My March SCE bill is $145 up from $120 in Feb. March was the first full month using the Plugin. I avg'ed 25 kwh daily vs. 18 in the previous 2 years. I charge the Plugin about 2x per day - once in the day and once at night. I'm in the middle of Tier 4 now which is 29 cents per kwh. I declined switching to TOU (discount night electricity) because I want the convenience of charging whenever I want. The TOU day rate is 50 cent kwh.