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PV Connection
CAUTION: Before connecting to PV modules, please install separately a DC circuit breaker between inverter
and PV modules.
WARNING! It's very important for system safety and efficient operation to use appropriate cable for PV
module connection. To reduce risk of injury, please use the proper recommended cable size as below.
Model
1KVA/2KVA/3KVA
5KVA
PV Module Selection: (Only for the model with PWM solar charger)
When selecting proper PV modules, please be sure to consider below requirements first:
1. Open circuit Voltage (Voc) of PV modules not exceeds max. PV array open circuit voltage of inverter.
Charging Current (PWM)
System DC Voltage
Operating Voltage Range
Max. PV Array Open Circuit Voltage
2. Max. Power Voltage (Vmpp) of PV modules should be close to best Vmp of inverter or within Vmp range to
get best performance. If one PV module cannot meet this requirement, it's necessary to have several PV
modules in series connection.
Maximum PV module numbers in Series: Vmpp of PV module * X pcs ≒ Best Vmp of Inverter or Vmp
range
PV module numbers in Parallel: Max. charging current of inverter / Impp
Total PV module numbers = maximum PV module numbers in series * PV module numbers in
parallel
Take 1KVA inverter as an example to select proper PV modules. After considering Voc of PV module not exceeds
50Vdc and max. Vmpp of PV module close to 15Vdc or within 15Vdc ~ 18Vdc, we can choose PV module with
below specification.
Maximum Power (Pmax)
Max. Power Voltage Vmpp(V) 17.6V
Max. Power Current Impp(A)
Open Circuit Voltage Voc(V)
Short Circuit Current Isc(A)
Maximum PV module numbers in Series: 1
PV module numbers in Parallel: 10
Total PV module numbers: 1 x 10 = 10
Take 2KVA/3KVA model inverter as an example to select proper PV module. After considering Voc of PV module
not exceed 80Vdc and max. Vmpp of PV module close to 30Vdc or within 30Vdc ~ 32Vdc, we can choose PV
module with below specification.
Maximum Power (Pmax)
Max. Power Voltage Vmpp(V)
Max. Power Current Impp(A)
Open Circuit Voltage Voc(V)
Short Circuit Current Isc(A)
Maximum PV module numbers in Series: 1
PV module numbers in Parallel: 6
Total PV module numbers: 1 x 6 = 6
Wire Size
Cable (mm
1 x 8AWG
85W
4.83A
21.6V
5.03A
260W
30.9V
8.42A
37.7V
8.89A
Torque value（max）
2
)
10
50Amp
12Vdc
24Vdc
15~18Vdc
30~32Vdc
55Vdc
80Vdc
Max. PV module numbers in series
1 è 17.6 x 1 ≒ 15 ~ 18
PV module numbers in parallel
10 è 50 A / 4.83
Total PV module numbers
1 x 10 = 10
Max. PV module numbers in series
1 è 30.9 x 1 ≒ 30 ~ 32
PV module numbers in parallel
6 è 50 A / 8.42
Total PV module numbers
1 x 6 = 6
10
1.6 Nm
48Vdc
60~72vdc
105Vdc
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