18h 2m
Estimated runtime for cpap without heated humidifier.
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Goal Zero Yeti 1000 LiFePO4 CPAP Runtime Estimate
A LiFePO4 Goal Zero CPAP runtime check with conservative reserve. The estimate uses the same runtime engine as the main calculator and keeps source confidence visible.
meets this planning target
8-hour planning target.
AC inverter
Output path with 2000 W tracked output limit.
This estimate assumes 40 W running draw, 100% duty cycle, 85% efficiency, and 15% reserve.
Runtime Range
Use the range to plan around temperature, battery condition, and measurement uncertainty.
Conservative11h 12m
Estimated18h 2m
Optimistic22h 28m
Assumptions
These are calculation inputs, not lab-tested runtime claims.
- 998 Wh nominal battery capacity
- AC inverter output path
- 85% conversion efficiency
- 15% reserve kept unused
- 40 W average load from 1 load
- 100% battery health
- 0% temperature loss
- Fixed station overhead unknown; not included
- This is an estimate. Real runtime changes with load, temperature, battery age, AC/DC output, and device behavior.
Sources
Station facts and scenario wattage notes stay separated so the estimate is easier to audit.
Station Sources
- Goal Zero Yeti 1000 LiFePO4 specifications (official)
Scenario Sources
- Manufacturer CPAP battery product page (official)
- CPAP wattage range guide (editorial)
Confidence
Station: Verified. Scenario: Estimated. Last station verification: 2026-06-24.
Runtime Sensitivity
These computed checks show how reserve, battery health, and temperature assumptions move the estimate before you trust one number.
Current assumptions
18h 2m
15% reserve, 100% battery health, 0% temperature loss.
- 721 Wh usable energy
- 40 W average load
Higher reserve
15h 55m
25% reserve, 100% battery health, 0% temperature loss.
- 636 Wh usable energy
- 40 W average load
Cold or aged battery
13h 48m
15% reserve, 90% battery health, 15% temperature loss.
- 552 Wh usable energy
- 40 W average load
Nearby station estimates
Compare this result with nearby source-linked model pages for the same device scenario.
Goal Zero Yeti 1000X
17h 45m estimate with 15% reserve and 40 W default load.
EcoFlow DELTA 2
18h 30m estimate with 15% reserve and 40 W default load.
EcoFlow DELTA 3 Classic
18h 30m estimate with 15% reserve and 40 W default load.
Next Steps
The estimate above is this page's answer for the stated assumptions. Use these links to review the sources or rework the inputs.
Review the model
Review the scenario
Adjust the assumptions
Interactive tool for changing wattage, reserve, or output path — not a citable answer page.
FAQ
Short answers for this model and device pair.
How long will Goal Zero Yeti 1000 LiFePO4 run cpap without heated humidifier?
Using the current assumptions, the estimate is 18h 2m. Real runtime depends on device settings, output path, temperature, battery age, and measured wattage.
Is this a guaranteed runtime?
No. It is a planning estimate from source-linked station specs and scenario wattage assumptions. Use a watt meter and manufacturer guidance for critical backup planning.