Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
Solar Energy
Solar Battery Sizing Calculator
Find the minimum battery bank capacity needed to power your home through cloudy days or outages. Use this when designing an off-grid or hybrid solar system and choosing between lithium or lead-acid batteries.
Fill in the required fields to see your result.
Solar Energy
Solar Battery Backup Calculator
Determines how many kilowatt-hours of battery capacity you need to keep essential appliances running during a grid outage. Use it when sizing a home battery bank paired with a solar array.
Fill in the required fields to see your result.
Key differences
| Solar Battery Sizing Calculator | Solar Battery Backup Calculator | |
|---|---|---|
| Category | Solar Energy | Solar Energy |
| Inputs required | 5 | 4 |
| Result | Required Battery Capacity (Ah) | Required Battery Capacity (kWh) |
| What it does | Find the minimum battery bank capacity needed to power your home through cloudy days or outages. Use this when designing an off-grid or hybrid solar system and choosing between lithium or lead-acid batteries. | Determines how many kilowatt-hours of battery capacity you need to keep essential appliances running during a grid outage. Use it when sizing a home battery bank paired with a solar array. |