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Solar Water Heater – With the spiralling cost of electricity this healthy alternative to heating water not only saves money but also runs for a long, long time. Venus has introduced vacuum tube technology in Solar water heaters for the first time.

We at Venus believe in bringing the benefits of the latest technology to our consumers. Now, in Solar Water Heaters too Venus introduces “Vacuum tube collectors” for the first time in India. Internationally renowned & accepted, this technology is superior to other prevalent systems in performance, reliability & ease of installation. Breakthrough technology that taps the unlimited power of the sun to give you enormous energy savings year after year.
Working of Venus VTC Solar Water Heater

The Venus Vacuum Tube Collector solar water heater is made up of rows of parallel, transparent glass tubes. Each tube consists of a glass outer tube and an inner tube, or absorber, covered with a selective coating that absorbs solar energy well but inhibits radioactive heat loss. The air is withdrawn ("evacuated") from the space between the tubes to form a vacuum, which eliminates conductive and convective heat loss.

The Vacuum tube collector abosrobs the heat from the solar radiation & heats up the water stored in the system through the Thermosiphonic effect.
What is Thermosiphonic Effect
A thermosiphon system relies on warm water rising, a phenomenon known as natural convection, to circulate water through the collectors and to the tank. In this type of installation, the tank must be above the collector. As water in the collector heats, it becomes lighter and rises naturally into the tank above. Meanwhile, cooler water in the tank flows down pipes to the bottom of the collector, causing circulation throughout the system. This is called Thermosiphonic Effect. This process continues steadily for a numer of hours till the water stored in the tank is heated up. Very high Temperatures upto 80-85 deg C can be had from such a system.

The water heated in this manner is stored overnight in the insulated storage tank and is available for use the next day.

Heating from infrared rays of solar radiation
Greater absorption area per day
Minimum heat loss from the system due to the vacuum tubes & PUF insulated storage tank
Better performance in winter & on cloudy days. Up to 10ºC higher temperature
Maintance free, easy to clean
Inner tank and outer tank body are made from SS304 superior grade stainless steel to withstand corrosions and to last a life time
Compact size - low height & lesser space required for installation.
Installation Requirements
Unobstructed sunlight on a flat or slopping roof
Shadow-free area
Close to the bathrooms to avoid long piping & heat losses
A water tank at a minimum of 2.5m (7 ft) above roof level
The solar collector tubes facing south.
Besides individual houses, the VTC solar water heater is also ideal for schools, hostels, hotels, dairies, breweries, canteens and industries like automotive, fertilizer, chemical, textiles, pharmaceuticles, etc.
Superior corrosion resistant stainless steel inner tank.
SS 304L for water with TDS < 500 ppm.
SS 316 grade for hard water, saline water TDS < 1000 ppm.
Extra thick 5cm PUF insulation for minimum heat loss (upto 1000 LPD models).
Long Life corrosion proof MS precoated outer body
Vacuum tubes with superior coating to absorb maximum solar radiation and for maximum heat retention.
Backup electric heating element for cold rainy days (optional).
Power coated MS stand - study and rust resistant.
Energy Savings
Venus Solar Water Heaters are designed to offer substantial savings when compared to electric water heaters.

(Ltrs./ day)

Total cost of a solar water heater

Cost of Electric Water Heater *


Annual Saving **in Electricity

Pay back Period***

KWH (Rs.)
100SV – 316 Rs.23,500/- Rs.14,500/- Rs.9,000/- 900 units * Rs 5 Rs.4,500 24 Months
* One 100LPD Solar Water Heater replaces 2 Nos. 25 Ltrs. Electric Water Heater
** Calculated at tariff rate of Rs. 4.50 / KWH assuming usage of solar Water Heater for 300 Days / Year.
Energy consumed =3 units / day = 900 units / 300 days
*** Pay - back period = Rs.9,000 / Rs.4,500 = 2 years = 24 Months


100SV 316 /304 L

200SV 316 / 304 L

  100 litres per day
  200 litres per day
  No. of Vacuum Tubes
  15 Nos
  30 Nos
  Safety Devices (optional)
  Pipe Connection
  3 /4" SS Pipes
  3 /4" SS Pipes
  Backup Electric Heating (optional)
  2 kw heating element
  2 kw heating element
  Stand Angle
  35° - 38°
  35° - 38°
  Daily Usage
  upto 4 persons
  upto 8 persons
  Maximum No .of Outlets
  5 Year
  5 Year
Dimensions (In mm)




1500 420 1100 1250 1400
1500 420 2140 2300 2450
Higher Capacity models are also available (500 LPD, 1000 LPD etc.)
High Pressure Flat Plate models are also available.
*Refer "Terms & Conditions" in User Manual.
For 100SV 316 / 304 L grade - 5 Years
For 200SV 316 / 304 L grade - 5 Years
*Subject to terms and conditions mentioned in the user manual.
© 2012. All Rights Reserved. Venus Home Appliances (P) Ltd.