I'm pretty sure that solar panels will not affect the sound at all, I don't see the way they can do that at all. I recently installed a solar power system myself, and I don't see any changes in terms of sounds, to be honest. Also, if you're willing to get solar panels, don't forget about Inverter chargers because they are quite handy.
Solar Panel and Inverter Recent Audio Lessons Learned
I am building a new home in California with a dedicated upstairs music room. California requires 2020 new home construction be equipped with solar panels to augment conventional electric power. The solar panels will be installed on the roof and located in the area directly above the music room ceiling. I am concerned about adverse impacts (such as RFI) on sound reproduction. Does anybody have current experience on whether they have experienced negative sound impacts attributable to solar panel inverters and battery storage devices, or implementation of effective mitigation measures? [NOTE: I am a novice in the area of residential solar energy and reluctant to rely on "canned" solar provider internet sources. I am looking for real experiences from true audio and music enthusiasts.] Thanks for your assistance.