1
Voltage Gate
PASSDevice output type must match generator output.
120V required -> 120V available
Yes, the RIVER 3 can run a CPAP Machine
Yes - RIVER 3 has enough running and surge power for the CPAP Machine. Target ~65W running / 120W surge; the generator provides 300W / 600W.
Power Margin Analysis
300W / 600W Capacity Running 235W headroom
65W required
Surge 480W headroom
120W required
Decision Gate Waterfall
Same decision gates as the engine: voltage, running, surge. Runtime is shown as operational context.
2
Running Gate
PASSContinuous draw with safety buffer applied.
65W required -> 300W available (235W headroom)
Required 65W required
Available 300W
3
Surge Gate
PASSStartup peak with safety buffer applied.
120W required -> 600W available (480W headroom)
Required 120W required
Available 600W
4
Runtime Insight
INFORuntime context only. It does not change the electrical compatibility verdict.
Continuous estimate: 3.1h
Device profile reference: up to 8h per day.
Power bars show required versus available output for each gate.
View full compatibility reportDecision Snapshot
Quick compatibility, required headroom, and model-specific context at a glance.
⚡
300W
Running Power
🔋
245Wh
Capacity
⏱️
~3.1h
Est. Runtime
☀️
110W
Solar Input
Quick Compatibility Check
- 1 Running headroom: target 65W; generator provides 300W.
- 2 Surge headroom: target 120W; generator provides 600W.
- 3 Tip: leave headroom for startup spikes and warm conditions.
Model-Specific Results
3 of 3 models are SAFE or TIGHT. Most demanding model: ResMed AirSense 10 AutoSet (104W surge).
| Model | Running | Surge | Verdict | Runtime | Source |
|---|---|---|---|---|---|
| ResMed AirSense 11 AutoSet | 56.1W | 73.2W | Safe | ~3.1h | OEM Manual |
Show expert analysisTechnical: **Running load:** 56.1 W typical. **Surge:** 73.2 W peak. **Voltage:** 120 V AC. The machine draws continuous low power with minimal startup spike. Most portable power stations with 120V inverters and 100+ W output handle this load comfortably. Field note: Verify your power station provides stable 120V AC output and at least 75W continuous rating. Disable the heated humidifier to reduce draw by ~30% and extend runtime. Always carry a backup power source for life-critical equipment. Can I run the AirSense 11 on a 500Wh power station? Yes — at 56.1W typical, a 500Wh station (350Wh usable) provides roughly 6 hours. Disabling the humidifier drops draw to ~40W and extends runtime to a full night. | |||||
| ResMed AirSense 10 AutoSet | 53W | 104W | Safe | ~3.2h | OEM Manual |
Show expert analysisTechnical: **Running load:** 53 W typical. **Surge:** 104 W peak. **Voltage:** 120 V AC required. The AirSense 10 has a higher peak draw than the newer AirSense 11 due to its older motor design. Field note: The 104W peak is the sizing constraint. Ensure your power station can handle at least 120W continuous to cover the startup surge with margin. Use a pure sine wave inverter — modified sine wave may cause motor faults in medical devices. Can I use a portable power station rated for 100W continuous? Risky — the AirSense 10 peaks at 104W. A station rated at exactly 100W may trip on startup. Look for 150W+ continuous rating to be safe. | |||||
| Fisher & Paykel SleepStyle Auto | 39W | 76W | Safe | ~4.4h | Engineering Est. |
Show expert analysisTechnical: **Running load:** 39 W typical. **Surge:** 76 W peak. **Voltage:** 120 V AC required. The SleepStyle has an integrated power supply (no external brick) and built-in heated humidifier. The 39W figure includes the humidifier at typical settings. Field note: The SleepStyle is the most power-efficient full-size CPAP here. At 39W typical, even a compact 500Wh power station covers a full night with margin. The integrated humidifier means no separate heater to add to the load. Is the Fisher & Paykel SleepStyle easier to run off-grid than ResMed? Yes — at 39W typical vs 53-56W for ResMed models, the SleepStyle draws roughly 30% less power. An 8-hour night consumes ~312 Wh vs 424-449 Wh for ResMed. | |||||
How This Pairing Performs Across Our Database
This unit ranks #3 of 33 compatible generators for this device by buffered margin (Overkill class).
How CPAP Machine Performs Across 33 Tested Generators
33 of 33 generators are SAFE+TIGHT for CPAP Machine.
33
Safe+Tight
Safe 33 (100%)
Power Comparison: EcoFlow RIVER 3 vs Top Alternatives for CPAP Machine
EcoFlow RIVER 3 Safe Overkill
Current unit
Running 300W
Surge 600W
Fit class uses buffered needs (running and surge) for this device.
Specs & Surge Analysis
Medical
CPAP Machine
8-Hour Sleep Session
Select Your Model:
56.1W
Running
104W
Surge
120V
Required
True Surge™ Analysis
Safety Buffer: +15% Running Power Usage 22% Utilization
65W required 300W Capacity
235W headroom
Surge/Startup Peak 20% Utilization
120W required 600W Capacity
480W headroom
Voltage Match 120V ↔ 120V ✓
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Generator Insights
The 600W surge rating can handle typical startup loads from small compressor-driven appliances like mini fridges and air tools. It can support motor-driven devices that require momentary inrush current during ignition. At 245Wh total capacity, expect limited runtime on continuous loads near the 300W ceiling.
LFP chemistry provides stable operation under load cycling. The unit accommodates brief inrush events up to 600W for equipment startup. Source: EcoFlow RIVER 3 User Manual v1.0 (manufacturer documentation).
Extend Runtime with Solar
Keep your CPAP Machine running with solar • MPPT: 11– 30V • Max: 110W
Official EcoFlow
110W Panel
1 Hour Sun =
Runs Indefinitely
MC4 -> XT60i
Full in ~3.2h Adapter required: MC4 -> XT60i.
Smart Value Goal Zero
100W Panel
1 Hour Sun =
Runs Indefinitely
Goal Zero proprietary -> XT60i adapter required
Full in ~3.5h Adapter required: Goal Zero proprietary -> XT60i adapter required.
Smart Value Jackery
100W Panel
1 Hour Sun =
Runs Indefinitely
Jackery proprietary -> XT60i adapter required
Full in ~3.5h Adapter required: Jackery proprietary -> XT60i adapter required.
Technical Analysis
Spec-Based • No GuaranteesTechnical Breakdown
Running range: 39W (F&P SleepStyle) to 56.1W (ResMed AirSense 11) typical. Peak surge: 104W (ResMed AirSense 10 startup). Voltage: 120V AC. CPAP machines are low-draw medical devices — the startup surge is the sizing constraint, not the running watts.
Expected Behavior
Estimated runtime: ~3.1h. An 8-hour sleep session consumes 312-449 Wh depending on model, pressure settings, and humidifier use. Load is steady after initial pressurization with minor fluctuations during the breath cycle.
Field Note
Use a pure sine wave power station — modified sine wave inverters may cause motor faults in medical devices. Disable the heated humidifier to reduce draw by ~30% and extend runtime. Always carry a backup power source for life-critical equipment.
Frequently Asked Questions
Can the EcoFlow RIVER 3 power a CPAP Machine?
Yes. The EcoFlow RIVER 3 provides 300W running / 600W surge. The CPAP Machine needs 65W / 120W (including 15% buffer). That leaves 235W of running headroom and 480W of surge margin.
How long will the RIVER 3 run a CPAP Machine?
Approximately 3.1 hours, based on the CPAP Machine's 56W draw and the RIVER 3's 245Wh capacity (70% usable after real-world losses).
What Else Can You Run?
With 180W allocated to the CPAP Machine, the RIVER 3 still has ~4W of margin. These devices could run simultaneously:
🌬️
Nebulizer
60W
🩺
CPAP (No Humidifier)
40W
❄️
Medical Fridge
80W
Pro Tip for Medical Users: According to energy reports, turning off the humidifier on your CPAP Machine can double your runtime. Using a DC cable instead of the AC plug is also recommended to avoid inverter inefficiency.
Compare all 33 generators for the CPAP Machine
Ranked by budget, runtime, and overall compatibility.
Related Guides: How to Size a Power Station
Technical Sourcing & Verification
ID: ecoflow-river-3-cpap-machine 🏛️ Device Data Source
Engineering Est. Safety Factor Applied
Derived from variant list (max of variants). Running worst case = ResMed AirSense 11 (56.1W typical). Surge worst case = ResMed AirSense 10 (104W peak).
⚡ Generator Specs Source
OEM Verified
EcoFlow RIVER 3 User Manual (2024-09-11)
Methodology informed by US Department of Energy (DOE) & EIA references where applicable.
Our methodology →
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