I'm not sure what they're trying to accomplish. Their "Products" link is dead, and a 18V 30W panel (and remember, that's at the correct temperature in FULL sunlight) isn't going to make a dent in battery charge even if left on all day. The car uses more then 30W continuously just to run the computers, let alone turn the wheels.
Please don't take this personally but since this is a duplicate thread as simply a housekeeping measure I'm locking this thread.
See the multiposting rule #6 (and by inference "oops" duplicate posting). Primarily targeted for a single member making multiple duplicate posts. But the reason is to keep topics organized sufficiently for the group to be able to follow and benefit.
Feel free to post any follow-ups to the other thread here: