ITS 20 Tube Collector

ITS 20 Tube Collector


Save Electricity and Go Green

1. For geysers from 150L to 300L
2. An investment that adds value to your home

Evacuated tubes are used for Solar Water Heating

"*" indicates required fields

SKU: ITS 58/1800-20 Category:


The evacuated tube heat pipe solar collector is the cutting edge technology when it comes to solar water heating panels. Combining the incredible insulating properties of a vacuum with the latest technology in selective absorptive coatings this product offers the highest thermal output even under the worst of weather condition. The round absorber area provides for passive solar tracking ensuring a very optimal and even thermal output from sunrise to sundown.

ITS Solar is known to be a leader in the design of evacuated tube solar collectors and outsources the manufacturing to an industry leading factory. The result is a product that stands head and shoulders above the rest. The ITS 58/1800 series is available in 10,15,20 and 30 tube collectors.

Key Features:

Model ITS – 58/1800 – 20 Tube Collector

  • Class leading efficiency – Through careful design ITS is able to offer class leading efficiency on our collectors. Unlike many of our competitors, we are not only manufacturing a panel that is aesthetically pleasing, but we also utilize the proper materials and material thicknesses on the inside of the collector to ensure a high thermal output even after decades of operation.
  • Sleek low profile design – Designed to be aesthetically pleasing and with minimal visual impact and wind resistance.
  • Beautiful finish – ITS uses only high quality finishing materials on our products to ensure the product will even after years of exposure to the outside elements still remain as good looking as the day you bought it.
  • Superior corrosion resistance – ITS uses high purity metals and quality finishes in the manufacturing of our collectors to ensure superior corrosion resistance.
  • Freeze resistance – ITS collectors are designed to withstand the harshness of European winters and our heat pipe technology has a special environmentally friendly antifreeze solution in ensuring trouble free operation even at temperatures of -40°C.
  • Hail resistance – Made from top quality 2.2mm thick borosilicate glass the tubes of the ITS evacuated tubes collectors can withstand direct hailstone impacts from stones as big as 38mm without any damage.
  • Easy installation and maintenance free operation – ITS solar collectors are designed with a mounting frame that is very easy to assemble and have easy clip-closed vacuum tube fastening caps that ensures easy installation. The collector also includes a dedicated temperature sensor pocket for easy integration with a system controller. ITS collectors are designed to be maintenance free.
  • 5 year warranty – ITS evacuated tube technology comes standard with a 5 year warrantee. Due to our glass-to-glass vacuum sealing techniques and high quality material the products have a life expectancy of more than 20 years. ITS solar collectors have survived rigorous testing by both the SABS and Fraunhofer Institute Solare Energiesysteme in Germany.

Additional information

Number of Tubes


Tubes Distance


Dimensions (mm)

1625 x 2000 x 110

Aperture Area

1.86 m2

Absorber Area

1.62 m2

Total Energy Rating

4.17KWhr / m2 /day

Net Weight

71 kg

Pipe Connections

22 mm

Pressure Resistance

6 Bar

Freezing Tolerance

Minus 35 Degrees

Stagnation Temperature

250 °C

Fluid Content

1.28 L

Tile Angle Limited

15 – 75 °C

Heat Transfer Medium

Water – Glycol Solution


5 years

Life Expectancy

> 25 Years


How Does A Solar Thermal System Work?2021-03-26T10:58:06+02:00

A solar thermal system consists of two main components; a solar collector and a hot water storage tank.

The solar collector, located on the roof, collects the suns energy and transfers the heat to the storage tank. The storage tank allows the hot water to be stored until it is used at night or in the morning.

If the storage tank (geyser) can be mounted higher than the solar collector, the rising of the hot water can cause the transfer of the heat from the collector to the tank. This is called a thermosiphon system. If the storage tank is mounted lower than the solar collector a circulation pump and differential temperature controllers is required. This is called a pumped system.

What is the Life Expectancy of A Solar System?2021-03-26T11:03:42+02:00

The life expectancy of a solar collector is typically 20 years while the storage tank (geyser) is 5 years.

What is the Average Return on Investment for A Solar Thermal System?2021-03-26T11:03:24+02:00

Solar hot water systems can save the home owner or business a substantial amount of money and drastically reduce global warming. At current energy prices, these systems can pay for themselves in 2-5 years, depending on the application.

How Long Will it Take to Install A Solar System?2021-03-26T11:02:28+02:00

On average it takes less than a day to install a solar system.

How Much Maintenance and Service is Required?2021-03-26T11:01:38+02:00

Our solar technology requires almost no maintenance except for making sure the collector surface is clean. We do however recommend that the system be checked annually to ensure that you are getting the best possible efficiency out of the system.

What Maintenance Does Solar Thermal Systems Require?2021-03-26T10:58:06+02:00

Modern solar systems are designed to be maintenance free but due to poor water quality in some areas and dust cleaning is needed. ITS recommends an annual check-up of the system to ensure that your system is providing you with the biggest possible saving. During this check-up the collector surface can then also be cleaned and de-scaling can be done.

What Happens if A Tube Breaks on an Evacuated Tube Collector?2021-03-26T11:02:47+02:00

On our evacuated tube heat pipe solar collectors the system will remain operational. The efficiency of the system will be reduced by the percentage surface area lost. Replacing the broken glass tube is a very simple and inexpensive operation.

Will A Solar Hot Water Heating System Work on A Cloudy Day?2021-03-26T11:02:36+02:00

Yes. Although the heat output of the solar collector is reduced on overcast days it will still be able to provide heating. Approximately 25-30% of the suns energy actually gets through the clouds.

Can I Connect A Solar Water Heating System to My Existing Geyser?2021-03-26T11:00:35+02:00

Yes. ITS manufactures a special conversion valve to change your normal geyser into a solar geyser.

What are the Advantages of Evacuated Tube Solar Collectors Over Flat PLate Collectors?2021-03-26T11:00:17+02:00

ITS evacuated tube and ITS flat plate solar collector products are both of very high standard and offer superior performance when compared to many other brands on the market. There are a lot of different arguments about which type of collector is better and unfortunately this is often driven by what technology that company sells and not based on facts. Evacuated tube collectors are more efficient in high temperature application and is frost resistant. Flat plate collectors are more cost effective and great for normal household geyser temperatures. Frost protection must however be provided by a solar controller or glycol in an indirect system configuration.

How Much Will Your Solar Heating System Help the Environment?2021-03-26T11:00:06+02:00

On average for every 1kWh of energy produced by a coal power station, 0.966kg of carbon dioxide is produced. Now, a good quality solar system with 3m2 of solar collector area will on average generate 7kWh of thermal energy per day. Therefore, you will personally be responsible for saving our environment of another 2470 kg of carbon dioxide per year. Carbon dioxide traps heat in our atmosphere, contributing to the greenhouse effect, which alters our planet’s climate and ecological systems. Using solar energy in place of non-renewable fuels may also reduce nitrous oxides and sulphur dioxides, which are components of smog.


Technical Specs Why Choose ITS

Flat Plate vs Evac Tube

  1. Why solar water heating?
  2. How does solar water heating work?
  3. Solar water heating basics
  4. How does an evacuated tube solar collector work?
  5. Solar vs Heat pump savings?
  6. PV geyser element vs flat plate solar collectors
  7. Choosing the correct installer
Go to Top