Solar Water Heater

  • Date Added: Wednesday, 11 July 2012

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S R S Water Heaters are assembled from the best imported components. Thanks to high tech vacuum tube technology which converts 98% of infra red rays of solar spectrum into heat energy, due to which we get hot water.

Capacity: The actual capacity of solar water heater depends on number of persons living in a home & utilization of hot water. In Pakistan an average adult uses about 35Lt of warm water.




1)      INNER TANK: 0.4~0.5mm SUS 2B stainless steel

2)      OUTER WATER TANK: Rust Free Color steel (PVDF)

3)      INSULATION: Polyurethane foam (thinkess:50~55mm)

4)      EVACUATED TUBE: High-quality borosilicate glass

5)      BRACKETS: Imported zinc-coated steel with spraying (thickness:1.2mm)

6)      REFLECTING ANGLE: 38 – 45 degrees

7)      TEMPERATURE (SUNNY DAY): 40-96 °C/day


Life of System: 15 years plus

Pay Back Period:

With today’s tariff the pay back period of SRS Solar Water Heater is within 18 months. After which one can enjoy free hot water for rest of product’s life.


Types of Solar Water Heater:


1) Non Pressurized System:

If the flow in house is gravity based then non pressure solar water heating system is installed. The heating process takes place in a vacuum tubes collector, after which the hot water is stored in a well insulated water tank above the vacuum tubes. The hot water is obtained from the hot storage tank by connecting it to hot water pipe line. It consists of following main parts:

1)    Solar collector, either flat plate or evacuated collectors

2)    Insolated Water Tank

3)    Stand bye Electric Back up (In Advance Model)

4)    Digital Control (In Advance Model)

Solar water heater

2) Pressurized Water Heater System:

If there is pump installed in the water lines of a home to get water from taps with pressure then pressurized solar water heater is used for hot water. It has a cupper pipe inside hot water storage tank. In non pressure solar water is used for pressurized lines then hot water will mix with cold water in storage tank and therefore will not deliver hot water. In pressurized system the storage tank water does not mix with the hot water required by the user. The water in cupper coil is heated due to heat exchange between fresh water coming in the coil and the hot water stored in the insulated tank.


As shown in previous figure the water in the tank will be heated by vacuum tubes. The heat from tank water will be transferred to the water inside the copper coil which will be connected to the hot water line.

2) Split Solar Water Heating System:

In this system the solar collectors are mounted on the roof top, while the hot water tank is placed near the load i.e feed water tank or outside bathroom. There is a copper coil inside the 300lt~1000lts water tank in which hot water circulates. It has a temperature sensor on the outlet of collectors. When water is heated in collector the sensor gives signal to controller which switches on the circulating pump and hence circulation of hot water starts. The cold water in tank is heated up with this circulating hot water in the copper coil heat exchanger.

If the distance between load and solar hot water is quite large than the split solar system is recommended. This system can also be used for pressurized taps.

All the systems are backed up by electric heater for cloudy days.

FAQ about solar water heaters can be obtained on request.

Warranty: One year full warranty on parts against any manufacturing fault.


  • We are really glad to see the outcome of the installation at Unilever,  perhaps it is build up of new era in Pakistan w.r.t. Alternate Energy. It is hoped...

    Mian Rashid Mahmood, US Denim Mills (pvt) Ltd
  • Mr. Ibrahim Khan of SRS Energy Solution Provider,  whom I personally find him the best among other participants in terms of providing a better Energy...

    Zafar Iqbal
  • SRS was quite pleasant. The folks who came out knew their business. They took a look at my dwelling and my...

    Usman Riaz
  • One of the nicer aspect of solar systems is that there is very little maintenance required. Once a month...

    Numair Imran
  • After solar, my lowest electric bill was Rs.0

    Majid Shafiq

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