I had to purchase 180 kwh last month as I had used up all my surplus KWH. I had massive usage around the holidays as I had a ton of family staying over. The record cold snap in late Dec and Jan was another reason. I also had the panels installed in May so missed some surplus production last spring. The good news is my net meter is now showing a surplus as production has started to skyrocket on sunny days this time of the year. I can't really complain about a $46.49 bill as these panels have been saving me a fortune. Eversource is charging .26 kwh here in CT. We have the highest rates in the US. $46.49/180kwh = .26 cents a kwh. On a good production day I can produce about $10 a day in power at those rates with my small 5.4kwh system.