There is no definitive answer to this question as it depends on the individual pigeon and where the solar panel is located. Some pigeons may sleep beneath solar panels if they provide a warm, dry and safe place to roost, while others may avoid them altogether. It is important to remember that pigeons are wild animals and therefore their behaviour can be unpredictable. If you have Solar Panels installed on your property and notice pigeons roosting underneath them, it is best to contact a professional for advice on how to safely remove them.