DUALSUN FLASH - Electrical Installation of PV System; Electrical Connection Methods

To connect the modules, special solar cables with a minimum diameter of 4 mm
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as well as the appropriate
connectors must be used. These cables must be UV and wear resistant. Avoid leaving cables exposed to the
elements or place them in a protective sheath.
Respect a minimum bending radius of 40 mm.
When connecting the connectors, it is important to ensure that they are connected in a watertight manner (mini-
mum IP67).
When handling these cables, make sure that the tools used are dry.
All modules are supplied with pre-installed bypass diodes to minimize hot spots and module current losses in
the event of (partial) shading.
CAUTION
Never connect or disconnect a live circuit
CAUTION
Never open the junction box
The junction box of the DualSun module contains bypass diodes which are in parallel connection with the cell
wires. If a hot spot occurs locally on one or more cells, the diode will enter into service to prevent the main
current from flowing through the hot cells in order to limit overheating and loss of performance of the module.
However, the bypass diode is not the overcurrent protection device.
If the LED appears to be out of order, the installer or system service agent should contact DualSun.
The type of diode is 20SQ045 (for SUNTER, the nominal current is 15A, the reverse peak voltage is 45V);
Replacement of a diode should only be carried out by qualified personnel.
The maximum rating of a fuse connected in series with a cell chain is generally 15A, but the specific rating of
the module can be found on the product label and in the product data sheet.
The diodes which are used as blocking diodes must have:
• Maximum average value tolerable by the junction [IF (AV)] above the maximum system current at the highest
operating temperature of the module.
Installation, use, maintenance manual DualSun FLASH
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