Pv Connection - MPP Solar 3KVA User Manual

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
3KVA
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.
Max. PV Array Open Circuit Voltage
Recommended PV Array MPPT Voltage Range: Vmp*
Max. charging current
Note: * Vmp: panel max power point voltage.
The PV charging efficiency is maximized while PV system voltage is close to Best Vmp.
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
After considering Voc of PV module not exceed 60Vdc and max. Vmpp of PV module close to 60Vdc or within
30Vdc ~ 50Vdc, we can choose PV module with below specification.
Maximum Power (Pmax)
Max. Power Voltage Vmpp(V)
Max. Power Current Impp(A)
Open Circuit Voltage Voc(V)
Short Circuit Current Isc(A)
Maximum PV module numbers in Series: 1
PV module numbers in Parallel: 3
Total PV module numbers: 1 x 3 = 3
Please follow below steps to implement PV module connection:
1. Check the input voltage of PV array modules. The acceptable input voltage of the inverter is 60VDC (with
rated load). Please make sure that the maximum current of each PV input connector is 13A.
2. Disconnect the circuit breaker.
3. Assemble provided PV connectors with PV modules by appropriate crimping tool and
spanner. Prepare the cable and assemble connector as following process:
Strip one cable 8 mm on both end sides and be careful NOT to nick conductors.
Insert striped cable into female terminal and crimp female terminal as shown below.
Insert assembled cable into female connector housing as shown below.
Typical Amperage
25A
250W Max. PV module numbers in series
30.9V
1  30.9x 1 ≒ 30 ~ 50
8.42A PV module numbers in parallel
3  25 A / 8.42
37.7V
Total PV module numbers
8.89A
1 x 3 = 3
7
Cable Size
12 AWG
60VDC
30~50VDC
Torque
1.4~1.6 Nm
25A