Cool water sinks back to be heatedCooler water from the bottom of the tank returns to the collector, with no pump needed.
- 4Hot water on tapYour bathrooms and kitchen draw hot water straight from the tank.
Size guide
What capacity do you need?
Capacity is measured in litres per day (LPD). Move the slider to the number of people using hot water.
Capacity finder
For homes. For hostels, hotels and businesses we size the system to your actual use.
Suggested capacity150 LPD
Hot water a day100–120 L
Bathrooms served2–3
Rough guide only, based on about 25–30 litres of hot water per person per day, rounded up to a standard size. Bathroom count is indicative. We confirm the size at the site survey.
Common sizes
100 LPD2–3 peopleSmall family
150–200 LPD4–6 peopleMost families
250–300 LPD7–10 peopleLarge homes
500 LPD and upHostels, hotels, hospitalsCustom
Heavy use, such as long showers or a bathtub, needs a larger size. Tell us how your household uses hot water and we will size it right.
Collector types
Evacuated tube or flat plate?
The two main kinds of collector. Your water quality and budget decide which suits you, and we advise after the survey.
Evacuated tube collector
Rows of glass vacuum tubes that trap the sun's heat.
- Lower cost for the same capacity
- Performs well in cooler or cloudy weather
- Individual tubes can be replaced
Best for soft water and budget-conscious homes.
Flat plate collector
A sturdy metal absorber plate under toughened glass.
- Robust, with no glass tubes to break
- Handles hard water better
- A long-lasting choice for heavy daily use
Best for hard water areas and commercial use.
Installed by our own teamSurvey, fitting and plumbing
Who it suits
Anywhere that uses hot water every day
From a family bathroom to a hotel laundry, solar hot water pays off wherever hot water is used daily.
Homes and villas
Apartments and societies
Hostels and PGs
Hotels and resorts
Hospitals and clinics
Dairy and food processing
Swimming pools
Community centres
Care tips
A little care, many years of hot water
Solar water heaters need very little attention. These simple habits keep yours working at its best.
Keep it clean
Wipe dust off the collector every few weeks so it absorbs the most sunlight.
Descale if water is hard
Hard water leaves scale in the system. Periodic descaling keeps it efficient.
Check pipes and insulation
Look for leaks and damaged insulation on outdoor pipes once in a while.
Book a yearly service
A quick annual check keeps the system running well for years.
Prefer us to look after it? Ask about periodic servicing with your quote.
FAQs
Questions about solar water heaters
Does a solar water heater need electricity?
No. In a thermosiphon system, water moves between the collector and the tank on its own, because hot water rises and cool water sinks. There is no pump, so it keeps heating water during power cuts, as long as water is reaching the tank.
Will I get hot water on cloudy days and in the monsoon?
The insulated tank keeps water hot overnight, so you usually still have warm water after a cloudy spell. During long stretches without sun, an electric backup heater in the tank can top up the temperature. Ask us about adding one.
What size do I need?
Size depends on how many people use hot water and how. As a rough guide, allow about 25 to 30 litres of hot water per person per day. A family of four is usually well served by a 100 to 150 litre system. Try the size guide above, and we will confirm it at the site survey.
Evacuated tube or flat plate: which is better?
Evacuated tube collectors cost less and perform well in cooler or cloudy weather, but they suit soft water best. Flat plate collectors are sturdier and handle hard water better. We look at your water quality and budget before recommending one.
What does my roof need?
A shade-free spot facing the sun for the collector, with the tank mounted above it, and a roof strong enough to carry a full tank. We check the space, the water supply and the plumbing route during the free site survey.
How much maintenance does it need?
Very little. Keep the collector clean of dust, check the pipes and insulation now and then, and descale the system if your water is hard. We can do periodic servicing for you.
Is there a subsidy for solar water heaters?
Some state governments and electricity companies have offered rebates or incentives for solar water heaters from time to time. These vary by area and change often, so we tell you what applies to you when we quote.
Where do you install?
We work from our offices in Hyderabad and New Delhi. For other locations, call us on 9705 9705 45 and we will let you know whether we can help.
