If you live in a home that predates 1960 you may have problems with the install itself. They went through five meters before they sent an installer who knew what he was doing. I also spent a considerable amount of money having my electrician come out and prove to them it was the meter not the electric inside the house. This went on for a week.
Some of the older meters have junction tabs that have to be lined up, and you can’t just knock the meter in place assuming it will work. The electricity would then arc and burn out the tabs that weren’t line up on the new meter, so I only had half the power coming into my home. Basically, the reg meter install guys, are not electricians and merely technicians... who really don’t know how to deal with older equipment.
I hope you got some rebate for the power not used. Was it BGE?
Our house was built in 1955 but it was rewired in the late 90s.