As with the older cars, the new Roadster has two fuse boxes. The larger main box is located in the engine bay, and a smaller secondary box is inside the cabin. The fuse names, functions and ratings are listed below. Always replace a blown fuse with one of equivalent rating. Not every car will have every fuse due to specification and equipment variations between markets. Also of note is the provision for RHT fuses, could this be an indication of an upcoming power retractable hardtop model?
UPDATE: Yes :) These fuse locations will likely protect the RF model's roof motor circuits.
Source: Electronic Owner's Manual