Ricky,
I am not aware that Beaver ever used a four solar panel installation, but I have had very little service contact with a 1995 Marquis. There is a good chance that the solar panel was added by a previous owner. My suggestion would be to call Ken Carpenter at BCS (Beaver Coach Sales). He was working for the Beaver factory when your coach was built, and he may know an accurate answer for your question.
Gerald