cpap and drycamping

Most of the newer models are capable of operating on 12v. May not have come with the cord, but $25 gets you started. I know that both Respironics and Resmed both have converted to 12v systems over the past 5 years. I installed a 12v plug directly from the bedside to the battery bank and my Respironics PR-1 Auto, runs strictly on 12v now, including the humidifier on setting #2.

Mine operates on 12V and came with a 12V cord/cigarette lighter plug and also came with a regular plug that steps 120 down to 12V. Covers all the bases.

Do an online search. There are dozens of CPAP machines that will run off internal battery power. May not be cheap, nor covered by your insurance, but it is an option.

*edit*

Sorry, thought the title of this thread said something else.

As well, see if you can go without the humidifier. The humidifier makes it use 3-times the amps/hour as without.

Your RV probably has a battery, use it. Might need a small inverter but many CPAPs can operate from battery.

One of the couples I know has, using a fully charged G24 deep-cycle ran their two CPAPS three nights, without charging (and no other loads). They used a good quality true sinewave inverter, well matched to the load