ATAG iSOL Solar Collector


The ATAG iSol solar flat panel range is the most efficient in the UK and due to our engineering and design technology, they will even perform on cloudy days. Also they are Solar Keymark approved meaning they’ll qualify for any government grants or payback initiatives that may be available.
Solar thermal is one of the more effective and efficient renewable energy sources and can provide you with an abundance of free hot water.

With the UK classified as a temperate climate, we actually receive around 65% of the amount of solar radiation that is received in southern Spain.

Heating a tank of stored hot water accounts for roughly 60% of our annual hot water bills* so it makes sense to capture this free energy from the sun, both from an environmental and financial perspective. *Energy Saving Trust
The ATAG iSol range of solar flat panels are installed with minimum disruption, are high performing, low maintenance, extremely robust and come with a 10-year warranty.

Completing the ATAG iSol range is our pumping station and easy to use intelligent controls. If installed with an ATAG iS or iR boiler and iSteel twin coil hot water cylinder, you will have a super-efficient and extremely reliable solar thermal installation.

What’s more you will have significantly reduced your carbon footprint as well.

iSol solar collector (m²) Aperture area (m²) Solar efficiency (%)
1.6 1.46 84
2.5 2.28 86
Features Benefts
Absorber with highly selective coating Very effective coating to maximise efficiency
Large effective surface area To gain as much of the sun’s energy
One universal collector One collector for all, in-roof, on-roof & flat roof
More than one collector installed in series Maximum of 4 collectors in series to suit different size property
Simple mounting options Timesaving ease of installation
Black anodized frame and roof mounting components Aesthetic design
Solar Keymark certified Solar Keymark is equivalent to Microgeneration Certification Scheme (MCS) –
panel is eligible for payback incentives like RHI

Part Numbers

iSol 2 Panel In-Roof Pack comprises:

iSol Solar Collector 1.6m2 2.5m2
Aperture area (Asol) m2 1.46 2.28
Solar Efficiency (Eo) % 84 86
First-order coefficient  (a1) W/(m2K) 4.130 3.688
Second-order coefficient (a2) W/(m2K) 0.015 0.021
Incidence angle modifier (IAM) 0.91 0.96
ErP Solar Efficiency  (hcol) % 65 67

Fixing Options

ATAG’s iSol fixing kits ensure the iSol collectors can be swiftly and neatly installed into the roof. With the tiles taken away from a section of the roof, the in–roof kit enables the solar collectors to blend into the roof line and can be installed in a portrait position Able to sit above the roof tiles by using special on-roof solar collector brackets, ATAG ensures minimal disturbance to roof tiles. The flat roof ‘A’ frame gives you the option of a solar thermal system where a pitched roof is not suitable or available, but a flat roof location is.

In-Roof Installation
Portrait Only

On-Roof Installation
Portrait or Landscape

Flat Roof Installation
Portrait or Landscape

  • Ensures swift and neat installation into the roof – with minimal disturbance
  • Allows the iSol solar collectors to blend into the roof line
  • ‘A’ frame fixings suitable for a flat roof location


Pump Station

ATAG’ s Basic & Advanced pre-assembled, single lined  pump station has a sophisticated control system, ensuring householders get the best performance from the iSol solar system, maximising the amount of hot water generated.

Pump Station Key Features

  • Fill and drain valves
  • Safety assembly with connection for the diaphragm-type expansion vessel, safety valve and pressure gauge
  • ERP ready modulating pump
  • Up to 4 temperature sensors Pt1000
  • heat metering (with optional sun monitoring system)
  • function control
  • VBus®  (option for live and recorded data via internet)
  • Ease of operation
  • Installation-friendly housing with attractive design
  • Optional speed control, operating hours counter and thermostat function.
Functionality Basic Advanced
Control asynchronous pump
Control PM-pump (PWM)
Holiday function
Status LED
SD-card slot (Copy parameter/data logging)
Multilingual LCD
Detailed fault information
Test routine function
SuMoSy Basic sun monitoring system (option)
SuMoSy Solar Circuit sun monitoring system (option)
V-bus port connection
Datalogger (internet, option)
Boiler burner condition function
Legionella prevention function
Priority cylinder 1/cylinder 2
East/West program
2e pump control
3-way valve control
Find out what type of boiler you have
"Best decision I made in having it installed. Works efficiently for my family and our requirements"
Mrs Simmons St Albans, Herts