Power source for CPAP machines
Over the last few years I have run 3 different CPAP machines off of batteries. Without humidification, I have found that about 100Wh of battery capacity is good for a night.
If you have 12V batteries, this is about 100Wh / 12V = 8 Ah. On my 2 recent class B RVs, this is less than about 10% of usable battery capacity for one night.
So the question becomes how big is your battery bank, how do you recharge it, and how much energy do the other uses take?
In my case, I rarely stay in one place for more than one night and the combination of the alternator and the solar panels let my CPAP run overnight, let’s my fridge stay cool and runs the bit of lighting needed. And enough to make coffee in the morning.
Tell us more about your equipment and uses and we can help more.