Battery Power for My CPAP
There are a number of solutions for short term powering of CPAP machines while off-grid camping or during power outages, with quite a range of costs. I use a ResMed Airsense 10 CPAP with humidifier an...
Forum Discussion
Bordercollie wrote:
I know I could connect the same two batteries in series, and eliminate using the converter, but the capacity would be 18 ah.
That is correct, the AH capacity would be 18AH. BUT...the current draw from a 24V source would be 1/2 of what the converter has to draw from a 12V source, so the net effect on how long the batteries would last would be the same. (The power going into the converter (I*V = I * 12V) has to be equal (technically, a bit greater, but we'll simpify here) to the power going into the CPAP (I * 24V).) Anyway, battery longevity should be the same, and possibly a smidgen greater, without the converter in play.
Good Luck as you search for options. :)
~Rick
