Best Picks · By scenario
Best backup power, by scenario
Generic top-ten lists size nothing. These pages start from the actual job — the CPAP, the sump pump, the van, the dish — work the power math in the open, and only then name gear.
Pick your situation
Best Backup Power for CPAP Machines
A full night of sleep therapy on battery: the 30–60W math, the heated-humidifier fork in the road, and the medical caveats that matter.
Best for: anyone whose outage plan starts with "the CPAP cannot stop."
PF-B2Best Battery Backup for Sump Pumps
Surge rating first, watt-hours second: what a pump motor really demands from a battery, and where a portable station honestly stops being the answer.
Best for: basements that flood when the same storm cuts the power.
PF-B3Best Power Station for RV & Vanlife
A worked daily energy budget for life on the road — fridge duty cycles, the recharge habit that beats a bigger battery, and 12V-first watt-stretching.
Best for: rigs where the battery is the grid.
PF-B4Best Backup Power for Starlink & Home Internet
From a 15W router to a full satellite dish: sizing for an evening, a workday, or around the clock — and when duty-cycling plus solar beats capacity.
Best for: staying online when the grid is not.
How these picks work
Every product on these pages comes from the same small catalog behind our comparison hub — specific models we recommend by class, chosen for the job, never ranked by commission. Every runtime and capacity figure is computed with the same published formulas as our calculators (85% inverter efficiency, 10% reserve), and every wattage traces to the Device Wattage Library. We have not hands-on tested these units, and we say so on every page — verify current specs and prices on the listing before buying. The full method is on How we estimate.