About
Backup Power Planner is a free tool that answers one question well: will this generator or power station run what I need when the power goes out?
Most sizing tools belong to a brand and recommend its own models, or hide the arithmetic behind a wizard. This one checks 11 generators and 11 power stations from several makers against your own list, and shows every step and source.
It has no accounts. Your plan lives in the page link and in your own browser. Appliance values come from the Honda and Champion wattage charts; model specs from manufacturer pages; safety guidance from the U.S. Consumer Product Safety Commission and Generac. See how we calculate and our sources.
Results are estimates for planning. They aren’t electrical advice, and they don’t replace your appliances’ nameplates or a licensed electrician.