Cable Voltage Drop Calculator
Calculate voltage drop for existing DC cable runs.
Voltage Drop Formula
VD = (2 x L x I x R) / 1000
VD = Voltage drop (V)
L = One-way length (ft)
I = Current (A)
R = Resistance (ohms/1000ft)
Voltage Drop Guidelines
| Application | Max Drop |
|---|---|
| PV Array to Inverter | 2% |
| Battery to Inverter | 2% |
| Charge Controller to Battery | 1% |
| Inverter to Loads | 3% |