Next Victor NM-II 3.2KW 24V PF1 - Installation Guide; PV Connection and Module Setup

9
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
Wire Size
Cable (mm
2
)
Torque value（max）
1 x 8AWG
10
1.6 Nm
3KW/
5KW
PV Module Selection: (Only for the model with MPPT solar charger)
When selecting proper PV modules, please be sure to consider below parameters:
1. Open circuit Voltage (Voc) of PV modules not exceeds max. PV array open circuit voltage of inverter.
2. Open circuit Voltage (Voc) of PV modules should be higher than min. battery voltage.
INVERTER MODEL
3KW
5KW
Max. PV Array Open Circuit Voltage
500
Vdc
PV Array MPPT Voltage Range
12
0~
450
Vdc
Take 250Wp PV module as an example. After considering above two parameters, the recommended module
configurations for 3KW and 5KW are listed as below table.
Maximum Power (Pmax) 250W
8 pieces in serial and 2 sets in parallel
Max. Power Voltage Vmpp(V) 30.1V
Max. Power Current Impp(A) 8.3A
Open Circuit Voltage Voc(V) 37.7V
Short Circuit Current Isc(A) 8.4A
PV Module Wire Connection
Please follow below steps to implement PV module connection:
1. Remove insulation sleeve 10 mm for positive and negative conductors.
2. Suggest to put bootlace ferrules on the end of positive and negative wires with a
proper crimping tool.
3. Fix strain relief plate to the inverter with supplied screws as shown in below
chart.
4. Check correct polarity of wire connection from PV modules and PV input connectors. Then, connect positive
pole (+) of connection wire to positive pole (+) of PV input connector. Connect negative pole (-) of
connection wire to negative pole (-) of PV input connector. Screw two wires tightly in clockwise direction.
Recommended tool: 4mm blade screwdriver