Most panels are designed to withstand most ordinary hail. Modern panels rarely use glass.
For such large hail, one option might be to pole-mount the panels, then tilt them up to full vertical when serious hail is predicted (takes about 5 minutes, 2 people and a wrench). This will put the faces out of harms way. You could add some kind of a rail at the top end of the array to protect the top edges from damage.
Of course, if you're getting that kind of hail, you're probably also under a tornado watch or warning.
Be sure to talk to your insurance company, no matter what you do. It is NOT the case that solar panels (or any other major addition) are automatically covered - since they add value to your home. Your insurer will need to increase the value in the policy. In addition, the type of installation makes a difference in whether or not they're considered part of the dwelling or need a separate rider attached to the policy. We just did this, so it's fresh in my mind - part of our system is included in the dwelling portion of the policy, and part is a separate rider.