USB-c to SBMS0 rabbit hole

So I was looking at making a better than Anker usbC power bank, for my phones flashlight n stuff. Then I saw Wills Electrodacus review. Well long story short I watched, googled, and have now bought Victron 250 inverter, electrodacus SBMS0 WiFi, dssr20, 4 fortune 25Ah cells. I know the cells are small, but they are sexy AF. The whole system is really. Just waiting for delivery of cells and sbms, I was spamming the electrodacus site 9/7 the day he restarted sales. Also got 2 Reidon 50A 100mv shunts. Should I get 60A fuses or 50-40. I mostly will be charging 12v and this is all going in the top box of my Milwaukee pack out.
also using Anker car usbC chargers that I’ll solder wires on and poke out the side of box

Also 100w nrgygo blacked out panel. I’m gonna build an arduino tracker for two 100w panels if they work right too. Cause they look sweet

Have fun enjoy your new "crack"