How Long Will a Bluetti PS72 Actually Run a CPAP?

Here’s the thing: some retailers list a “Bluetti PS72” even though Bluetti’s own site often uses different names. In the real world, PS72 usually points to a mid-size pack in the ~700Wh class (think EB70S at 716Wh). I’ll use that as the baseline, and I’ll also show you a smaller “~268Wh” scenario so your bluetti-ps72-cpap-runtime expectation lands in the right ballpark either way.

The quick answer

If your PS72 is the ~716Wh class and you run a CPAP without the heated humidifier, you’re typically looking at 30–50+ hours (so 3—6+ nights at 8 hours). Turn the humidifier on and it’s more like 7—10 hours—about one night, maybe a little extra. If you actually have a smaller ~268Wh version sold under the same umbrella, expect ~12—16 hours without humidifier or ~3’4 hours with it. That’s the honest bluetti-ps72-cpap-runtime snapshot most folks want up front.

What actually determines CPAP runtime?

Two big levers: your CPAP’s watt draw and whether you’re using AC or DC. Humidifiers are power-hungry—they turn a gentle 10–20W draw into 50–90W for many machines. Then there’s conversion loss: plugging into the AC outlets uses an inverter, which eats roughly 10–20% of your stored energy. DC (with the right 12V or dedicated cable) is more efficient. Pressure settings, ramp features, and leaks all nudge wattage too. So your bluetti-ps72-cpap-runtime isn’t fixed; it’s a moving target shaped by settings and cables.

Do the quick math for your setup

Grab your CPAP’s typical watts (check the app, display, or manual). Estimate usable watt-hours: for AC use, take battery Wh × 0.85; for DC use, battery Wh × 0.9 to 0.95. Then divide: runtime (hours) = usable Wh ÷ CPAP watts. Example: 716Wh on AC with a 60W CPAP is ~716×0.85 ÷ 60 ≈ 10.1 hours. Same battery at 15W (no humidifier) is ~716×0.85 ÷ 15 ≈ 40.6 hours. That’s your personal bluetti-ps72-cpap-runtime, not a sales-sheet fantasy.

Real-world examples you can copy

716Wh class, AC outlet, humidifier off (15W): ~40”41 hours (about five 8-hour nights). 716Wh class, AC, humidifier on (60W): ~10 hours (roughly one night). 716Wh class, DC cable, humidifier off (15W): ~43”45 hours (a small bump from efficiency). Smaller ~268Wh class, AC, humidifier off (15W): ~15 hours (almost two nights). Smaller ~268Wh class, AC, humidifier on (60W): ~3.8 hours (a solid nap, not a full night). Your mileage will wiggle a bit with pressure and leaks, but this is a reliable bluetti-ps72-cpap-runtime range.

Want more hours? Tweak these two things

First, skip heated humidification and heated tubing when you’re on battery. That single change often doubles or triples runtime. Second, use a DC cable made for your CPAP model. Bypassing the inverter can save 10–20% of your battery. Bonus: make sure your mask seal is good and your pressure isn’t set higher than prescribed. Tiny tweaks, big bluetti-ps72-cpap-runtime gains.

Charging and solar, briefly

If you’re camping or bracing for outages, a 100—200W panel under decent sun can refill a ~716Wh pack in a day, give or take weather and panel angle. Shore power tops it up faster, of course. For emergency prep, I like a habit: run one night on battery, recharge during the day. It turns your bluetti-ps72-cpap-runtime from “one-and-done” into a repeatable routine.

Is the PS72 big enough for me?

If you sleep 8 hours, keep the humidifier off, and want two to five nights per charge, the ~716Wh class is a sweet spot. If you insist on heat and moisture through the night, it’ll still work—just plan on recharging daily or stepping up to a larger unit. If your PS72 is the smaller ~268Wh style, it’s a terrific overnight backstop without humidifier, but I wouldn’t count on multi-night stretches unless you’re charging each day. That’s the practical core of bluetti-ps72-cpap-runtime for real sleepers, not lab mannequins.

Bottom line (and my invite)

Short version: for most people, a PS72-sized Bluetti gets you a comfortable single night with humidifier, and several nights without it. If you want my hands-on take—charging quirks, noise, port layout, the whole vibe—check my full PS72 review on Consumer’s Best. I keep it friendly, I keep it honest, and I’ll help you pick the battery that actually fits your sleep, not just your spec sheet.