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

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:

SPRING4

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

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:

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