Okay, so this is a dumb question probably, but I want to run it by people with a lot more experience and knowledge than I have.
I bought my 1/0 AWG THHN cable, 30 feet of it.
I've run 1 leg of my cable so far, hopefully I'll get the return feed knocked out tomorrow. So far, I've used ~ 10 feet of cable. The return will be about the same, then I'll have ~ 10 feet of cable to make smaller connections.
Nothing is hooked up, because I won't have a crimper until November 15th, so I'm going to just kind of lay it out with a little extra to work with.
Pardon the text, but this is how it's hooked up.
A/C Side of things:
SHORE CABLE (30 amp, factory trailer plug) ----> Growatt 3000
A/C Output of Growatt (Romex 1/2 Solid Indoor non-metallic Jacket) --> Power junction box of camper --> Breaker Panel
So basically, I inserted the Growatt between the existing plug, and the junction box that feeds to the breaker panel.
This is where I have questions:
D/C Side of things:
D/C Negative Input to GroWatt = 1/0 AWG THHN (about 10 feet) --> Negative Bus Bar --> ( ??? Run?, Cable AWG???) --> Overkill 100 AMP BMS -->( ??? Run?, Cable AWG???) --> Battery Negative Terminal
D/C Positive Input to GroWatt = 1/0 AWG THHN (about 9 feet) --> Battery Cut Off --> (less than a foot of run, more 1/0 AWG) --> 250 Amp D/C Fuse --> (another less than a foot run, more 1/0 AWG) --> Battery Positive Terminal
I know that I have to run the power leads to the battery from the BMS, but as far as the main 2 legs that go in/out from the battery terminal... Do I need to add that in my AMP calculations in the length of run from the battery to the Growatt? I'm assuming I do.
But, I'm not sure if I could run 2 or 4 AWG cable from the negative bus bar to the BMS to the Battery Negative terminal, and then let the heavier 1/0 run the rest of the length.
Growatt <-> Cable run <-> Negative Bus Bar <-> BMS <-> Battery
Rephrased: Size it from Growatt -> Battery, or can I "break" the size, since the BMS is in between?