C-Pap power usage
So, I have been using my 12v(6.6 amps) C-Pap machine for a few years in my Creek Side. Now..........my wife is using a C-Pap. So far I have had my wife use my home unit(same exact one as in the trai...
Forum Discussion
I have a resmed airsense 10 unit. Since there has been lots of discussion about power draw, on our current trip I decided to reasonably accurately measure the actual AH draw/day.
Unit: Resmed Airsense 10 powered from 12V DC via the Battery power solutions 12V-24V DC converter
Power source: Battery power solutions 250WH Lithium Ion battery pack. 250WH I estimated to be about 20AH.
I turned off the humidifier, the tube heat and the wifi
Results
3 and 1/2 nights of operation 8hrs each night before the converter determined the battery voltage was to low.
So, 28 hours of operation consumed 20Ahrs or less, not knowing how low it discharged the battery. Or figure around 6AH/day, which works out to less than 1A average current draw.
For reference, the BPS website lists the runtime for this CPAP machine as 1-2 nights on the 100WH battery pack they now sell. So my run time of 3.5 nights on a 250WH pack is very consistent with their data.
These results are also consistent with the data I had from my previous CPAP unit a Remstar unit, which would run 3 nights on the same battery pack.
Also, I've run the resmed unit with humidifier on and can barely get 1 nights use. Consistent with the BPS website which states runtime can be reduced by 60 percent or more when using the humidifier.
Conclusion: a CPAP with humidifier turned off, is a minimal current drain on a trailer battery. With humidifier turned on current draw can easily triple.
Unit: Resmed Airsense 10 powered from 12V DC via the Battery power solutions 12V-24V DC converter
Power source: Battery power solutions 250WH Lithium Ion battery pack. 250WH I estimated to be about 20AH.
I turned off the humidifier, the tube heat and the wifi
Results
3 and 1/2 nights of operation 8hrs each night before the converter determined the battery voltage was to low.
So, 28 hours of operation consumed 20Ahrs or less, not knowing how low it discharged the battery. Or figure around 6AH/day, which works out to less than 1A average current draw.
For reference, the BPS website lists the runtime for this CPAP machine as 1-2 nights on the 100WH battery pack they now sell. So my run time of 3.5 nights on a 250WH pack is very consistent with their data.
These results are also consistent with the data I had from my previous CPAP unit a Remstar unit, which would run 3 nights on the same battery pack.
Also, I've run the resmed unit with humidifier on and can barely get 1 nights use. Consistent with the BPS website which states runtime can be reduced by 60 percent or more when using the humidifier.
Conclusion: a CPAP with humidifier turned off, is a minimal current drain on a trailer battery. With humidifier turned on current draw can easily triple.
