Charge spare battery
My wife and I both use CPAP machines. When we are at electric sites, no problem. When we do an overnight without hookups, it becomes a problem. The CPAP batteries run over $200 each, so over $400 for ...
Forum Discussion
ktmrfs wrote:
how much more efficient I don't know. but the std resmed 120V to 24F DC brick based on spec's is not overly efficient.
my experience is that using a efficient PSW inverter 150W or so max input instead of 12-24VDC bps brick I got 2 days with the inverter and back vs 3 days with the dc to dc converter.
but the humidifier can be a real power hog. depends on ambient temps, humidity levels, breathing rate etc. but it can easily triple the power draw.
a better alternative if you want humidifier is to just fill the reservoir but turn off the humidifier function. start with warm water and you will have a pass through humidifier function.
often works quite well.
It sounds like, from you experience, perhaps a 1/3 improvement in efficiency. It might be worth the cost of the 12 to 24 adapter. We can live without humidification for a night if needed.
Thanks again for the info.
