Best power station for a CPAP, by how you'll use it

A travel CPAP on a weekend away and a full-size machine through a three-day outage need very different batteries. Buy for the first and the battery quits halfway through the night in the second. Buy for the second and you’re hauling a lot of battery around for a machine that barely touches it. So we’ve picked by situation, using our runtime tables and the makers’ spec sheets.

How we picked

We looked at the twelve stations in our data and asked four things, in this order:

1. Does it get your machine through the night? This is the calculated runtime from our tables, on the 12V DC path where the machine has a DC adapter, because that path gets more hours out of the same battery. We explain why in DC adapter vs AC.
2. How much is left over? Pressure, mask leak and a dry room all change the draw, so a night that only just fits on paper may not fit on yours. More capacity is more margin.
3. Can you refill it from solar? That only matters if you’re away from an outlet for more than one night. We compare each station’s maximum solar input.
4. Does the 12V car port carry the machine? Every station in our data has the same port rating, 10 A, and every CPAP figure we have fits under it. So this one doesn’t separate them.

All twelve are LiFePO4, so chemistry isn’t a tiebreaker. Weight, size and fan noise aren’t in our data, and for something by your bed they matter, so check the manuals for those. The hours are calculated, not measured. Our methodology has the assumptions.

The picks

Travel machine (AirMini): EcoFlow RIVER 3 Plus

The ResMed AirMini draws so little that a small station is enough for several nights. Of the three small stations we have, the RIVER 3 Plus has the most capacity and the highest solar input (220 W), so it wins on both counts:

The Bluetti EB3A is very close behind, and either one is fine. ResMed’s figure here is for the waterless HumidX setup, so if you use something else, your draw may differ.

Full-size machine, one or two nights: Bluetti AC180

This is the most common case: an AirSense, DreamStation or similar, and a power cut or a weekend at a campsite with no hookup. The small stations are out. A ResMed AirSense 11 gets 4.5 hours from the RIVER 3 Plus, which won’t cover a typical night’s sleep.

The kilowatt-hour class is where it starts to work. Of the stations around that size, the AC180 has the biggest battery, so it gives the longest night. The two big stations are in the table for scale:

The gap inside that class is small. The Jackery Explorer 1000 v2, EcoFlow DELTA 2, EcoFlow DELTA 3 Plus and Bluetti Elite 100 V2 all cover a night with room left, so if you prefer one of them for a reason outside our data, the AC180’s lead isn’t big enough to argue with you. We compare two of them head to head in DELTA 2 vs Explorer 1000 v2 for a CPAP.

Several nights with solar to top up: Bluetti Elite 100 V2

Same battery size as the DELTA 2, but Bluetti rates its solar input at 1,000 W, against 500 W for the DELTA 2 and AC180. If you’re refilling from panels every day, a higher ceiling means more of what the panels make can go in.

The catch: you only get that if you have enough panel to feed it. The folding panels in our data are rated 200 W to 220 W each, and one of those won’t come near the Elite’s limit. With a single panel, every kilowatt-hour station is limited by the panel, not its input, and you might as well pick on capacity. Run your own panels through the solar recharge calculator before paying for input you won’t use.

Several nights without recharging: Bluetti AC200PL, or the EcoFlow DELTA Pro for longest

When there’s no outlet and no reliable sun, capacity is all that counts. The AC200PL has more battery than the other two stations in its size class, the Jackery Explorer 2000 v2 and the Bluetti Elite 200 V2, and it takes more solar than the Elite (1,200 W against 1,000 W) for when the sun does come out. From the table above, an AirSense 11 runs 37.0 hours on it.

If you need to go longer, the DELTA Pro is the biggest station we have: 58.0 hours on the same machine. For a CPAP alone that’s overkill, unless the same station is also keeping a fridge going.

We left the Jackery 2000 v2 out of this pick because we haven’t confirmed its solar input limit from its manual yet. Its capacity is in the same range as the other two.

If you have a DreamStation 2

Philips doesn’t publish a typical draw for the Philips DreamStation 2. The figure we have is the power supply rating its manual asks for when you humidify, which is a ceiling, so every DreamStation 2 number we show is a worst case. Even on that ceiling, the kilowatt-hour stations get it through a night: 13.0 hours on the AC180. On the small ones it’s 3.0 hours, and we wouldn’t plan on that being enough. Real hours should be longer than either, so the picks above hold.

If your machine has no DC adapter

The Breas Z1 and Z2 Auto user guides don’t describe a DC adapter, so those machines go on the AC outlet. They draw little, so it barely matters: the Breas Z1 runs 49.0 hours on the AC180’s inverter.

What we’d skip

The EcoFlow RIVER 3 for anything but an AirMini. It’s the smallest battery we have, and its solar input (110 W) is below what any of our folding panels can deliver, so you can’t even refill it at the panel’s full rate.

For every machine and station pair we have, see the full CPAP runtime table.