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

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.

If these flow rates are not sufficient, please refer to What is the maximum allowable flow rate of DualSun panels?

I - Pressurized systems:

The isolation valve (6) is recommended to facilitate filling of a single line in case of multiple lines or to allow an intervention on a line without impacting the whole installation.

The filling valve (8) can be used to facilitate filling in the case of an installation on a flat roof or on the ground, with the possibility of handling and supplying energy to a mobile filling pump. The installation of filling valves allows to fill only a hydraulic line on which an intervention may be necessary, without isolating the rest of the installation.

1. In portrait single line:

1.1 Portrait with Portrait hydraulic links:

1.1.2. Portrait with Landscape hydraulic links:

1.2. In portrait - Multiple homogeneous lines:

1.2.1. Portrait with Portrait hydraulic links:

1.2.2. Portrait with Landscape hydraulic links:

1.3. In portrait - Multiple non homogeneous lines:

1.3.1. Portrait with Portrait hydraulic links:

1.3.2. Portrait with Landscape hydraulic links:

2. In Landscape:

2.1. In landscape single line:

2.1.1. Landscape with Landscape hydraulic links:

2.1.2. Landscape with Portrait hydraulic links:

2.2. In landscape - Multiple homogeneous lines:

2.2.1. Landscape with Landscape hydraulic links:

2.2.2. Landscape with Portrait hydraulic links:

2.3. In landscape - Multiple non homogeneous lines:

2.3.1. Landscape with Landscape hydraulic links:

2.3.2. Landscape with Portrait hydraulic links:

II - Direct pool heating systems (self-draining):

Reminder: Only panels in portrait with Portrait DN26 hydraulic links 

1. Homogeneous lines:

2. Non homogeneous lines:

Nota: Flow rate setting with isolation valve and flowmeter reading (vertical mounting mandatory)