i doubt it is the well pump. We had a ten hp three stage pump at our last home. I watered the yard with it and washed cars and RVs.
One heat pump, one four ton heat pump.
We first moved there electric was like thirty dollars a month summer, and 50 dollar during winter.
Before we moved the bill was about 100.00 summer and two hundred to two hundred twenty winter and some real cold winters.
here with two total 17 ton heat pumps and all the lights it has been a bit over five hundred during last winter.
Summer it is around two hundred twenty, I think. Water is piped in now.
That's on 4800 heated sq ft.
The guessed at the bill when they drove by and saw the RV?
They used to estimate ours and some times it was a doozie.
We got in the habit of reading the meter ,after they came, or when they should have come by.
We had our RVs beside the house on concrete and sometime filled ready to go so heat was on. Electric unless it was going to be real cold and then the furnaces, all set at about 60 degrees though.
It seems to be something is wrong, on not being able to examine the evidence.
Check the meter reading and compare it with the last months reading.
If they are within reason then look for something else.