The 20A you see is the max amps the solar charge controller can handle, but it''s not what it outputs if it''s only connected to a 100W 12V panel. The same would be true if it was connected to a 50A solar charge controller. A 12V 100W panel will output about 6A and not blow a 10A fuse, and that''s all that matters with the Furrion port. Reply