Electric bill kwh multiplier increased from 40-80 when smart meter installed
I'm hoping someone can help with my situation. In mid July our power company (City of Laurinburg, NC) changed our meter to an Itron Centron Watt-Hour Meter and also changed the multiplier from 40 to 80. Since then our usage has doubled. For the month of August we supposedly used 6080 kwh. Our home is approximately 30 years old, we have owned it for 17 years and have always had a multiplier of 40. I was told by the City that we had been incorrectly billed all these years. That the multiplier factor should have been based on the 400/5 CT which is located inside the Meter Box. An electrician has looked at our circuit panel and told us our load does not require a 400 CT. I have also been informed by the city that the only way to correct this is to purchase a new meter box at a cost of approximately $1800.00. I cannot believe this is correct. Any help in understanding is much appreciated. Here is a link to a graph of KWH for past 4 years.
https://docs.google.com/spreadsheets...at=interactive