Best Power Station for CPAP / Medical Device Backup
For CPAP / Medical Device Backup, the top pick is EcoFlow RIVER 2 Max (score 91.9/100). 1 of 20 entities in this dataset were excluded by the hard disqualifier for this use-case.
For CPAP / Medical Device Backup, the highest-weighted factor is nightly runtime margin at 35% of the total score, because the unit has to last a full night, not just a few hours. This use-case has a hard requirement: Modified sine wave documented to cause buzzing, power-supply overheating, or erratic CPAP behavior — a safety issue, not a preference. Entities that fail this are excluded outright, not just scored lower.
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Ranked Results
EcoFlow RIVER 2 Max leads with a score of 91.9/100. Anker SOLIX C300X follows at 91.1/100, a 0.8-point gap close enough that either is a reasonable pick.
EcoFlow RIVER 2 Max tops this list with 512 Wh of capacity, 500 W continuous AC (1000 W surge), 6 kg to carry, about 1 h to refill on AC. That matters here because nightly runtime margin carries the heaviest weight in this use-case, at 35% of the score.
Against the runner-up, Anker SOLIX C300X, the winner is 224 Wh more capacity, 1.9 kg heavier, $170.01 more expensive. If that trade-off runs the wrong way for your situation, the runner-up is the one to read next.
| # | Model | Score |
|---|---|---|
| 🥇 | EcoFlow RIVER 2 Max | no humidifier: 91.9/100 (12.8h) with heated humidifier: 79.3/100 (5.12h) |
| 🥈 | Anker SOLIX C300X | no humidifier: 91.1/100 (7.2h) with heated humidifier: 72.2/100 (2.88h) |
| 🥉 | Jackery Explorer 300 Plus | no humidifier: 90.5/100 (7.2h) with heated humidifier: 71.6/100 (2.88h) |
| 4 | Bluetti Elite 100 V2 | no humidifier: 89.2/100 (25.6h) with heated humidifier: 89.2/100 (10.24h) |
| 5 | EcoFlow RIVER 3 | no humidifier: 88.5/100 (6.13h) with heated humidifier: 72.4/100 (2.45h) |
| 6 | Anker SOLIX C1000 Gen 2 | no humidifier: 88.3/100 (25.6h) with heated humidifier: 88.3/100 (10.24h) |
| 7 | Bluetti AC70 | no humidifier: 87.8/100 (19.2h) with heated humidifier: 86.4/100 (7.68h) |
| 8 | Jackery Explorer 1000 v2 | no humidifier: 87.7/100 (26.75h) with heated humidifier: 87.7/100 (10.7h) |
| 9 | Bluetti Elite 200 V2 | no humidifier: 86.5/100 (51.84h) with heated humidifier: 86.5/100 (20.74h) |
| 10 | Jackery Explorer 2000 v2 | no humidifier: 86.4/100 (51.05h) with heated humidifier: 86.4/100 (20.42h) |
Excluded From This Ranking
- Anker SOLIX C300 DC — inverter_type=none fails pure-sine-wave requirement
Specs Side by Side
The same 6 units compared on the raw verified numbers rather than the weighted score. A blank cell means the figure could not be confirmed from a manufacturer page, official manual or named retailer listing.
| Spec | EcoFlow RIVER 2 Max | Anker SOLIX C300X | Jackery Explorer 300 Plus | Bluetti Elite 100 V2 | EcoFlow RIVER 3 | Anker SOLIX C1000 Gen 2 |
|---|---|---|---|---|---|---|
| Capacity | 512 Wh | 288 Wh | 288 Wh | 1024 Wh | 245 Wh | 1024 Wh |
| AC output (continuous) | 500 W | 300 W | 300 W | 1800 W | 300 W | 2000 W |
| Surge output | 1000 W | 600 W | 600 W | 2700 W | — | 3000 W |
| Weight | 6 kg | 4.08 kg | 3.75 kg | 11.48 kg | 3.54 kg | 11.29 kg |
| AC recharge (empty to full) | 1 h | 1.13 h | 2 h | 1.17 h | 1 h | 0.82 h |
| Max solar input | 220 W | 300 W | 100 W | 1000 W | 110 W | 600 W |
| Battery chemistry | LiFePO4 | LiFePO4 | LiFePO4 | LiFePO4 | LiFePO4 | LiFePO4 |
| Inverter | pure sine wave | pure sine wave | pure sine wave | pure sine wave | pure sine wave | pure sine wave |
| Warranty | 5 yr | 5 yr | 5 yr | 5 yr | 2 yr | 5 yr |
| Price at last check | $470 | $299.99 | $299 | $399 | $199 | $449 |
Prices move constantly — treat them as a range last checked on the date shown on each unit's page, not a live quote.
What This Ranking Optimises For
Every use-case on this site is scored with its own weights, so a unit that wins here can place mid-table elsewhere. These are the exact weights behind the CPAP / Medical Device Backup scores above:
| Factor | Weight | Share of score |
|---|---|---|
| Nightly runtime margin | 35% | |
| AC output headroom | 15% | |
| Portability (weight) | 15% | |
| Price per Wh | 15% | |
| Recharge speed | 10% | |
| Verified data completeness | 10% |
Closest Calls in This Ranking
These pairs land within a few points of each other on this exact use-case, which makes them the head-to-heads worth reading before you commit:
- EcoFlow DELTA 3 Max vs Anker SOLIX F2000 — 0.1 points apart here
- Jackery Explorer 2000 v2 vs Bluetti Elite 200 V2 — 0.1 points apart here
- Jackery Explorer 300 Plus vs Anker SOLIX C300X — 0.6 points apart here
- EcoFlow DELTA Pro 3 vs Renogy Lycan 5000 Power Box — 2.4 points apart here
- Explorer 300 Plus vs Explorer 1000 v2 — Best for CPAP Backup — undefined points apart here
Work Out Your Own Numbers
A ranking is a starting point, not a sizing calculation. These run the maths on your actual devices:
- Runtime calculator — how long each unit lasts on your load
- Surge watts calculator — whether a motor or compressor will trip the inverter
- Solar charge time calculator — realistic recharge time from panels
Guides for this use-case
Frequently Asked Questions
What is the best power station for CPAP / Medical Device Backup?
EcoFlow RIVER 2 Max scores highest for CPAP / Medical Device Backup at 91.9/100 in this dataset — 512 Wh, 500 W continuous, 6 kg. It is ranked first of 10 units that qualify for this use-case, scored on the published weights for this page rather than on general popularity.
How long will EcoFlow RIVER 2 Max last for CPAP / Medical Device Backup?
EcoFlow RIVER 2 Max holds 512 Wh. After inverter losses at 75% efficiency, that works out to no humidifier (30 W): about 12.8 hours, and with heated humidifier (75 W): about 5.1 hours. The target used for scoring on this page is 8 hours. The formula is capacity_wh × efficiency ÷ draw_watts — run your own devices through the runtime calculator for an exact figure.
Do you need a pure sine wave inverter for CPAP / Medical Device Backup?
Yes. Modified sine wave documented to cause buzzing, power-supply overheating, or erratic CPAP behavior — a safety issue, not a preference. Any unit that fails this is excluded from the ranking entirely rather than just scored lower. Where the specification could not be confirmed for a unit, it is treated as failing by default rather than given the benefit of the doubt.
Why are some power stations excluded from this ranking?
1 unit is excluded here: Anker SOLIX C300 DC (inverter_type=none fails pure-sine-wave requirement). Exclusion is about this use-case only — those units can still rank well on other pages of this site.
What is the lightest power station worth considering for CPAP / Medical Device Backup?
EcoFlow RIVER 3 at 3.54 kg is the lightest of the top 5 scorers here, carrying 245 Wh. For comparison, the heaviest in that group is Bluetti Elite 100 V2 at 11.48 kg. Weight is weighted into the score for this use-case, so the lightest unit is not automatically the top pick.
What is the cheapest power station that still works for CPAP / Medical Device Backup?
EcoFlow RIVER 3, at roughly $199 when last checked, is the lowest-priced unit among the top 5 scorers for this use-case and still carries 245 Wh. Prices on these units move constantly, so treat that as a range rather than a quote.
Methodology
Scored using weights: {"nightly_runtime_margin":35,"ac_output_headroom":15,"portability_weight":15,"recharge_speed":10,"price_per_wh":15,"verified_data_completeness":10}. Method version 1.0, verified 2026-09-13.