Compare calculators
Both calculators run independently β change the inputs on either side to compare results.
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.
Solar Energy
Solar System Sizing Calculator
Calculate the solar array size in kilowatts needed to cover a chosen percentage of your electricity usage. Use this before contacting installers to arrive with an informed system size estimate.
Fill in the required fields to see your result.
Key differences
| Solar Inverter Size Calculator | Solar System Sizing Calculator | |
|---|---|---|
| Category | Solar Energy | Solar Energy |
| Inputs required | 3 | 4 |
| Result | Recommended Inverter Size (W) | Required System Size (kW) |
| What it does | 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. | Calculate the solar array size in kilowatts needed to cover a chosen percentage of your electricity usage. Use this before contacting installers to arrive with an informed system size estimate. |