Sunline: a guarantee for your future

A – SELECTION OF THE PHOTOVOLTAIC CELLS (OPTIONAL)
This stage of the process makes it possible to classify the cells acquired from the external supplier. The subdivision can be carried out in two ways:

1. Testing at a pre-established voltage value and subdivision into classes on the basis of the current value measured.
2. Testing at the maximum power point. The subdivision makes it possible to prevent the formation of strings with nonuniform current values which would provoke a power loss in the module, an excess working temperature and accelerated deterioration of the module itself.

B – WELDING THE CELLS
This stage consists of welding tinned copper ribbons onto the front of the solar cell in correspondence with the print on the cell. Two methods can be used:

1. Manual, using electric welders and deposit of flux.
2. Automatic, with induction welding by infrared lamps, heated prods.

C – WELDING THE STRINGS AND BRASSES (CONNECTIONS)
This involves welding the cells and connections together in order to make the connections between the cells and the junction box. During this stage the operator must supervise to insure correct welding of the grid and between the grid and the connections. The latter are made by the operators at the equipped workstations.

D – VISUAL INSPECTION AND OPERATING TEST
During this stage the operator checks the cells and can repair or replace any damaged cells before final lamination, thereby preventing the production of rejects.

E – LAMINATION
The stage during which the sandwich is prepared: this is composed of hardened glass, a layer of EVA, cells, another layer of EVA and, finally, the appropriately treated backsheet/tedlar (or another glass sheet). The glass must be cleaned before lamination to aid the lamination stage and ensure the life and performance of the modules themselves.
When the sandwich has been prepared, it is placed in the laminator in order to:
1. Create a vacuum inside the chamber
2. Heat the panel to the polymerization temperature
3. Press the sandwich
4. Cool the panel (optional)

F – TRIMMING, FRAMING, SEALING AND MOUNTING THE DIODE BOX
This is the stage during which the sandwich obtained is trimmed, framed in the special aluminium frames and sealed, and the junction box is fitted on it.

G – CONTROL BY MEANS OF A SOLAR SIMULATOR
Using the simulator, the operator checks that the finished panel meets the electric specifications and technical parameters declared for marketing it, and that it complies with the relevant reference standards.