Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
Electrical Home
Battery Backup Runtime Calculator
Estimate how many hours a battery backup system will run your devices during a power outage. Essential for sizing UPS systems, solar storage, and off-grid setups.
Fill in the required fields to see your result.
Electrical Home
Electrical Panel Load Calculator
Estimate the minimum service amperage your home's electrical panel needs based on lighting, kitchen appliances, and HVAC loads. Use this before upgrading a panel or planning a new home build.
Fill in the required fields to see your result.
Key differences
| Battery Backup Runtime Calculator | Electrical Panel Load Calculator | |
|---|---|---|
| Category | Electrical Home | Electrical Home |
| Inputs required | 5 | 3 |
| Result | Backup Runtime (hours) | Panel Capacity Needed (amps) |
| What it does | Estimate how many hours a battery backup system will run your devices during a power outage. Essential for sizing UPS systems, solar storage, and off-grid setups. | Estimate the minimum service amperage your home's electrical panel needs based on lighting, kitchen appliances, and HVAC loads. Use this before upgrading a panel or planning a new home build. |