Don't listen to the uninformed cost on these are usually no more then most new fridges. Here is a simple way to see what any device cost to run. Volts x Amps = Watts Watts x Hours (total run time I.E. mine runs 5min, every hour= 2hrs per day) x Days =Total Watts. Now divide that by 1000 will give you Kw. So my kezzer cost per year approx. 115volts x 5amps =575watts x 2 hours =1150 x 365 days per year = 419750 / 1000 = 419.75kw I Pay .08 cents per Kw. 419.75 x .08 = $33.58 per year or $2.80 a month. SORRY FOR THE LONG WINDED RANT JUST HATE IT WE IF IT'S OLDER IT'S NOT EFFICIENT!