Thanks Jeeper. That seems logical, too bad I didn't think of it I will try it now and let you know.

Jeeper just tried it and IT WORKS!!!!!!!!!!!! Thanks you are a genius

I have been usung CPAP therapy for a little over a year and I simply can't do without it. I have suffered through a couple of nights with no power and felt absolutely miserable the next day. So for me it is quite a contrast but I never had a eureka moment. Hang in there. It will help.

I want to check out my DC12 Converter prior to a sailing trip I am taking. I can't understand if my car can be running when I plug in the converter. I will be using this with my Resmed S8 elite no humidifier. This is only a test as the boat will have 12 v outlets for my use later. Thanks for the help.