For a CPAP user, a power outage isn't an inconvenience — it's a medical event with a countdown. The machine that keeps airway pressure on through the night can't "hold on" the way a fridge can, and the backup has to do three things almost no other load demands: run all night, sit in the bedroom, and stay silent next to a sleeping partner.

This guide sizes a portable power station for CPAP use at home and on the road — with the real per-night math, the one feature to insist on, the safety questions answered, and the exact spec checklist that separates a good CPAP station from a mismatch.

TL;DR:

● A CPAP draws 20–60W(typically 30–45W) — a full night is~240–480 Wh，1,000 Wh is the right default: ~2–3 nights of CPAP-only, or ~20 h of CPAP + lights + phone; 500 Wh covers a single night (the minimum);2,000 Wh is the multi-night / add-a-fridge tier

● Insist on:LiFePO4 + UL 2202 + a low-load/CPAP mode + near-silent fan + 12V or USB output— the checklist is below

● Feeding the CPAP over 12V DC instead of AC typically buys back 10–30% of the runtime

The Load: What a CPAP Actually Draws

CPAP power draw depends on machine and settings:

Plan on ~30–45W for a realistic number — and know that every heated feature is a watt you're paying in battery. (Some users drop the heated humidifier in summer to stretch runtime; the machine handles it fine.)

Per night (8 h): 240–480 Wh. That single number is the whole sizing problem.

The Runtime Math (per Station Size)

Using the cluster-standard formula — usable Wh ÷ CPAP watts (a station delivers ~85% of its rated Wh):

Two honest notes:

1. CPAP-only is the best case. The moment the outage also takes the night light, the phone, and the router, the 1,000 Wh number drops toward "~20 h of combined" — still 2+ nights of CPAP, because the CPAP is such a small fraction of a realistic home backup load.

2. The 12V trick. Most CPAPs can run from a 12V DC supply (the car-style adapter) instead of the AC inverter. Skipping the inverter conversion typically returns 10–30% of the runtime— on a 1,000 Wh station, that's the difference between 19 h and ~24 h of CPAP. If your machine has a DC port and the station has a 12V output, use it.

Why the Station Has to Earn Its Bedroom Spot

A CPAP backup lives in the bedroom, running while you sleep — the harshest placement for any battery device. That raises three requirements other loads never force:

●Safety, verified, not claimed. This is a LiFePO4 + UL 2202 (or ETL/CSA) requirement, not a preference. LFP chemistry is the most thermally stable mainstream option, and the certification is the third-party proof of it. Full reasoning is in our [safety guide] — but the short version: a certified LFP station on a hard surface, ventilated, is the correct bedroom device. A generator is never in the picture (CO).

●Silence at 30W load. At a CPAP's low draw, a good station's fan is off or near-off — the [decibel guide] has the numbers. A station that whirs at 40 dB next to the pillow will be unplugged by week two. This is a spec you should check before buying, not discover at 3 am.

●A display/app you can check from bed. A glanceable % (or a phone alert at a threshold) is what tells you at 2 am that night three is covered.

The One Feature to Insist On: Low-Load / CPAP Mode

Many major 2026 stations include a dedicated CPAP or low-load mode that shuts the inverter (and its idle draw) down when the load stays under ~50W — sometimes with an auto-off timer so the station powers down after you've stopped breathing on it, instead of idling all night. The idle draw of a standard inverter on a 30W load can cost a few percent of the battery per night; the mode removes it. If the model you're eyeing has it, that's a meaningful runtime difference at CPAP duty — ask for it, and confirm how the timer works before buying.

(If a station lacks the mode, the 12V DC feed above is the manual version of the same win.)

The Spec Checklist for a CPAP Station

●Capacity: 1,000 Wh minimum for multi-night home backup (500 Wh is single-night-only; 2,000 Wh if you also want the fridge)

●LiFePO4 chemistry (3,000–6,000 cycles — this is a 10-year bedroom asset, not a camp toy)

●UL 2202 / ETL / CSA certified — bedroom, unattended, overnight use demands it

●Low-load / CPAP mode or, at minimum, a 12V DC output for the car-adapter feed

●Quiet at light load — fan-off or ~30 dB at 30–50W (check a measured review, not "quiet")

●Fast recharge — 0–80% in ~2–3 h means a morning top-up covers tonight again

● App/threshold alert — a 20% warning before the night, not a dead display at 4 am

●Pure sine wave inverter (standard on quality units; your machine's auto-ramp and humidifier don't like anything else)

Home vs. Camping: Two Different Builds

Home backup (the outage case). The CPAP is usually the anchor load, not the only one. A 1,000 Wh station runs CPAP + router + night light + phones for 2–3 nights; a 2,000 Wh station adds the mini-fridge for meds/insulin and survives a week-long event with solar. Keep it in the bedroom or hallway, charged, on the [winter storage] and [storm season] plans. This is the profile where the "insurance" framing of our [per-kWh cost guide] is purest: you'll cycle it rarely, and that's fine.

Camping / overlanding (the trip case). CPAP 8 h + phone + lights + a fan ≈ 400–700 Wh per night (depending on heated tubing and fan hours). A 1,000 Wh station is two full nights plus margin; pair it with a 100–200W solar panel for trips longer than that (the [van life guide] has the solar math). The 12V feed matters more here — the van's 12V system or the station's 12V port is the efficient path, and the quiet operation is what keeps the campsite happy (our [decibel guide]).

What about a CPAP-specific battery pack? Some CPAP makers sell dedicated battery kits (commonly $300–500, good for roughly 12–48 h depending on model and settings). They're purpose-built, quiet, and simple — but single-purpose, often NMC-based, and priced per few hours. A 1,000 Wh LFP station costs about the same, runs your CPAP for multiple nights, and doubles as the fridge, lights, and laptop backup. For most users the station is the better primary; the dedicated pack is a sensible travel add-on for short trips where the station stays home.

Frequently Asked Questions

How many nights will a 1,000 Wh power station run a CPAP? About 2 nights of CPAP-only (at a typical 45W), or roughly 19–28 h; with a night light, phone, and router sharing the load, plan on ~20 h combined — still 2+ nights of therapy. The 12V DC feed extends that by 10–30%.

Is it safe to run a power station in the bedroom overnight? Yes — a LiFePO4 unit with UL 2202 (or ETL/CSA) certification is designed for indoor, unattended use. Keep it on a hard, ventilated surface away from bedding, and stop using it at any sign of swelling, heat, or odor (our [safety guide] covers the warning signs). A generator is never an option indoors.

Does a power station interfere with my CPAP's auto-ramp or humidifier? No — a quality station outputs a pure sine wave, which is what the machine expects from a wall outlet. Auto-ramp, EPR, and the heated humidifier all behave normally. (This is exactly why the inverter type on the spec sheet matters.)

Can I charge the station with solar for camping? Yes — most 2026 stations accept 100–600W of solar input. A 100–200W panel returns roughly 400–800 Wh in a good day, which is a full night of CPAP plus your other loads.

What if my CPAP is the only thing that matters during an outage? Size for it anyway with margin: a 1,000 Wh station at CPAP duty (30–45W) still leaves 50–70% of its capacity unused overnight, which is exactly what keeps the router, lights, and phone alive while you sleep. The CPAP is the anchor; the rest rides along for free.

Final Thoughts

A CPAP changes "portable power station" from a comfort product into a medical device with a 1,000 Wh price tag — and the spec sheet changes with it. The machine is small (~30–45W), and the runtime math is generous (a 1,000 Wh station buys 2+ nights), but the placement is the hardest in the category: bedroom, unattended, silent, and certified. Buy LiFePO4 with UL 2202, insist on a low-load/CPAP mode or a 12V feed, check the fan behavior at 30W before you buy, and size one tier above CPAP-only so the router and the night light ride along for free. Do that, and the outage stops being a medical event with a countdown — it becomes a night you barely notice, which is the entire point of the machine you're backing up.

[Optional CTA: The CPAP-ready NEJoye 1,000 Wh station — UL 2202, LiFePO4, 12V + 100W USB-C, fan-off at light load → NEJoye F1200]