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What is the maximum number of SPRING panels that can be connected in series on the same branch?

Edited

It is important to distinguish between our two generations of SPRING currently available:

  • The SPRING3, with its polymer exchanger, sold from July 2022 in the following versions:

    • SPRING 425 Shingle Black insulated - DSTI425M12-B320SBB7

    • SPRING 425 Shingle Black non-insulated - DSTN425M12-B320SBB7
       

  • The SPRING4 with its aluminum exchanger, marketed from May 2024 in the following versions:

    • SPRING4 425 TOPCon insulated - DSTI425-108M10TB-03

    • SPRING4 425 TOPCon non-insulated - DSTN425-108M10TB-03

    • SPRING4 425 TOPCon with fins - DSTF425-108M10TB-03

For more details on the specifications of the models, you can refer to the dedicated article:

What material is used for the SPRING panel heat exchanger?

 

SPRING4

Up to 7 Dualsun SPRING hybrid solar panels can be connected hydraulically.

SPRING3

Up to 7 Dualsun SPRING hybrid solar panels can be connected hydraulically.

This number was determined by filling tests with the thermal camera to check for proper venting.

In order to purge the air properly, it is necessary to increase the filling rate to a level of:

  • 200 L/h/portrait panel

  • 250 L/h/panel in landscape

Be careful not to exceed the maximum pressure of 2 bar in the panels when filling.

 

>To go further : How to adjust the flow balancing of a Dualsun multi-field installation ?