Typical wattage range
60-100 W. Use a measured average when the device matters.
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Medical comfort
CPAP with heated humidifier Runtime Estimate
This is a comfort-focused estimate, not medical advice. Use the CPAP manufacturer's battery guidance for critical planning.
Planning default
85 W at 100% duty cycle, or about 85 W average load.
Confidence label
Estimated. Treat the result as a planning estimate, not a lab measurement.
1,024 Wh example
With 85% efficiency and a 10% reserve, about 783 Wh remains usable. At the default load, that is roughly 9h 13m.
Evidence behind these load values
The value class and conditions stay separate from the number. Missing source details remain unknown rather than becoming assumptions.
Device measurement guide
Use the measured average
Enter a steady watt reading or a full-cycle average in the runtime calculator. Use 100% duty cycle for an average that already includes on and off periods.
- Device wattage (W)
- Read watts after a steady load settles; record energy over time for a cycling load.
- Duty cycle (%)
- Average watts calculated from Wh divided by hours already include off-cycle time, so do not apply duty cycle again.
Use this load in the runtime calculator
Verify your watts
- Check the device label for running watts or input amps and volts.
- Use a plug-in watt meter for AC loads when the result matters.
- For cycling loads, measure long enough to capture on/off behavior.
Check output path
- AC inverter loads usually lose more energy than direct DC loads.
- Keep reserve for cold weather, battery age, and load changes.
- Do not treat label capacity as fully usable watt-hours.
Medical-device planning
- Use this site as a planning estimate, not medical advice.
- Follow the device manufacturer's battery guidance.
- Test the full setup before relying on it overnight.
How to use this scenario
- Start with 85 W if you do not have a watt-meter reading yet.
- CPAP with heated humidifier is treated as a continuous load, so runtime is sensitive to the real wattage you enter.
- Keep at least a planning reserve because battery age, temperature, output path, and device settings can move the result.
Watch-outs
- The scenario wattage is an estimate. Measure the real load before relying on it for outage, travel, or critical planning.
- For CPAP or other medical-comfort planning, use the device manufacturer's battery guidance for critical backup decisions.
Sources
- Manufacturer CPAP battery product page (official) - Manufacturer page documents a PAP battery pack for continuing therapy away from regular power; runtime still depends on the device setup.
- CPAP wattage range guide (editorial) - CPAP-focused medical equipment guide gives generic planning ranges for standard CPAP, humidifier, and heated-tube use.
Use this load in the runtime calculatorCheck source wattage rangesFind a practical power station sizeCompare runtime by battery capacity
Related Scenarios
Compare nearby loads before assuming one wattage profile covers your setup.
CPAP without heated humidifier
30-60 W, default 40 W, confidence: Estimated.
Travel CPAP
5-20 W, default 12 W, confidence: Estimated.