The region of the country that would have to most likely worry about hail storms significant enough to damage a solar panel are probably not likely to install solar panels.
Also Solar panel repairs have more to do with the wiring/transmission lines/electrical connections that feed to or from the panel and not with the panels themselves. Solar panels are relatively cheap, and before you repair the ones you own I would advise you to replace them with newer ones since the technology, efficiency, and the capacity are ALWAYS improving and the prices are slowly falling.
I've never heard of repairing a solar panel - and I wouldn't know what you would repair on it anyway.Repairing would probably cost the same as buying newer ones anyway. But solar panels are guaranteed typically for 25years (industry standard) - sooo yeaaa... after 25yrs, you might want to upgrade..
Come at me again bro!