I did a bit of forum searching, but I didn't find anything similar. When I stop charging my car (P85d) off my HPWC @ 80a, the lights in my house flicker. It doesn't seem to harm anything, but unstable power isn't a good sign. I had my HPWC professionally installed by Tesla's recommended Electrician (who has done well over 100 of them), and the house is less than 10 years old with 200a service. I preheated my car earlier today as I was going to go out, then changed my mind and stopped the preheat. When I stopped it, the lights flickered. The car wasn't charging at the time, so this was just the car HVAC that did it. Is this common? Anything I can or ought to do to prevent this? Suggestions?