After waiting two weeks for an electrician to show up I have tried to get as far as I can myself. I do not know much about this and just can't wrap my head around it....but I think I'm close. This is going in a van I'm working on. Four 100ah lithiums ,40 amp dcdc charger, 2000w inverter. 100 amp sub panel (44 actual amps in panel) Main panel that's a/c d/c D/c side is 150amp (82 actual amps) a/c side is 110v to 3 outlets. Solar is coming later. It will be 200-400 watts. Should I have a positive buss bar for the fuses? Please take a look at my drawing...best I could do, and let me know if anything is inccorect. I have some questions on a couple things I'm unsure on (the grounds) but that will come later. Thanks for looking.