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
JimK-NY wrote:
I think a few added comments might be of help for anyone who is not familiar with RV CPAP issues. First, Res Med makes CPAPs designed to run on 110 volts and also other units designed for 12 volt use. The 110 units seem to use a lot of power and for battery use they would also require an inverter which loses additional power in the form of heat. The 12 volt units comes with a transformer and can be used with 110. I found many of the providers do not understand the difference. So you might actually need to research the Resmed offerings and give the provider the appropriate part number.
CPAPs can chew through a lot of battery power. According to the OP, his 12 volt model uses 6.6 amps. For 8 hours of use, that would be 53 amp hours. Two units running for a night would deplete the 200 AH batteries to less than 50 percent. The 6.6 amp draw sounds high and is probably the maximum with the humidifier running. My wife's unit pulls about 3 amps without the humidifier. Anyway, CPAPs pull a lot of power and if you are going to run a CPAP solely on battery power, you will need a substantial battery bank and you will need to run a generator or have a suitable solar system and plenty of sunlight.
There are some new travel units that require minimal power, but you would need to go back to your sleep doctor to discuss the suitability.
I am thinking that the Amp draw on the labels that I posted are with the Humidifier in use. Since running two machines(my trailer unit and my house unit) w/o humidifiers on drops me to say 12.4 volts. 12.6 volts is 100% charge right?
