Simple and less expensive answer to an absorbtion fridge that don't work well.. A Danfoss Secop compressor fridge. Very efficient (residential units aren't they are power hogs). A Sanfoss Secop fridge is a duty cycle fridge. That is, the compressor (which is brushless and very efficient) runs only enough to hold a set temp and it automatically reduces power use by itself.
In cool down from ambient mode a Danfoss/Secop might pull 5 amps, but once it reaches set temp, it reduces it's power drain to less than 2 amps. About what an amonia fridge pulls with auxiliary fans installed.
Plus, no special venting and they are not affected by high ambient temps. Finally both Dometic and Norcold make drop in replacement units. Basically plug and play for about 800 bucks.
