How long will it run? Model × appliance answers

One page per pairing, every figure calculated from manufacturer specs with the same published formula as our calculators — nothing here was bench-tested, and models that fail a start check say so instead of showing a runtime. Data as of Oct 19, 2026.

Methodology in brief: runtime = capacity (Wh) × 0.85 ÷ average load (W). Fridge pages use the fridge calculator's defaults — 150 W while the compressor runs, 40% duty cycle (60 W average), and a start check of 150 W + 2,200 W additional starting watts against the model's surge rating. CPAP pages are device-runtime math only (default 40 W, 8 hours per night, DC factor 0.92 where shown) and make no health claims. Full methodology: how we calculate.

Refrigerator — all 30 models

CPAP device runtime — the 10 models with full pages

Prefer to run your own numbers? The fridge runtime calculator, CPAP runtime calculator, and runtime calculator cover all 30 models with your own loads.

WattLong is reader-supported. Some links on this site are affiliate links: if you buy through them, we may earn a commission at no extra cost to you. See our affiliate disclosure. All results are estimates — verify with the manufacturer and a licensed electrician before relying on them.