I have a circuit breaker between the controller and batteries, also between the batteries and inverter. i just have the disconnect between panels and controller, by my calculations I don't need fuses/CB there unless I had 4 panels. I have a catastrophic terminal mount fuse on the battery connection itself. I used Blue Sea stuff all around.
Battery bank is nothing special, just two grp 27 batteries, they are the largest that will fit in my battery box unless I mount them in the truck. At this point these batteries provide us with enough capacity.
The inverter does have a fan and a remote switch, we pull about 85amps when making coffee so the fan does run then but I think the coffee maker is still louder.