Solar Cable Voltage-Drop Estimator

Screen a two-conductor direct-current route with the declared copper-resistivity model of 0.0175 Ω·mm²/m at 20°C. The estimator does not calculate ampacity, temperature correction, grouping derating, connector loss, or installation approval.

Back to Japanese Standard Solar Cable

One-way route length (m)

Design current (A)

Nominal conductor area (mm²)

System voltage (V DC)

Screening result

Enter the route inputs, then run the estimator.

Model: voltage drop = 2 × one-way length × current × 0.0175 ÷ conductor area. Use the project engineer’s cable data, operating temperature, installation method, termination details, and accepted voltage-drop limit for the final schedule.