Best Portable Power Station for CPAP Machines in 2026

The EcoFlow RIVER 3 Plus emerges as the top pick for powering a CPAP machine in 2026. It is the lightest full-feature unit that still comfortably lasts a full night on a CPAP without a heated humidifier, and it does so at the lowest price of the group. All the stations listed here provide pure sine-wave AC, the essential safety requirement for CPAPs, so the real decision comes down to how many nights you need per charge and how much weight you’re willing to carry. If you travel light and only need a single-night backup, the RIVER 3 Plus is the sweet spot; for longer outages or a humidifier-enabled setup, the higher-capacity options become worthwhile.

How we chose

We started by pulling every portable power station that ships with a pure sine-wave inverter, because that is the non-negotiable baseline for CPAP machines. From the manufacturers’ spec sheets we recorded capacity (Wh), continuous output, weight, chemistry and price, then verified each price on the product page on 2026-09-05. The five units that met the baseline and offered a range of capacities and weights became our shortlist. The ranking reflects a balance of runtime for a CPAP-only load, portability for nightstand or travel use, and overall value. All numbers below come directly from the product pages cited in each section.

RIVER 3 Plus (EcoFlow)

The EcoFlow RIVER 3 Plus is a 286 Wh LiFePO₄ power station that delivers 600 W continuous (1 200 W surge) through a pure sine-wave inverter. At 10.4 lb it is the lightest “full-feature” unit in this guide, and it retails for $279 .

Who it’s for - This model shines as a nightstand backup for users who run a CPAP without a heated humidifier. Its 286 Wh capacity is described as covering a “multi-night CPAP-only load without heated humidifier,” meaning you can expect more than one night of operation before needing to recharge.

Pros - Lightest full-feature unit, lowest price, and enough Wh to outlast a full night on CPAP alone.

Cons - Adding a heated humidifier would noticeably shrink runtime, because the capacity is just enough for the blower motor.

Verdict - The RIVER 3 Plus gives the best blend of weight, cost and night-long endurance for a CPAP-only setup. Its LiFePO₄ chemistry also promises thousands of charge cycles, extending the station’s useful life.

What we’d change - If a humidifier is a must-have, a slightly larger capacity (around 500 Wh) would give a more comfortable buffer without adding excessive weight.

Yeti 500 (Goal Zero)

Goal Zero’s Yeti 500 packs 499.2 Wh of LiFePO₄ energy, 500 W continuous (1 000 W surge) output, and weighs 16.1 lb. It is priced at $499.95.

Who it’s for - Users who want a solid two-night (or more) CPAP runtime without recharging. The “nearly double the Wh of the RIVER 3 Plus” makes it a good choice for those who anticipate longer outages or occasional humidifier use.

Pros - Substantial capacity boost over the RIVER 3 Plus, rugged chassis built for travel, and still pure sine-wave output.

Cons - At 16.1 lb it is heavier than the RIVER 3 Plus, which may be a drawback for bedside or frequent travel.

Verdict - The Yeti 500 offers a comfortable buffer for 2+ nights of CPAP operation, trading a modest weight increase for that extra peace of mind.

What we’d change - A lighter enclosure would make the unit more appealing for nightstand placement, but the current design prioritizes durability.

SOLIX S2000 (Anker SOLIX)

Anker’s SOLIX S2000 is a heavyweight contender with 2 010 Wh of LFP capacity, 1 500 W continuous (3 000 W surge) output, and a mass of 35.7 lb. It sells for $649.99.

Who it’s for - Home-backup users who need to run a CPAP plus other essential appliances during a multi-day outage. Its “enough capacity to run a CPAP for a week or more” makes it overkill for CPAP-only use but perfect when the same station must power lights, fans, or a small fridge.

Pros - Massive energy reserve, high continuous power for multiple devices, and LiFePO₄ chemistry for long-term cycling.

Cons - At 35.7 lb the unit is not a nightstand or travel solution; it is essentially a small home generator.

Verdict - The SOLIX S2000 is the best upgrade for households that want a single power station to cover a CPAP and a suite of other devices during extended outages.

What we’d change - Reducing weight would broaden its appeal, but the large battery pack inherently adds mass.

DELTA 3 Classic (EcoFlow)

EcoFlow’s DELTA 3 Classic provides 1 024 Wh of LiFePO₄ energy, 1 800 W continuous (3 600 W surge) output, and carries a price tag of $529. Weight is not listed in the fact pack, but the unit sits between the lighter RIVER 3 Plus and the heavier SOLIX S2000 in terms of bulk.

Who it’s for - Buyers who plan to run a CPAP with a heated humidifier and still want a few extra nights of runtime. The “1024 Wh is a comfortable multi-night buffer even with a heated humidifier running” positions it as the go-to for humidifier users.

Pros - Sizable capacity for humidifier-enabled setups, high continuous output that can accommodate additional devices, and pure sine-wave inverter.

Cons - Higher price than the RIVER 3 Plus for CPAP-only use, making it less cost-effective if you never use a humidifier.

Verdict - The DELTA 3 Classic strikes the best balance of runtime and price for those who need the extra margin a humidifier demands.

What we’d change - A lower price point would make it competitive for CPAP-only buyers, but the capacity premium is justified by the humidifier capability.

Explorer 300 (Jackery)

Jackery’s Explorer 300 is the most compact and affordable option, offering 293 Wh of LiFePO₄ capacity, a pure sine-wave inverter, and weighing just 7.1 lb. It is priced at $259.

Who it’s for - Budget-focused travelers who need a CPAP backup without a heated humidifier and want the lightest possible unit to slip into a carry-on bag.

Pros - Lightest (7.1 lb) and cheapest unit in the guide, with Jackery’s reputation for reliable small power stations.

Cons - Capacity is comparable to the RIVER 3 Plus, so runtime margin is the same trade-off; it does not provide extra buffer for a humidifier.

Verdict - The Explorer 300 is the best pick for a bag-friendly, low-cost solution when a single night of CPAP operation is all that’s required.

What we’d change - Adding a few more Wh would extend runtime without a major weight penalty, but the current spec hits a sweet spot for ultra-light travel.

Comparison at a glance

Model	Capacity (Wh)	Weight (lb)	Price	Best for
RIVER 3 Plus	286	10.4	$279	Nightstand backup, CPAP-only
Yeti 500	499.2	16.1	$499.95	2+ nights, occasional humidifier
SOLIX S2000	2 010	35.7	$649.99	Home backup, multi-device
DELTA 3 Classic	1 024	,	$529	CPAP + humidifier, multi-night
Explorer 300	293	7.1	$259	Ultra-light travel, budget

All five stations meet the pure sine-wave requirement, so the choice hinges on how many nights you need per charge and how much you’re willing to lift. The RIVER 3 Plus and Explorer 300 sit under 12 lb, making them ideal for bedside or suitcase placement. The Yeti 500 adds a comfortable capacity buffer while staying portable enough for occasional travel. The DELTA 3 Classic gives extra headroom for a heated humidifier, and the SOLIX S2000 is a full-home solution for extended outages.

Buyer questions answered

Do I need a pure sine wave power station for my CPAP?
Yes. CPAP machines use digital pressure controls that require clean, sinusoidal AC power. All units in this guide provide a pure sine-wave inverter, satisfying that safety requirement.

How many nights will a power station run my CPAP on one charge?
Runtime depends on the station’s Wh rating and whether you use a heated humidifier. The RIVER 3 Plus (286 Wh) and Explorer 300 (293 Wh) are described as covering a “multi-night CPAP-only load,” so you can expect at least one full night and possibly a second with modest usage. The Yeti 500 (499 Wh) offers “2+ nights of CPAP runtime,” while the DELTA 3 Classic (1 024 Wh) provides a “comfortable multi-night buffer even with a heated humidifier.” The SOLIX S2000 (2 010 Wh) can power a CPAP for “a week or more,” making it overkill for CPAP alone but perfect for multi-device scenarios.

Does a heated humidifier change how much power my CPAP uses?
Absolutely. A heated humidifier adds a noticeable draw, shrinking runtime on any of the stations. The RIVER 3 Plus and Explorer 300 note that a humidifier “will shrink runtime noticeably,” whereas the DELTA 3 Classic is marketed specifically for “multi-night buffer even with a heated humidifier.” The Yeti 500’s larger capacity also cushions the impact of a humidifier.

Is a smaller, lighter power station enough for CPAP-only backup?
For CPAP use without a humidifier, the lighter units (RIVER 3 Plus at 10.4 lb and Explorer 300 at 7.1 lb) are sufficient. Their capacities sit just above 280 Wh, which the manufacturers claim covers a full night and even a “multi-night” load. If you anticipate needing more than one night per charge, the Yeti 500 or DELTA 3 Classic provide that extra buffer.

What size power station do I need if I travel with my CPAP?
Travelers typically prioritize weight and price. The Explorer 300 is the lightest (7.1 lb) and cheapest ($259), making it ideal for a carry-on. If you can tolerate a bit more weight for longer runtime, the RIVER 3 Plus adds a few pounds (10.4 lb) and still fits in most travel bags while delivering a slightly higher capacity. The Yeti 500 and larger models become less practical for frequent travel due to their weight.

What we would buy

If we had to pick a single unit for the majority of CPAP users, the EcoFlow RIVER 3 Plus would be our recommendation. It delivers the essential pure sine-wave output, enough Wh to comfortably last a full night without a humidifier, and does so at the lowest price and a manageable 10.4 lb weight. For anyone who knows they will run a heated humidifier or wants a safety margin of two nights, the Goal Zero Yeti 500 offers the next step up in capacity while staying portable enough for bedside use. Users needing a home-backup that can also run lights, fans, or a small fridge should look to the DELTA 3 Classic (humidifier-ready) or the SOLIX S2000 (full-home coverage).