From the description:

        Solar Roof is the most durable roof available 
        and the glass itself will come with a warranty 
        for the lifetime of your house, or infinity,
        whichever comes first.

> Solar Roof is the most durable roof available and the glass itself will come with a warranty for the lifetime of your house, or infinity, whichever comes first....

... Or 30 years. You know, whichever comes first.