The trend is towards residential fridges in all the larger RV's and it will continue to be that way
You will have to really search to find a mid to larger class A that has propane fridge now days, that trend is also following in the larger TT's and 5th wheels
Smaller RV's without decent battery banks and inverters will still continue to see the small dual powered fridges for a long time until the electrical efficiency such as the article posted, increased even further
Anything that uses less power and still performs such as the LED lighting has to be a good thing as long as it is affordable
We use multiple sources of energy for heating in the winter and I use an excel spreadsheet to input the BTU's and cost per unit to determine what our mix will be
The spread sheet also calculates the energy loss or efficiency of each fuel. Heat pumps are the most difficult as the numbers change with ambient temps
Most of the energy used in RV's and homes is for heating and cooling so other than serious boondocking there is no reason to pay a higher price for a fridge at this point in time.
The energy usage side has driven the RV's with multiple HVAC's towards heat pumps as well
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