Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
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.
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 Load Calculator | Solar Wire Size Calculator | |
|---|---|---|
| Category | Solar Energy | Solar Energy |
| Inputs required | 5 | 3 |
| Result | Required Solar Capacity (kW) | Minimum Wire Size (AWG) |
| What it does | 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. | 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. |