What size generator for cpap machine?
Check, uncheck or adjust the typical device list below — watts, startup surge and battery size update instantly. Numbers come from U.S. DOE, ENERGY STAR and manufacturer spec sheets, not marketing copy.
1. Check what you need to power
Refrigeration & Freezers
Kitchen
Heating, Cooling & Fans
Water & Pumps
Laundry & Cleaning
Electronics & Office
Medical Devices
- 1
Power Tools & Outdoor
Lighting
- 1
2. Your sizing
3. Best cross-brand matches
- Bluetti AC70~$359
- surge 1,500W covers your 96W start peak
- 1.3 days of your typical daily use (768Wh / 573Wh)
- Goal Zero Yeti 1000 Core~$900
- surge 2,400W covers your 96W start peak
- 1.7 days of your typical daily use (983Wh / 573Wh)
- EcoFlow DELTA 3~$599
- surge 3,600W covers your 96W start peak
- 1.8 days of your typical daily use (1,024Wh / 573Wh)
Static answer (crawlable summary)
Typical device list: CPAP Machine (ResMed AirSense 11, with humidifier)×1, Phone / Smartphone Charger×1, LED Bulb (60W equivalent)×1.
| Continuous load | 79 W |
|---|---|
| Startup peak | 96 W (driven by 1× CPAP Machine (ResMed AirSense 11, with humidifier)) |
| Daily energy use | 573 Wh |
| Recommended capacity | 720 Wh (25% margin included) |
| Minimum inverter | 90 W continuous |
Frequently asked questions
What size generator for cpap machine?
For a typical setup (cpap machine (resmed airsense 11, with humidifier), phone / smartphone charger and led bulb (60w equivalent)), you need at least 79W of continuous power. The single biggest moment is startup: when 1× cpap machine (resmed airsense 11, with humidifier) kicks on, the momentary draw peaks at 96W. For overnight runtime we recommend at least 720Wh of battery capacity (your devices use about 573Wh per day, plus a 25% margin).
Which power stations can handle this?
Based on published specs, Bluetti AC70, Goal Zero Yeti 1000 Core, EcoFlow DELTA 3 all cover the 96W startup peak and give you 1.3 days / 1.7 days / 1.8 days of typical daily use. Check the comparison cards above for the full numbers.
Why is the startup surge higher than the running watts?
Motor-driven devices (fridge compressors, well pumps, air conditioners) draw 2-5× their running power for a split second at startup — measured as locked-rotor amps (LRA). A generator that only meets the running load will trip or stall when the biggest motor starts. Our data sources: U.S. DOE Energy Saver, ENERGY STAR certified product database, and manufacturer spec sheets (Franklin Electric, Goodman, Zoeller).