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 Inverter Size Calculator
Estimates the recommended AC inverter rating for a solar array based on DC capacity, target DC-to-AC ratio, and headroom for future expansion. Useful for new-system design, retrofit planning, and matching inverter specs to anticipated panel additions.
Fill in the required fields to see your result.
Key differences
| Solar Wire Size Calculator | Solar Inverter Size Calculator | |
|---|---|---|
| Category | Solar Energy | Solar Energy |
| Inputs required | 3 | 3 |
| Result | Minimum Wire Size (AWG) | Recommended Inverter Size (W) |
| 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. | Estimates the recommended AC inverter rating for a solar array based on DC capacity, target DC-to-AC ratio, and headroom for future expansion. Useful for new-system design, retrofit planning, and matching inverter specs to anticipated panel additions. |