Reliable Battery Power for CPAP machine

Submitted: Monday, Jun 13, 2005 at 10:28
ThreadID: 23816 Views:4186 Replies:8 FollowUps:4
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Morning everyone. I have just returned from 3 fabulous weeks cruising the outback including Dalhousie and Oodnadatta track - great trip but had difficulty with power to run my CPAP machine (used for sleep apnoea). The unit _Affordable_Storage_Drawers.aspx 3 amps at 12 volts and I found that using my dual battery system was not sufficient to run the machine all night, even when we had been driving all day and the system should have been fully charged. The only other power draw on the system was an engel 40 ltr fridge and a versa light. The system used to run it ok but now it runs out of charge very quickly, (leaving me gasping for breath and unable to sleep). My question is this:

Leaving the dual battery system for the fridge and a versa light, how can I set up a solid reliable battery system to ensure I have power to run something like this for an average 8-9 hours per night? I have a camper trailer and thought of placing a battery or batteries in the toolbox connected to an anderson plug. Any suggestions from the wise people of the forum would be greatly appreciated as if I can't fix the problem it will greatly restrict our ability to travel to remote areas.
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