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WF21 SLIC Integrated Solar Panels

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WF21 Integrated Panels

The WF21 SLIC (SLim Integrated Collector) offers a standard 2.1 square meter that is thinner than most integrated panels on the market at only 92mm. What this means is a flusher looking integrated panel for the end customer and for the installer it means we can get an extra panel onto each panel in order to reduce transport costs. All this while still offering a great looking panel with high output per square meter.

Slimmer Panel Means Flusher Installation

SLIC 21 Features

  • Extremley flat design leads to smaller flashing sheets on the top edge, therby redusicng that surface area of roof required.
  • Small horizontal and vertical gaps with trim in the same colour as the flashing
  • Laser welded, full-surface absorbers made from copper
  • Highly-selective vacuum coating
  • Great appearance as they perfectly fit the available roof space
  • Seamless transition from collector to collector
  • "Riser tube" designed for good stagnation behaviour allows of r better anti-freeze protection and a low pressure drop with no thermal dilation problems
  • Optimum micro-climate inside the case by using timber as an ecological collector material

WF21 Technical Details

Gross area
2.08 m2
Aperture surface area
1.89 m2


1996 x 1004 x 92mm



Heat transfer fluid content

1.38 L

Output - Based on annual irradiance at Dublin Airport)

597 kWh/m2/annum (based on aperture area)

547 kWh/m2/annum (based on gross area)

1313 kWh/annum per panel

Optical efficiency
Lineal loss factor a1


Quadratic loss factor a2
Max operation pressure
10 bar
Modular flat collector for simple roof mounted installation at angles between 16 and 90
Weather resistant, wooden frame construction with an aluminium rear panel that guarantees long service life and great reliability.
Structured, low-iron solar float glass, 3.8 mm thick, with maximum light transmission of 91%.
Emission free mineral wool, 50mm thick
Copper/Aluminium, laser welded, Bluetec Eta Plus/ Tinoc Classic or Interpane / Sunselet.
Absorption: 0.95 Emission: 0.05
Collector sealing
Wooden profile system with double temperature, UV resistant silicone sealant
Stagnation temperature
200 C
Heat transfer fluid
Propylene glycol 40%
Nominal flow rate/collector
500 kg/hr

Kit Includes the Following

  • WF21 panels (2.08 m2 gross per panel)
  • Flashing and fixings as required
  • S1 Solar 10 pump unit with Integarted solar controller
  • Expansion vessel
  • Exp vessel wall bracket with check valve
  • Food grade glycol concentrate


  • Model: WF21_SLIC
  • 10 Units in Stock

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This product was added to our catalog on Monday 10 May, 2010.

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