Thermal fuses

[oldwave]

As I delve into my inverter upgrade I’m assessing the dc wiring. There are two thermal fuses, one 30 and the other one 50 amps. They are jumped to each other. I’m not sure whic fuse protects what. I do see that the solar charger out put goes back to that are and then rides the same wire back to the battery. Seems kinda jerky. I would expect to see a fused connection go directly to the battery, but the mysteries are always in escape electric land. I just found two black wires into one breaker w hitch is a. No no. When I separate my sub panel, I’ll be able to get more circuits on their own breaker. I only have lead acid batteries so I’m wondering if replacing the 8 gauge dc cables back with 6 is worth it especially if I redirect the solar charger out put directly to the battery (fused of course). I have 2/0 cable for the progressive dynamics 1800 watt inverter/ transfer switch. I’ll run 10/2 back to the subpanel and the wfco.
I also am installing a dc shut off for the solar panels. Next year I’ll do the battery upgrade if we don’t get the Bigfoot we are looking at.


Ps I know what the 30 amp thermal is for , is the 50 amp breaker the wfco input ?