Also, do any of the usual line filters show any improvement?
Your solar installer should be in on this issue as well.
LG Magic remote (Bluetooth) only works intermittently between 7am and 7pm when rooftop solar panels are producing DC power, and it’s completely hopeless on overcast days. Remote works fine if I turn the solar off and after sunset. My question is How to shield the tv from the interference produced by the solar panels?