What Size Power Station Do You Actually Need for a Weekend Power Outage?
For a typical 1-3 day outage covering the essentials most households actually prioritize (a refrigerator, phone charging, some lighting, and perhaps a CPAP or router), total daily energy use commonly lands somewhere in the 1,000-2,000Wh range, which — after the standard efficiency margin — points to a power station in the 1,500-2,500Wh capacity range as a reasonable starting point for most people, though your own device list and hours of use should always be run through the calculator directly.
This is the range where most people shopping for backup power actually land once they list out only what they genuinely need, rather than every appliance in the house.
Why the essentials-only list keeps the number reasonable
A refrigerator (with its duty cycle, as covered in the runtime guide), a few hours of phone and laptop charging, and some lighting adds up to a modest daily total — it's adding high-wattage appliances like space heaters, air conditioners, or full cooking equipment that pushes the recommended capacity dramatically higher, often beyond what a single portable power station reasonably covers.
Building in a realistic backup margin
Sizing for slightly more than your minimum calculated need — enough for an extra half-day beyond your expected outage length — is a reasonable, low-cost safety margin, since outages don't always end exactly when forecast and a power station with some headroom left avoids anxiously rationing power near the end.