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NOTE that below is using the figures you provided above, earlier you indicated "the CPAP draws 0.81 amps at 120 VAC" which equated to 71 Amp Hours over eight hours THOSE TWO FIGURES ARE QUITE A BIT DIFFERENT ??? I cant say from here how often or how long the tank heat and humidity function draws energy, perhaps that could explain the big number difference from your two posts ???? 1) 0.18 KWH/1000 = 180 Watt Hours 2) Using 12 battery volts, 180/12 = 15 Amp Hours of energy drawn from your battery bank (Battery full charge is 12.6 but as it discharges voltage drops) 3) Using two CPAP's and assume they draw near the same energy that's 30 Amp Hours but the Inverter is NOT 100% efficient so if it were say 85% efficient that 30 Amp Hours equals 34.5, at 90% efficient it equals 33 Amp Hours drawn out of your battery bank 4) Since if using AGM or Flooded Lead Acid you don't want to draw down over 50%, you need to start the CPAP's with at least 70 rated  Amp Hours of energy storage and to be on the safe side Id prefer at least 100 when the CPAP's start 5) You spoke above using a pair of deep cycle 6 volt batteries. If so and if they were similar to Trojan T-105 that series combination would give you 225 Amp Hours (112.5 USEABLE) at 12 volts so ifffffffffff you actually used 34.5 Amp hours total per night, you can get around three nights of use. Of course lesser Amp Hour batteries would give you less   6) INVERTER The brick converters you posted were rated at 90 watts but lets use say 200 Watts total for two CPAP's so to be safe and allow for expansion Id suggest say a 400 Watt or larger AND I HIGHLY RECCOMEND A PURE SINE WAVE INVERTER. Some equipment has problems with MSW (cheaper to buy) but most ALL equipment does fine on PSW 7) SOLAR  You mentioned a 100 Watt Panel. Ifffffff it is exposed to good bright sunlight at a direct angle (ideal best condition but NOT typical) using say 13.6 charging volts, that would equal around  7 battery charging amps and over lets use 4 hours that's 28 Amp Hours of energy (42 Amp Hours over 6 good sun hours) which is close to that 30 Amp Hours you use up each night   NOTE this is ONLY an approximation NOT exact or typically practical. Unless the sun was bright direct angle to the panels I more often saw 5+ never 7 the theoretical and on many days I didn't see 6 good hours of sun...…….. Hope this helps, you have asked good questions and we have tried to help the best we can based on the info?? you provided John T   Longgggggggggg retired n rusty Electrical Engineer and NOT any Solar expert so nooooooooo warranty lol Post back any follow up questions and we will be glad to help

Thanks again! I read the Yelp reviews and it is 3.5 stars and I do see some negatives reviews. Not sure if it's all their fault, but definitely I need to be aware.  I wonder if renting a Lexor for only 2-3 days would be long enough as a trial? I'm considering that route as well. Renting one in Florida or on the Gulf Coast would be great but I'm willing to go anywhere as long as it's not too cold. There is one Lexor for sale in Florida that looked/sounded good online, so it would be convenient if I can find a rental in Florida.

We travel the back roads, dirt and sometimes mild 4x4 roads.  I like and buy Benchmark atlases.  However nothing beats looking at the satellite view of the roads with Google Earth, or the satellite views on Google Maps and/or Bing Maps.  I usually start with Benchmark and/or NF maps and then go to the online views.   Sometimes I am amazed to find ground level 360 degree photos of the dirt/gravel roads.  I know of no way to know if there is a 360* view unless I click on the icon to see if there is a photo.   We also, at times, take our RV back to boondock spots on the dirt roads, but not before we drive the toad to check out the access.   

My dad has had both knees and a hip done now the oxycodone made him see wall colors that were not there and set of his his anxiety. As I recall he couldn't sleep. And of course there's the wonderful constipation.  So far so good for me but I am already taking the minimum dose they recommended.  I promise not to bore all of you with my progress!

Eternabond tape has a variety of tapes which MAY adhere to your plastic however I don't know for sure if any of them will work with your plastic.   Go to Amazon.com and search for "eternabond tape" to see a selection of their tapes.  The problem is, lots and lots of adhesives adheres to aluminum.  However "plastic" is a different animal.  There is a lot of plastic which needs a very specific adhesive for the specific plastic.  This makes it very difficult to give a quick answer as to which adhesive you need.  It just depends on the plastic.  What makes this even more difficult is unless one of us has experience with the specific plastic you are using it may be difficult to provide an informed answer.