I should have added how many watt hours they would use in a nights sleep off your battery but I wasn't sure how to do it..
Assuming you have a 100ah battery which is 1200 watt hours,this is what you would use running the C-Pap with the humidifier..(If I did it right LOL)
81 watts off the inverter for 8 hrs = 648 watt hours.
81 watts off the Inverter for 6 hrs = 486 watt hours.
64 watts off 12 volts for 8 hours = 512 watt hours
64 watts off 12 volts for 6 hours = 384 watt hours
So if these numbers are correct,you could run your C-Pap with the humidifier, off an inverter for atleast one night for 6 hours and be above the 50% of the lead/acid battery.Using 12 volts easily for one night off of a lead/acid and more if you have a lithium battery for both ways.
