How to Use the "What Size Power Station Do I Need" Calculator
List each device you want to power along with its wattage and daily hours of use, set how many days of backup you want, and the calculator totals your energy needs and recommends a capacity rounded up to the nearest common commercial tier.
The tool is built around a realistic device list rather than a generic estimate, so the accuracy of the recommendation depends on how complete and honest that list is.
Deciding what belongs on your list
As covered in the essentials-only guide, most people get the most useful recommendation by listing only what they'd genuinely want running during a real outage, rather than every appliance they own.
Choosing days of backup based on your real risk
As covered in the frequent-vs-rare-outage guide, set the days slider based on your area's realistic outage pattern rather than an arbitrary worst case, unless you specifically want to plan for a rare, extended event.