Pv Array Requirements - Offgridtec MPPT PRO-X Series User Manual

3.2. PV Array Requirements

3.2.1. Serial connection (string) of PV modules
As the core component of the solar system, the controller could be suitable for various types of PV
modules and maximize converting solar energy into electrical energy. According to the open-circuit
voltage (VOC) and the maximum power point voltage (VMpp) of the MPPT controller, the series
number of different types of PV modules can be calculated. The below table is for reference only.
MPPT PRO-X 10A and 20A:
System
VOC<23V
voltage
max.
12V 4
24V 4
System
voltage
max.
12V
24V
NOTE: The above parameter values are calculated under standard test conditions
(STC / Standard Test Condition: Irradiance 1000W/m2, Module Temperature 25℃, Air Mass1.5.)
MPPT PRO-X 30A and 40A:
System
VOC<23V
voltage
max.
12V 4
24V 6
48V 6
System
voltage
max.
12V
24V
48V
NOTE: The above parameter values are calculated under standard test conditions
(STC / Standard Test Condition: Irradiance 1000W/m2, Module Temperature 25℃, Air Mass1.5.)
36 cell 48 cell
VOC<31V
best max.
2 2
3 2
72 cell
VOC<46V
best
2 1
2 1
36 cell 48 cell
VOC<31V
best max.
2 2
3 4
5 4
72 cell
VOC<46V
best
2 1
3 2
3 2
MPPT PRO-X 10A | 20A | 30A | 40A
54 cell
VOC<34V
best max.
1 2
2 2
96 cell
VOC<62V
max. best
1
1
54 cell
VOC<34V
best max.
1 2
2 4
3 4
96 cell
VOC<62V
max. best
1
2
2
— 6 —
60 cell
VOC<38V
best max.
1 2
2 2
VOC>80V
1 1
1 1
60 cell
VOC<38V
best max.
1 2
2 3
3 3
VOC>80V
1 1
1 1
2 1
best
1
2
best
1
2
3