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Solar Inverter Cable Voltage Rise Estimate

Estimate resistive voltage rise along an inverter export circuit and expose the route resistance and real-current component used by the simplified model.

Inputs

Inverter circuit

Choose single phase or balanced three phase; the voltage basis and conductor factor change accordingly.

Range: 1–100,000 V

Enter phase-to-neutral voltage for single phase, or line-to-line voltage for three phase.

Range: 0–100,000 A

Use the line current at the export condition. Positive current is treated as inverter-to-supply export.

Range: 0–100,000 m

Enter the one-way route length; the model applies the return path through its phase factor.

Range: 0–1,000 Ω/km

Use resistance for the installed conductor at the applicable operating temperature from verified cable data.

Range: 0–1

Reactance is omitted, so this factor only scales the resistive component. Enter the project operating value.

Result

Resistive current component (A)
32.00
Estimated voltage rise
5.15
Estimated resistive voltage rise (V)
11.86
One-way conductor resistance (Ω)
0.1853

Formula

Calculation logic

Formula definitions and substituted values.

Before relying on the result

  • Estimate voltage rise on a single-phase inverter circuit
  • Compare a three-phase route or conductor resistance
  • Estimate the resistive voltage rise and compare it with the applicable project criteria.

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Estimate the resistive voltage rise and compare it with the applicable project criteria.