Thanks for the suggestion, I hadn't thought of that option. She likes the idea, so we'll try it.

I need your help. My wife's Resmed S9 with humidifier stops and restarts several times during the night when we are running off DC battery power in our travel trailer. The S9 runs fine on AC at home or in the trailer. I am using the Resmed 90W DC converter, it's plugged into the 12V cigarette lighte...