DUALSUN FLASH - Electrical Fittings, Cables and Diodes

voltage (V
CO
) of each module when the ambient temperature is at its minimum value. Apply the tempera-
ture coefficient to know the V
CO
value at the temperature considered.
The maximum open circuit voltage of the string should never exceed the maximum system voltage.
See module data sheet.
Determination of the maximum number of modules that can be connected in series:
N = Maximum_voltage_system / 1.15.V
co
Where:
• N = Maximum number of modules in series
• V
co
= open circuit voltage of each module, when the ambient temperature is at its minimum value (refer
to the product technical sheet)
WARNING
If additional PV modules must be installed in string with DualSun modules, their power and
current must be equal to those of DualSun panels within the limits of manufacturers' toler-
ances
2. Wiring in parallel
For DualSun modules connected in parallel, a corresponding overcurrent protection must be used. To this
end, a DC voltage fuse must be used to avoid reverse current. Refer to the maximum reverse current value
in the product data sheet to determine the protection value. In addition, the operating conditions and design
rules of the inverter manufacturer must be observed.
CAUTION
Refer to the instructions of the inverter used
WARNING
For modules connected in parallel, only modules with the same nominal voltages will be
used
The electrical installation must be carried out by qualified personnel and in accordance with current safety
standards and IEC / EN 61730.
Refer to the grid operator requirements when installing the system.
The installation must be equipped with a circuit breaker to isolate at the same time all the cables that are
not grounded by a minimum spacing of 3 mm at the contact level.
4.2. Electrical fittings, cables and diodes
The DualSun solar modules are supplied with cables, connectors, and a pre-equipped junction box. Before in-
stallation, check that the plugs and connections are not damaged.
Connect the positive plug of a module to the negative plug of the next module; see identification of the polarity
of the MC4 connectors below:
Installation, use, maintenance manual DualSun FLASH
12