14
WIRING INFORMATION
4.3
Basic MPPT Wiring Diagram Examples
PV Panel
MPPT Charge
Controller
Battery
Inverter
The total array power is the sum of the power of all the panels connected in series and parallel.
4.3.1
2 x Panels Connected in Series
For the example above:
PV Panel specifications
Maximum power:100W
Maximum power voltage (Vmp): 17.4V
Maximum power current (Imp): 5.74A
Open circuit voltage (Voc): 20.8V
Short circuit current (Isc): 6.49A
2 x 100 W panels connected in series = 200W
2 x 12V 100Ah batteries in series = 24V 100Ah
Recommended MPPT as per table 3.2 = 20A MPPT charge controller
Series connection the voltage is equal to the sum of all the panels in series
Array max Voc = 2 x 17,4V = 34,8V :
This is within the max operating voltage of the MPPT and the max operating volts per battery
bank as per table 3.3
For series connection the total current remains the same
Total Isc = 6,49A
Use this current to calculate the minimum cable diameter between the panels and the
MPPT.
