01-13-2016, 05:35 AM
Keeping the refrigerator full with water bottles does not help with efficiency. Neither does turning the refrigerator off at night or otherwise putting it on a timer. If the refrigerator is X degrees inside and the room is Y degrees outside and the refrigerator has Z insulation and thermal efficiency then that is what determines energy use. Adding water ballast will cost you energy to cool it down but afterwards will make no difference otherwise. Turning the reefer off overnight will only save you energy by letting your stuff get warm. If you are OK with that then just turn the controls to a warmer setting and save energy all day long. As a bonus you will likely get exercise running back and forth to the toilet.