DATA-CERTIFIED · NO SPONSORS · SPECS ONLY · UPDATED MONTHLY
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We track 12 power stations and score each one 0-10 on official specs. For CPAP duty the deciding question is how many nights a charge lasts, so this page adds that arithmetic to every model: usable capacity is rated Wh x 0.85, the planning draw is 40 W with the heated humidifier off and 80 W with it on, and a night is 8 hours. These are planning figures, not measurements of your machine.
Affiliate disclosure: this guide contains links to Amazon. If you buy through them we may earn a commission at no extra cost to you. Rankings here are computed from official specs and owner-review counts — commissions never enter the formula.
The shortlist
Three units for three situations. The full table, with the math, is below.
EcoFlow
The highest-scoring 1 kWh unit we track: 1,024 Wh works out to 2.7 nights with the humidifier off, and 27.6 lbs is still a one-person carry to the bedside.
Tip: add it to your Amazon cart while you decide — it stays saved there, with no obligation to buy.
EcoFlow
10.9 nights humidifier off from 4,096 Wh, the top score of all 12 stations we track. It is also 113.5 lbs, so it stays at home.
Tip: add it to your Amazon cart while you decide — it stays saved there, with no obligation to buy.
Jackery
1,070 Wh at 23.8 lbs: 2.8 nights humidifier off, the lightest 1 kWh-class unit on our table.
Tip: add it to your Amazon cart while you decide — it stays saved there, with no obligation to buy.
Bought from the merchant, backed by their warranty and returns — details in our Disclaimer →
All 12 models
One card per model — official image, 0–10 data score, key specs. Cards are sorted by score; flip the order with the control below.
Bought from the merchant, backed by their warranty and returns — details in our Disclaimer →
7.8/10
6.2/10
6.0/10
Jackery
4.7/10
4.5/10
Jackery
3.7/10
3.6/10
3.5/10
Jackery
2.7/10
1.7/10
Bluetti
1.5/10
1.5/10
The math
*Usable capacity is rated Wh x 0.85, the same planning figure our outage and CPAP camping guides publish. Nights = usable Wh / (draw x 8 h). With the heated humidifier off we plan at 40 W; with the humidifier and heated hose on, 80 W. The humidifier roughly doubles the nightly draw.
Machines differ. ResMed, Philips, and Breas units draw differently, and pressure settings move the number. Check your power brick's rating and redo the arithmetic before relying on any figure here.
Honest limits
We do not track fan noise or UPS switchover times, and both matter at a bedside. If silent running or zero-gap cutover is a requirement, confirm that spec on the manufacturer's own page before buying.
A unit under 1 kWh covers less than one humidifier-off night in this math. Small units are travel gear, not backup power for sleep therapy.
FAQ
The data
Sorted by the existing site score (0-10, official specs across all 12 tracked stations). Missing specs show as — and are excluded from that model's score with the remaining weights rescaled. Full formula on the methodology page ↗
| Product | Score | Capacity | Nights, humidifier off* | Nights, humidifier on* | Weight | |
|---|---|---|---|---|---|---|
|
|
7.8 | 4,096 Wh | 10.9 | 5.4 | 113.5 lbs | Amazon ↗ |
|
|
6.2 | 3,840 Wh | 10.2 | 5.1 | 132 lbs | Amazon ↗ |
|
|
6.0 | 2,042.8 Wh | 5.4 | 2.7 | 61.5 lbs | Amazon ↗ |
|
|
4.7 | 1,024 Wh | 2.7 | 1.4 | 27.6 lbs | Amazon ↗ |
|
|
4.5 | 1,070 Wh | 2.8 | 1.4 | 23.8 lbs | Amazon ↗ |
|
|
3.7 | 1,152 Wh | 3.1 | 1.5 | 35.27 lbs | Amazon ↗ BLUETTI ↗ |
|
|
3.6 | 2,048 Wh | 5.4 | 2.7 | 61.6 lbs | Amazon ↗ BLUETTI ↗ |
|
|
3.5 | 288 Wh | 0.8 | 0.4 | 8.27 lbs | Amazon ↗ |
|
|
2.7 | 1,056 Wh | 2.8 | 1.4 | 28.44 lbs | Amazon ↗ |
| 1.7 | 288 Wh | 0.8 | 0.4 | 9.48 lbs | Amazon ↗ BLUETTI ↗ |
|
|
|
1.5 | 288 Wh | 0.8 | 0.4 | 9.1 lbs | Amazon ↗ |
|
|
1.5 | 245 Wh | 0.7 | 0.3 | 7.8 lbs | Amazon ↗ |
Source: official manufacturer specifications and Amazon owner-rating counts, collected 2026-09-15. No prices, no sponsored placements — ever. Bought from the merchant, backed by their warranty and returns.
Tip: add any contender to your Amazon cart while you compare — it stays saved there, with no obligation to buy.
Keep reading
All 12 power stations, compared → · CPAP camping guide → · Outage runtime math → · Best for home backup → · Best for camping → · How we score →