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PV Connection
CAUTION: Before connecting to PV modules, please install a separately DC circuit breaker between the
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 shown below.
Model
X-4KW-M
WARNING: Because this inverter is non-isolated, are accepted: single crystalline, poly crystalline with class
A-rated and CIGS modules. To avoid any malfunctions, do not connect any PV modules with possible current
leakage to the inverter. For example, grounded PV modules will cause current leakage to the inverter. When
using CIGS modules, please be sure NO grounding connection.
CAUTION: It's requested to use PV junction box with surge protection. Otherwise, it will cause damage on
inverter when lightning occurs on PV modules.
PV Module Selection:
When selecting proper PV modules, please be sure to consider the following parameters:
1. Open circuit Voltage (Voc) of PV modules not to exceeds maximum PV array open circuit voltage of the
inverter.
2. Open circuit Voltage (Voc) of PV modules should be higher than the start-up voltage.
INVERTER MODEL
Max. PV Array Power
Max. PV Array Open Circuit Voltage
PV Array MPPT Voltage Range
Start-up Voltage
Take the 250Wp PV module as an example. After considering above two parameters, the recommended
module configurations are listed in the table below.
Solar Panel Spec.
(reference)
- 250Wp
- Vmp: 30.1Vdc
- Imp: 8.3A
- Voc: 37.7Vdc
- Isc: 8.4A
- Cells: 60
PV Module Wire Connection
Please take the following to implement PV module connection:
1. Remove insulation sleeve for about 7 mm on your positive and negative
wires.
2. We recommend using bootlace ferrules on the wires for optimal
performance.
3. Check polarities of wire connections from PV modules to PV input screw
terminals. Connect your wires as illustrated below.
Recommended tool: 4mm blade screwdriver
Wire Size
1 x 12AWG
SOLAR INPUT
Min in series: 6 pcs, max. in series: 12 pcs.
6 pcs in series
8 pcs in series
12 pcs in series
8 pieces in series and 2 sets in parallel
10 pieces in series and 2 sets in parallel
Cable (mm
)
Torque value（max）
2
4
X-4KW-M
5000W
500Vdc
120Vdc~450Vdc
150Vdc +/- 10Vdc
8
1.2 Nm
Total input
Q'ty of panels
power
6 pcs
1500W
8 pcs
2000W
12 pcs
3000W
16 pcs
4000W
20 pcs
5000W
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