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Watt If? Interactive battery calculator
Tap the appliances you want running during a brownout. We’ll show the battery you need, and you can adjust it to fit your budget.
Add appliances to see your battery size.
1 How many bedrooms?
2 Tap what should keep running
Not included: electric-car chargers and commercial equipment (cold storage, machines). Ask our engineers about those.
3 Your list
4 How long should they run?
Appliance
⚡ Heavy load: needs a bigger battery and inverter.