No fuse for panels. Get 12V breaker for this, and another 12V breaker for controller. Or, at least, skip the panel fuse and install the switch only.
Also, I am not 100% positive, but WFCO converter seems to do no harm when working together with panels. Mostly converter will be running float when controller is off. Therefore, - no Blue Sea switch for controller/converter.
Edit:
I used the term "12V" automatically. What I really meant was "DC breaker". They are usually up to 150VDC, with varying amperages.
