DC Wire Sizing & Voltage Drop

Solar Cable Size Calculator

Calculate proper American Wire Gauge (AWG) size and mm² cross-section to keep DC cable voltage drop strictly under 2.0%.

DC Circuit Specs

Specify operating voltage, current, and one-way cable run distance.

Circuit Current (Amps)

Circuit Voltage (V DC)

One-Way Wire Length (Feet)

Max Allowed Voltage Drop

Recommended Wire Gauge

8 AWG

Copper PV Solar Cable (8.37 mm²)

Calculated Voltage Drop: 0.78 V (1.63%)

Voltage at Load Terminal: 47.22 V DC

Continuous Wire Heat Loss: 23.5 Watts