8
5.
Make sure the wires are securely connected.
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
）
SP3000 Initial-P
SP5000 Initial-P
SP3000 Initial-M
SP5000 Initial-M
1 x 8AWG
10
1.6 Nm
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.
Model
SP3000 Initial-P
SP5000 Initial-P
Charging Current (PWM)
50Amp
System DC Voltage
24Vdc
48Vdc
Operating Voltage Range
30~32Vdc
60~72vdc
Max. PV Array Open Circuit Voltage
60Vdc
105Vdc
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 SP3000 Initial-P as an example to select proper PV module. After considering Voc of PV module not exceed
60Vdc and max. Vmpp of PV module close to 30Vdc or within 30Vdc ~ 32Vdc, we can choose PV module with
below specification.
Maximum Power (Pmax)
260W
Max. PV module numbers in series
1
30.9 x 1
≒
30 ~ 32
Max. Power Voltage Vmpp(V)
30.9V
Max. Power Current Impp(A)
8.42A
PV module numbers in parallel
6
50 A / 8.42
Total PV module numbers
1 x 6 = 6
Open Circuit Voltage Voc(V)
37.7V
Short Circuit Current Isc(A)
8.89A
Maximum PV module numbers in Series: 1
PV module numbers in Parallel: 6
Total PV module numbers: 1 x 6 = 6
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
manufacturer of air conditioner if it’s equipped with time-delay function before installation. Otherwise, SP Initial
Series will trig overload fault and cut off output to protect your appliance but sometimes it still causes internal
damage to the air conditioner.
