I don't have a problem with the possums as far as possums go, it is that they drive my young dog nuts at anytime of the night ( old dog couldn't care less) and it is the noise they make when they run across the roof. And then I'm concerned about the solar panels and this brings up another potential problem with cockatoos that come in in flocks to get in the cypress trees and chew/eat off the seed nuts from them. I'm concerned that if they get bored they may decide that the solar panels might be something worth destroying. I now have the 2 owls up on the roof and moth balls tied up in 5 of the trees. See how we go tonight