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Solar DC Cable Candidate Calculator

Compare documented cable candidates for loop voltage drop, loss, adjusted ampacity, terminal current and maximum circuit voltage without a fallback gauge.

Use this result well

Inputs that matter
Total outgoing plus return conductor length (m), Additional loop/contact resistance (Ω), Operating current for voltage drop (A), Required conductor/terminal ampacity (A), and 5 more
Output to expect
Finite solar DC cable comparison
  • Check the units and required inputs before comparing results.
  • Keep the assumptions with a copied result so you can reproduce the calculation later.
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Reference & details

How it works

Finite solar DC cable comparison

Compare actual conductor candidates using loop voltage drop, published resistance at the chosen conductor temperature, adjusted ampacity, terminal limits and voltage rating. Show every failing candidate without inventing a fallback gauge.

Loop resistance = total positive-and-negative conductor length × resistance per metre + extra loop resistance; drop = operating current × loop resistance; loss = current² × loop resistance.

Updated: September 2026

Example Scenarios

Try this example to see the calculation, then enter actual documented values and preserve the measurement conditions. A failed or unresolved comparison is part of the record.

→ 2 candidates meet the entered comparisons

FAQ

Compare actual conductor candidates using loop voltage drop, published resistance at the chosen conductor temperature, adjusted ampacity, terminal limits and voltage rating. Show every failing candidate without inventing a fallback gauge.

Use the exact equipment data, measurement point, operating conditions and units described in the selected mode. Record source documents, dates and unresolved conditions in Sources and assumptions. Built-in examples illustrate arithmetic; they are not manufacturer ratings or approved designs.

Use Save planning case for an explicit local history entry. Copy MD keeps current inputs and notes; Download CSV exports the result breakdown. Export portable copies before clearing storage and save a separate case after changing equipment, conditions or measurements.

About Solar DC Cable Candidate Calculator

Compare actual conductor candidates using loop voltage drop, published resistance at the chosen conductor temperature, adjusted ampacity, terminal limits and voltage rating. Show every failing candidate without inventing a fallback gauge.