Voltage Drop Calculator

DC voltage drop for solar wiring by AWG and length.

Current (A)

Voltage (V)

One-way length (ft)

Wire gauge

Estimates only. Verify with local codes, manufacturer specs, and a qualified installer.

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Continue sizing with a related tool.

Pick AWG for ampacity and max voltage drop.

Convert watts to amps for AC or DC circuits with optional power factor.

Panel watts and count from daily Wh and peak sun hours.