Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
Solar Energy
Solar Roof Area Calculator
Determine how many solar panels fit on your roof by entering its dimensions, pitch angle, and usable area percentage. Ideal for homeowners and installers planning a new solar installation.
Fill in the required fields to see your result.
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.
Key differences
| Solar Roof Area Calculator | Solar Wire Size Calculator | |
|---|---|---|
| Category | Solar Energy | Solar Energy |
| Inputs required | 5 | 3 |
| Result | Maximum Panels That Fit (panels) | Minimum Wire Size (AWG) |
| What it does | Determine how many solar panels fit on your roof by entering its dimensions, pitch angle, and usable area percentage. Ideal for homeowners and installers planning a new solar installation. | 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. |