How was your issue detected?:
Starting in August of 2020 I noticed intermittent lights flickering which were observed more frequently over time. Electric utility replaced meter, checked connections and declared the issue to be on my side. Flickering continued. Had three electricians evaluate my system and panels (1 main panel, 2 sub panels). No obvious signs but some discoloration in the main panel was seen and suggested main panel replacement which was completed in October 2020. The sub panels were not replaced. After main panel replacement flickering continued. Utility installed a monitoring device at meter and monitored for a few weeks and found no issues. Over the winter months flickering subsided almost completely. Starting in late March 2021 flickering returned. Installed the Sense device and commenced Power Quality labs monitoring and a typical day has been as shown in the attached images. Flickering has been on the increase. Utility came out and replaced service line from hand hole to meter in case of damage. No change. Neighbors are not reporting flickering in their homes. Although there are many homes on my street I am told that only my house and one other are fed off the line from the transformer and that house is not reporting flickering.
Did you noticed any other signs of this issue around your home?:
Not all lights/plugs in the house are affected when dips occur. When looking at the affected breakers it is consistent with only 1 of the 2 legs being affected which the Sense graphs confirmed.
Looking for ideas. Utility is going to return for further data recording at the meter and checking of their line from the transformer.
Screenshots from Sense Lab