I have two main panels each 150amp breaker. House was built in 83 and lived here for 6 years no issues. About 6 months ago we had a power surge and our main ac fail (hard short) and tripped the breaker. Had the unit replaced but it seems since then we have had issues with lights diming and electronics where you can hear them surging. I decided to do some testing and when I put my volt meter on the incoming mains I get some decent flucations. With nothing on in the house the range is like 115 on one side to 125 +|- 3 or so volts. But when we turn on a microwave for example it goes to 105 and 135. Assuming that is not normal?? No obvious signs of damage in the panel and I had the power company come look at the meter but they came when I wasn’t home and told my wife everything was normal - who knows. Any advice on what to do next?