10
3.6 PV Connection
CAUTION:
Before connecting to PV modules, please install separately
a DC circuit breaker between inverter
and PV modules.
WARNING!
All wiring must be performed by a qualified personnel.
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
Typical Amperage
Cable Size
Torque
SPF 2000TL/
SPF 3000TL 24Vdc
50A
8 AWG
1.4~1.6 Nm
SPF 2000TL/
SPF 3000TL 48Vdc
30A
10AWG
1.4~1.6 Nm
SPF 4000TL
SPF 5000TL
80A
6 AWG
1.4~1.6 Nm
PV Module Selection:
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.
Solar Charging Mode
INVERTER MODEL
SPF 2000TL
SPF 3000TL
SPF 4000TL
SPF 5000TL
Battery Voltage
24V
48V
Max. PV Array Open Circuit Voltage
102Vdc max
145Vdc max
PV Array MPPT Voltage Range
30~80Vdc
60~115Vdc
Min. battery voltage for PV charge
17Vdc
34Vdc
Please follow below steps to implement PV module connection:
1.
Remove insulation sleeve 10 mm for positive and negative conductors.
2.
Check correct polarity of connection cable from PV modules and PV input
connectors. Then, connect positive pole (+) of connection cable to positive
pole (+) of PV input connector. Connect negative pole (-) of connection
cable to negative pole (-) of PV input connector.
3.
Make sure the wires are securely connected.
CAUTION:
Appliances such as air conditioner are required at least 2~3 minutes to restart because it’s
required to have enough time to balance refrigerant gas inside of circuits. If a power shortage occurs and
recovers in a short time, it will cause damage to your connected appliances. To prevent this kind of damage,
please check with manufacturer of air conditioner that if it’s equipped with time-delay function before
installation. Otherwise, this off grid solar inverter will trig overload fault and cut off output to protect your
appliance but sometimes it still causes internal damage to the air conditioner.
