What mounting systems can be used to install DualSun Spring panels on roofs?
Our DualSun Flash photovoltaic solar panel is compatible with all installation systems, whether portrait or landscape.
Our DualSun Spring hybrid solar panel, thanks to the very small size of the inter-panel connections, is compatible with a very large number of installation systems.
Compatibility tables with mounting systems:
For our DuaSun Spring panels, it is important in all cases to validate the installation system used before installation. The Spring panel can be installed in portrait or landscape (it is self-draining when installed in portrait only).
Which system for which roof?
There are as many systems for installing solar panels on roofs as there are types of roofs.
We distinguish 3 main families of roof installation systems:
- Super-imposition or simplified integration into the roof: Over the roof surface.
- Flat roof or terrace: On the roof surface.
- In -Roof integration : The entire installation system and panels replace the roofing.
It is also possible to imitate the in-roof integration for aesthetic reasons by installing the panels in overlay on a steel tray. The visual rendering is very close to an integrated rendering while eliminating any risk of leaks over time.
Here are the essential elements to check to determine the compatibility of DualSun Spring panels with an installation system:
1. Laying areas on the rails
The DualSun Spring hybrid modules have the particularity of integrating a heat exchanger, with hydraulic connections, on the back of a photovoltaic panel whose physical characteristics correspond to common photovoltaic panels, notably 35 mm thickness.
Care must be taken to ensure that the rails of the installation system do not interfere with the hydraulic connections, the areas of which are delimited in the plan below.
Authorised zones in blue (resistance up to 5,400 Pa) and red (resistance up to 2,400 Pa)
2. Raising the panels relative to the roof surface
It is necessary to ensure that the size of the hydraulic connections corresponds to the distance allocated by the laying system, between the surface of the roof and the lower edge of the module frame, which will be in contact with the mounting system.
Depending on the hydraulic nominal flow, two types of DualQuickfit fittings have been designed. Their size at the rear of the module is shown below.
The bulk of the hydraulic fittings on the rear side of the DualSun Spring panels is to be considered carefully to avoid contact of the fittings with the surface of the roof cover.
Tie the interpanel links to the modules or to the rails of the mounting system in order to avoid them to lay on the roof cover.
Please compare the following characteristics of the flexible hoses of the interpanel links with the allowable height:
Dint / Dext (mm)
15 / 21
26 / 32
Bending radius – Rb (mm)
To prevent them from resting on the roof covering, attach the hydraulic connections to the modules or rails of the laying system.
3. Possible connection configurations with hydraulic links
In order to facilitate their routing in a maximum of configurations, the DualSun hydraulic links have been developed to allow connection in portrait or landscape mode. It is thus possible to adapt the hydraulic links according to the desired layout and also to bypass obstacles between the panels and the roof.
Configuration 1: Panel mounted in portrait / Hydraulic links in portrait
Configuration 2: Panel mounted in portrait / Hydraulic links in landscape
Configuration 3: Panel mounted in landscape / Hydraulic links in landscape
Configuration 4: Panel mounted in landscape / Hydraulic links in portrait
Thus, the hydraulic connections can be oriented so as to avoid the rails of the mounting system or to adapt to the type of roof, in particular on trapezoidal sheet metal.
4. Trapezoidal sheet metal roofing
In the case of a trapezoidal sheet metal roof, the hydraulic connections can be positioned in a corrugation recess to limit the height of the modules.
The flexible hoses can either run perpendicular to the corrugations if the installation system raises the modules higher than the hose diameters, see Table in point 2 above, or run in the corrugation recess in the opposite case.
A detailed layout plan is then mandatory to ensure that the hydraulic connections do not interfere with the roof covering.
Reminder: Maximum 6 panels to create a hydraulic string
Checking the panel raising and positioning of the hydraulic links
See the characteristics of the DN15 hydraulic hose in the table in point 2 above .
The minimum elevation of the module with regard to the corrugation crest is 22 mm.
In this case, the edge of the hydraulic fitting can be placed 34 mm to the edge of the corrugation crest.
See the characteristics of the DN26 hydraulic hose in the table in point 2 above.
The minimum elevation of the module with regard to the corrugation crest is 36 mm.
In this case, the edge of the hydraulic fitting can be placed 60 mm to the edge of the corrugation crest.
Checking the roof layout
The positioning of the first module depends on the corrugation crest routing detailed above. Then check that each DualSun fitting is correctly positioned in the corrugation recess, according to the width of the inter-panel clamps, respecting the minimum distances for the routing of the hydraulic links through the corrugation crests.
Sheet metal roof with 333 mm corrugation length : Select an inter-panel distance of 16.67 mm if possible and place the end of the module 325 mm from the centre of the corrugation crest. The position of the modules will thus be identical in relation to the corrugation crests over the entire layout.
Checking the routing of the hydraulic links
Routing perpendicular to the corrugations – Configurations 1 and 3
The previous points allow to check the routing of the hoses perpendicular to the corrugations according to the characteristics of the DN15 or DN26 hoses, to the height of elevation of the modules and to the positioning of the hydraulic links in relation to the corrugations.
Routing parallel to the corrugations – Configurations 2 and 4
Routing through rails may occur according to the mounting system. In this case it is possible to run the hydraulic links beneath or from the side of the rails.
It is necessary to ensure that :
- The height between the rails and the roof surface is greater than the external diameter of the flexible hoses, see table in point 2 above.
- The bending radius of the flexible hose is greater than the minimum bending radius to avoid the rails, see table in point 2 above.
- The rails are at a sufficient distance from the hydraulic fittings to comply with the minimum bending radii of the flexible hoses within the permissible fixing areas, see point 1 above.
Rails avoidance in portrait:
Rails avoidance in landscape: