Since the solar panels and its wiring are DC - I suspect the concern would be the inverter, which produces the AC, matching the utility grid frequency that the various household appliances, like hair dryers, vacuum cleaners, microwaves, PCs/laptops,… expect.
Someone with a residential (supplementary) solar system might be willing to shut down their system during your stay, even if it means that during daytime they’ll be paying the utility a little extra (for their AC power).