Step 1
Backup & site basics
These two numbers drive how big your battery and solar array need to be.
Advanced assumptions (battery & inverter efficiency)
Step 2
Load profile
Add every appliance you run. Mark the ones that must stay on during a power cut as "backup".
Backup load
| Appliance | Qty | Rated W | Load % | Hrs/day | Eff. W | Daily Wh | Backup | |
|---|---|---|---|---|---|---|---|---|
| No loads added yet — add your first appliance above. | ||||||||