I always feel that the more electrical appliances you have, the more you will spend on electric bills. This might not be totally true for those who have many electrical appliances with only few of them running. I always went to check the units and calculated how much it dropped. I noticed that when the fridge, TV, elctrical heater and decoder were on, the units would drop significantly. I recommend for those who have more than 5 electrical appliances to try and turn off the ones not in use so as to save on electric bills.