Well I have been using my Fridge in the house since March last Year and I have taken the Cover Off because the Cover seems to make them Sweat, I had the fridge sitting on top of my Off Road Equipment Box and water was pooling in the cover between the Bottom of the fridge and the Cover, Not only that When I took the fridge off the top of my Off Road Box, I Opened the box and some things were going Mouldy and Condensation was Dripping and had a Heavily Build Up on the inside of the lid of the Box,
Since I removed the Cover "Last Week" the Fridge has stopped Sweating, So Here's my thought about Covers after constant Use.
1) Covers are great If your fridge lives in the Back of your Truck or out in the Open in the Bush,
2) For Domestic Use indoors or in a RV/Camper then Take it Off because of Excess Sweating.
3) With the Cover Removed I have noticed that it might run a minute or Two longer But the Fridge also Stays Off a Lot Longer Too and Indoors it is staying Off for well over 3 hours at a time and using less than 238 Watts in a 24 hour period while running on AC,
4) Another thing that will reduce Run Times and give it Longer Off Times is if you put a layer of Cans of Cokes or Dr Pepper's or what ever you like in the Bottom and place your food on top of those cans because they hold their Temp well and the Cold is transferred to the Sensor below in the Base of the fridge, And it shows because I have been getting On and Off Cycles of over 4 Hours by Packing the fridge in this way,
Anyway Guys and Gals Hope that helps. ?