Free tools
PV string calculator
Select a module (or enter a datasheet), set how many are in series and parallel, then set minimum and maximum cell temperature. The calculator returns power, voltage and current at STC, Tmin and Tmax.
Free tools/PV string calculator
Results
18-module array — P, V and I
18 in series × 1 parallel at -5 °C to 70 °C cell temperature.
P at STC
10,35 kW
Array Pmp at 25 °C
P at Tmax
9,00 kW
Power falls with temperature
Voc max (Tmin)
984,5 V
Must stay below inverter Vdc max
| Quantity | STC 25 °C | Tmin -5 °C | Tmax 70 °C |
|---|---|---|---|
| Pmp | 10 350 W | 11 250 W | 8 999 W |
| Voc | 915,8 V | 984,5 V | 812,8 V |
| Vmp | 761,8 V | 828,0 V | 662,4 V |
| Isc | 14,31 A | 14,12 A | 14,60 A |
| Imp | 13,59 A | 13,41 A | 13,87 A |
Vmp min (Tmax)
662,4 V
Keep this inside the inverter MPPT window
Isc max (Tmax)
14,60 A
Size DC fuses and cable for this current
Voltage and current are scaled linearly with the module temperature coefficients. Irradiance is assumed at STC. These calculators are free design aids, not a substitute for the published standard, manufacturer data, or a competent person.