FSP EssenSolar CFS model User Manual
www.fsp-group.com.tw
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
）
3kVA/ 5kVA
1 x 12AWG
4
1.2 Nm
WARNING: Because this inverter is non-isolated, only three types of PV modules are acceptable: single
crystalline, poly crystalline with class A-rated and CIGS modules.
To avoid any malfunction, 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.
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 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
3kVA
5kVA
Max. PV Array Open Circuit Voltage
500Vdc
PV Array MPPT Voltage Range
120Vdc~450Vdc
Take 250Wp PV module as an example. After considering above two parameters, the recommended module
configurations are listed as below table.
Solar Panel Spec.
(reference)
- 250Wp
- Vmp: 30.1Vdc
- Imp: 8.3A
- Voc: 37.7Vdc
- Isc: 8.4A
- Cells: 60
SOLAR INPUT
Q'ty of panels
Total input
power
(Min in serial: 6 pcs, max. in serial: 13 pcs)
6 pcs in serial
6 pcs
1500W
8 pcs in serial
8 pcs
2000W
12 pcs in serial
12 pcs
3000W
13 pcs in serial
13 pcs
3250W
8 pieces in serial and 2 sets in parallel
16 pcs
4000W
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 PV wire cover to the inverter with supplied screws as shown in below chart.
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, this
inverter/charger will trig overload fault and cut off output to protect your appliance but sometimes it still causes
internal damage to the air conditioner.
