About StationSizer

StationSizer is an independent site based in Pennsylvania. It helps people work out how much battery backup they need before they spend $500 to $3,000 on a portable power station.

How we research

• We don't hands-on test. We don't claim to have used, lab-tested or photographed the products we list. Our value is the math and the data.
• Specs come from manufacturers. Every capacity, output, surge, weight and price figure is copied from the manufacturer's own product page on a stated date and linked. If a maker doesn't state something (for example, cell chemistry), we leave it blank rather than guess.
• Appliance wattages come from published generator-maker charts (Honda and Champion). Your appliance's nameplate is always more accurate.
• Assumptions are labeled. Our calculators use a 0.8 usable-energy factor and 1.2x inverter headroom. Those are our planning conventions, stated on every tool.
• No wiring advice. Connecting backup power to home circuits is a job for a licensed electrician.

Corrections

Specs and prices change. If you spot an error, contact us (email address coming at launch) and we'll fix it and note the date.