What are the DualQuickFit interpanel connectors ?

To connect SPRING panels to each other, DualSun has developed DualQuickfit quick couplings, mounted on flexible lines packaged in the form of crowns.
These couplings have been designed to be very simple and quick to connect hydraulically: this is a key point for a quality installation. 


The tightness of the DualQuickfit couplings has been tested and proven during thermal pressure cycling during the tests related to the passage of the EN 12975 standard corresponding to the SOLAR KEYMARK.

These flexible lines are pre-assembled with a flexible DN15 or DN26 hose, depending on the nominal flow rate required, see table below, and with DualQuickfit quick couplings, portrait or landscape, depending on the layout of the installation.


  Raccord_DualQuickfit_portrait.png Raccord_DualQuickfit_paysage.png

Flow rate

DualQuickfit portrait coupling

DualQuickfit landscape coupling

DHW = 60L/h/panel



Pool discharge / Heat pump coupling = 100L/h/panel

DN15 ou DN26


Direct pool heating = 200L/h/panel




Technical characteristics of DualSun DualQuickfit links


The DualQuickfit inter-panel connection of the DualSun SPRING hybrid solar panel is made of a flexible hose and DualQuickfit quick fittings.

It's UV resistance has been tested:

  • in accordance with 1431-1 ("Vulcanized or thermoplastic rubber - Resistance to ozone cracking - Part 1: Tests under static and dynamic elongation)
  • in thermal cycling (TC200) under pressure at 1.5 bar from -40 ° C to + 85 ° C according to IEC 61215: 2016 and 61730: 2016

DualQuickfit quick fittings are made of injected polypropylene with 30% glass fiber.



In a pressurized (P)  system the flexible hose is an EPDM hose with internal x external dimensions: 15mm x 21mm. 

In domestic hot water supply system the flexible hose is an EPDM hose with internal x external dimensions : 26mm x 32mm.


Inter-coupling distance of the SPRING inter-panel links

The DualQuickfit inter-panel link spacing has been defined to facilitate the connection of the links to the DualSun SPRING panels.

Distance between each coupling on each DualQuickfit link type:

  Portrait Landscape
  DN15 DN26 DN15 DN26
SPRING 300 1062 mm 1062 mm 1710 mm -
SPRING 375 1210 mm 1210 mm 1710 mm -
SPRING 425 1160mm 1160 1960 -


Number of connectors per panel

Two hydraulic connectors are required for each SPRING panel. The details can be found in the SPRING installation manual, which details the key steps for the proper installation of Spring panels.


Installation of DualQuickfit links

It is possible to connect hydraulically up to 7 hybrid solar panels DualSun SPRING.

Install the inlet/outlet fitting kit on the DualQuickfit hydraulic links according to the layout plan before installing them on the panels onto the roof.

Be sure to insert the DualQuickfit fitting straight into the SPRING panel manifold.



Previous DualQuickfit references 

SPRING 375  VS SPRING 300-3150

The DualSun DualQuickfit connections are identical between the SPRING 300-315 and SPRING 375 Shingle panels, only the distance between connections in portrait is different. In fact, the DualSun SPRING 375 Shingle panels are significantly wider than the SPRING 300-315 panels.

SPRING 300-315 VS SPRING 280

DualSun DualQuickfit connections are different between SPRING DualSun SPRING 280 panels and DualSun SPRING 300 - 315 panels. was designed by DualSun engineers. The SPRING 300-315 fitting is therefore fixed by 4 claws which grip the collector. And the SPRING 300-315 fitting seal is now on the fitting end to be inserted into the manifold.

This notably guarantees broad compatibility with roof installation systems.


>>To go further : What are the different hydraulic layouts with DualSun?





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