Standard duty cycle of fridge compressor?
Seems normal from what I have read
Hope my math is correct:
I have a 20yr old 23.3cuft GE side-by-side refrig that runs 45% duty cycle (18min on, 22min off or 18/(18+22) = 18/40 = 45%, after refrig door has been closed for >8hrs. 

With the current rating of 11.6 amps at 110v so this is ~.547kw/hr (110v*11.6*.45)
guessing off the top of my head newer compressors &amp; fans don't use this much current so if a new ref will run at same 45% duty cycle the cost savings will be directly proportionate to the amperage reduction (i.e. 25% reduction in amps = 25% reduction in electric bill)

Note in Texas they claim we can get 8.5 cent kw/hr but for four years now and tried four different providers past 6yrs, I only get this rate the first month they sign me up at 8.5 cents then it jumps to 10 cent a Kw hour due to each power providers tricky math; their all lying A$$e$ in my book! Used car salesman tactics of first month cheaper than all the rest. Someone should file a class action against them!