glass type solar PV panels, including DualSun are meant to be designed to AS 2712-2007 standard but this standard only provides protection against hail stone impacts up to 35mm (golf ball size), larger ones may destroy the panels in the same way they destroy car windscreens
1), and your house insurance may or may not have protection against such damage - and if you do declare you have a solar panel system your premium may be increased to allow for such damage.