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 Load Calculator
Calculate the total daily energy demand of your home's lighting, appliances, and HVAC to correctly size a solar system. Use this before getting solar quotes to know exactly how many kilowatt-hours per day you need to generate.
Fill in the required fields to see your result.
Key differences
| Solar Wire Size Calculator | Solar Load Calculator | |
|---|---|---|
| Category | Solar Energy | Solar Energy |
| Inputs required | 3 | 5 |
| Result | Minimum Wire Size (AWG) | Required Solar Capacity (kW) |
| 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. | Calculate the total daily energy demand of your home's lighting, appliances, and HVAC to correctly size a solar system. Use this before getting solar quotes to know exactly how many kilowatt-hours per day you need to generate. |