How to use the Solar Array Current Calculator
The Formula
Current (A) ≈ array watts ÷ operating voltage. Use nominal MPPT voltage for string calculations, not open-circuit Voc.
Practical Example
Size conductors for 125% of continuous current where code requires. Pair with the DC Cable Size calculator for battery-side wiring.
About Solar Array Current Calculator
Current estimate
Current (A) ≈ array watts ÷ operating voltage. Use nominal MPPT voltage for string calculations, not open-circuit Voc.
Wire and fuse sizing
Size conductors for 125% of continuous current where code requires. Pair with the DC Cable Size calculator for battery-side wiring.
Frequently asked questions
Q: Should I use Isc or Imp? A: This tool uses power/voltage (~Imp). Fuse sizing often references Isc from panel labels.