15
WIRING INFORMATION
4.3.2
2 x Panels Connected In Parallel
4.3.3
2 Series Strings Connected in Parallel
For the example above:
PV Panel specifications
Maximum power: 310W
Maximum power voltage (Vmp): 37V
Maximum power current (Imp): 8,38A
Open circuit voltage (Voc): 45V
Short circuit current (Isc): 8,80A
2 x 310 W panels connected in parallel = 620W
2 x 12V 100Ah batteries in series = 24V 100Ah
Recommended MPPT as per table 3.2 = 40A MPPT charge controller
For the PV Parallel connection the voltage remains the same
Array max Voc = 45V :
This is within the max operating voltage of the MPPT and the max operating volts per battery
bank as per Table 3.3
For parallel connection the total current is the sum of all the panels in parallel
Total Isc = 8,8 x 2 = 17,6A
Use this current to calculate the minimum cable diameter from the PV array to the MPPT.
PV Panel specifications
Maximum power:200W
Maximum power voltage (Vmp): 24,6V
Maximum power current (Imp): 8,13A
Open circuit voltage (Voc): 30V
Short circuit current (Isc): 8,56A
Total Array Wattage = 6 x 200W = 1200W
Series string current per string = 8,13A
Total Array current ( Imp) = 16,26A
Total Array (Vmp) = 73,8V
Total Array (Voc) = 90V
