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3. Wiring and connection
a) Before this procedure, please read the operation instructions of the PV system carefully.
Make wiring by Multi-connecting cables between the PV modules in series or parallel
connection, which is determined by user’s configuration requirement for system power,
current and voltage.
b) PV module connected in series should have similar current. Modules must not be
connected together to create a voltage higher than the permitted system voltage(1500V
DC), as reference the maximum number of modules in series (N) can be easily calculated
by dividing the Maximum System Voltage of the modules by the respective Voc value of
the module. Any more please always take into consideration the variation of the voltage
under different temperatures, the Voc of the modules will be rise when the temperature
drops.
c) PV module connect in parallel should have similar voltage. As reference the maximum
number of modules in parallel (M) can be easily calculated by dividing the maximum rated
current (indicated in the electrical specification below) by Isc value of the module, and
then plus 1. Any more please always take into consideration the variation of the current
under different temperatures, the Isc of the modules will be rise when the temperature
goes up.
d) Open the connection box of the control system and connect the cabled from the PV arrays
to the connection box in accordance with the installation indication of the PV control
systems. The cross-sectional area and cable connector capacity must satisfy the
maximum short-circuit of PV system (For a single component, we recommended the
cross-sectional area of cables is 4mm2 and the rated current of connectors is more than
10A), otherwise cables and connectors will become overheating for large current. Please
pay attention: the temperature limit of cables is 90
℃
and the temperature limit of
connector 85
℃
.For field connection
，
we recommended the cross-sectional area of cables
is 4mm2 and the rated current of connectors is more than 10A)
e) All module frames and mounting racks must be properly grounded in accordance with
local and national electrical codes. Please refer to the below drawing. It is recommended
that the applied torque is 2.3 to 2.8N.m.
