Edd505 wrote:
Try this 12V for Resmed
http://www.bestcpapprice.com/ResMed-10-Series-DC-adapter-for-AirSense-10-CPAP-machines-and-AirCurve-10-VPAP-Machines_p_1286.html?gclid=CKDlkNjS79ICFVNqfgods64OGA
In the RV, the PSW works fine. On battery I cannot run my S8 direct because the polarity inside the machine is reversed (from the factory), so I use a 150 watt mini inverter to power the machine with. I plug my Li battery into the inverter and use the 110 volt power cord to run the machine plugged into the Inverter. If I had know of that short fall ahead of time, I would have a different, more 12 volt friendly machine but it is what it is. CPAP machine are very expensive to purchase outright.
I actually got away a bit cheaper than your link. My mini inverter was 45 bucks.
Res Med even warns users not to plug the S8 into a 12 volt power supply negative ground, as it will cause immediate failure of the machine. For over a grand, I don't want to find out.