Yes, I read all the previous posts (well, a bazillion of them) about cpaps and boondocking. And now I'm more confused! Which is why I started another thread! Yay, just what everyone wanted. I will be off grid all summer and want to use my CPAP. The CPAP is a Phillips Respironics DreamStation. I never use the humidifier. On the bottom it says 12V~6.67A. I read that they use between 30 and 60 watts. My pup has 2 24group batteries (80 amphours each). I have a 500W inverter. I have a 2000W inverter generator but dont want to run it all night. I'll use it to recharge my batteries during the day if my solar setup (50W panel) doesn't do the job. So my question is, will the 2 24group batteries power the CPAP all night (10hrs) without depleting too much battery? Batteries shouldnt go below 80% charged, correct? I had another idea... I could buy another battery solely dedicated to the CPAP. (what's the best battery to buy for this purpose?). And I could buy a DC power cord/adapter for the CPAP. I dont really want to buy more "stuff" though if my current set-up will work. Thanks in advance!!