Newbie in NC Minnesota

[Harryset]

Any advice on this wiring layout?
4ga wire
50amp breaker
150 amp fuse
Black/red at bottom right go to 2 12v batteries in series for 24v
PV wires straight into charge controller

Any additional fusing/protection recommendations? Are fuse and breaker in right spots? Seems to me that one of them should be on the array + wire.
View attachment 109267

Thanks!!

Nice, clean setup so far. I am also in UP NORTH Minnesota (Paul Bunyan country). Just started my small system this summer for keeping snow blower battery on trickle during the cold temps.