Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
Solar Energy
Solar Wire Size Calculator
Estimates the minimum copper wire cross-section needed for a solar DC run based on system current, run length, and tolerable voltage drop. Use it as a starting point for code-compliant sizing before checking ampacity tables, conduit fill, and NEC 690 requirements.
Fill in the required fields to see your result.
Solar Energy
Solar Wire Sizing Calculator
Determine the correct AWG wire gauge for any run in your solar array based on current, distance, voltage, and temperature. Use this before purchasing cable to avoid dangerous overheating or efficiency-robbing voltage drop.
Fill in the required fields to see your result.
Key differences
| Solar Wire Size Calculator | Solar Wire Sizing Calculator | |
|---|---|---|
| Category | Solar Energy | Solar Energy |
| Inputs required | 3 | 5 |
| Result | Minimum Wire Size (AWG) | Minimum Wire Gauge (AWG) |
| What it does | Estimates the minimum copper wire cross-section needed for a solar DC run based on system current, run length, and tolerable voltage drop. Use it as a starting point for code-compliant sizing before checking ampacity tables, conduit fill, and NEC 690 requirements. | Determine the correct AWG wire gauge for any run in your solar array based on current, distance, voltage, and temperature. Use this before purchasing cable to avoid dangerous overheating or efficiency-robbing voltage drop. |