How we pick products and data

Last reviewed October 21, 2026.

We don't pretend to have tested everything

Many "best generator" lists say every product was "tested" without showing any proof. We'd rather be clear: our recommendations are based on manufacturer specifications, checked against the official product page or manual, and on the math of your own appliance list. When we have hands-on experience with a product, we say so on that page.

The products we track

The planner currently compares 15 portable power stations and 14 generators from the brands most US buyers consider. For each one we record capacity, continuous and surge output, 240 V support, UPS switchover time, fuel type, noise and weight from the manufacturer. We add models when readers ask for them and re-check specs when new versions come out.

How the planner chooses

• A power station fits if its continuous output covers your running watts plus 10%, its surge rating covers your biggest motor start, and it has 240 V if your list needs it. The hours it lasts assume 85% of the battery reaches your outlets (the rest is lost in the inverter).
• A generator fits if its running watts cover your total plus a 20% safety margin, its starting watts cover your peak, and it has 240 V if needed. At altitude we reduce gas generator output by 3.5% per 1,000 ft.
• Among the models that fit, we show the smallest ones first. A bigger unit costs more, weighs more and burns more fuel for no benefit.
• Affiliate commissions play no part. Brands can't pay to be included.

Appliance wattage data

The 52 appliances in the planner use typical running and starting watts from generator manufacturers' wattage guides (Champion, Generac, Honda) and ENERGY STAR data. Real appliances vary, which is why you can type the watts from your own labels into the planner.

Found a mistake?

Email hello@lightsonguide.com. We fix confirmed errors quickly and update the date at the top of the page.