Our IKSS did not come with the Zamp solar option, but I have heard only the Zamp panels will work. (I'm not sure why, but I would imagine you could figure some mod to make it work with other panels). I have set up my own semi-portable system, where I put my two panels on the roof, run through a Renolgy charge controller, a monitor, and to the battery. Has worked great so far, and it allows me to move my panels if the roof is shaded.
Lablover--- the max amperage of the panels determines what charge controller you need. The number (and type) of batteries depends on what your energy requirements are. Not sure how much electricity your CPAP requires, but you should be able to determine how much it would take to run the CPAP for 8 hrs and determine what size battery bank you need. Remember, in almost all cases, solar is only used as a battery charger, so if you have enough power in your batteries to run a device for 8 hrs one night and it is cloudy the next day, you will be out of luck the next night.
Old- 2002 21 Roo
New- 2015 Shamrock 23 IKSS
TV- 2010 Nissan Titan CC