I don't like the solar roof system, instead I think a "standard" set of panels on a roof makes more sense.

In fact the best starting point is to ensure that they are installed on all new houses, this rolls the capital cost into the low rate financing used in most home builds.

The same can be applied when a new roof is being installed, that is a large project and you can install new panels over the new roof. This allows raking to be used and proper panel alignment regardless of the pitch of the roof.