Choose a home inverter by adding the running watts of everything you’ll power at once, then adding 20–30% surge headroom.
For the full breakdown, see our best 2000 Watt Pure Sine Wave Inverter guide.
Most buyers pick an inverter by total household wattage and end up with a unit that’s either too big to afford or too small to start the fridge. The decision of how to choose an inverter for home use comes down to one calculation: what runs at the same time, and what does it draw when it starts. Nail those two numbers and you’ll buy exactly the size you need.
How Much Power Do You Actually Need?
The right size is the running wattage of everything you’ll switch on together, period. Make a list of the appliances you’ll run at the same time during an outage — lights, a refrigerator, a TV, a phone charger — then find each device’s wattage on its physical label or in the manual. When the label only shows volts and amps, use Watts = Volts × Amps; a typical U.S. circuit runs 120 volts, so a 5-amp appliance draws about 600 watts.
Add those running watts together. That total is your baseline, not your final answer. The table below shows the size ranges that common home setups land in.
| Home Setup | Typical Simultaneous Loads | Common Size Range |
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