C-Pap power usage

ktmrfs wrote:

Vintage465 wrote:

SidecarFlip wrote:
Interesting reading. I use an S8 in my TC, running 2 Trojan 6 volt batteries and an AIMS power remote switching PSW 1500 watt and after 8 hours continuous use my SeeLevel battery monitor still shows 80 percent capacity in my batteries in the morning.

I use a passive (air over) humidifier, not as heated one.Hard to find but worth the trouble.

I also use the S8 on hunting trips running off a Lithium Ion battery pack and a MSW 500 watt inverter (passive again) and 2 Li packs run the machine for 3 8 hour nights and charging is a cigarette lighter plug away.

I have no issues in the TC or in a tent.

I am running two cpap machines. That is why I may be using more. But with two machines, if I only tug it down to 75-80% of capacity, my solar always packs me back up by noonish.

even with two machines, not using humidifier, it sound like a higher than expected draw. my one machine, the airsense 10 draws at most 8AH/night, actually closer to 5AH. so even at 10AH/night each, that's 20AH total, or not quite 10 percent on a pair of golf carts. you should be staying above 90 percent if that's all that is drawing current. I suspect things like your fridge, CO detector, propane detector, stereo even in off is really standby, are all drawing as much or more than a CPAP machine.

and trying to determine battery SOC by only looking at battery resting voltage is difficult.