Wiring Diagram Help

[therookie]

Hello all,

First post and first conversion here. Never worked with electricity before and I need someone to proofread my custom wiring diagram please!

https://postimg.cc/vD4SqYn4

I hope that link works.
Open to critiques on everything (wire size, connections, components, fuses, etc)

Especially need my ground connection checked. Can I ground from my negative bus? What size wire is neccessary to ground to chassis from bus?
And is it simple to add an alternator connection after my build is complete?

Thanks for all your help my dudes and gals.

 

[bullfrog]

Most of us start out with small simple systems and replace a lot of stuff after releasing the “magic smoke” out of several expensive components! I would make a lot of lists of steps so nothing gets over looked. The old saying “Never ask a question you don’t know the answer to.” especially before hooking up the power source applies here. Knowing how much power you need is the first step. It would help to know how long the wire runs will be as well as locations of components. Diagrams are all about theory while being able to see what works in your particular application. If as you state you have no experience I would visit a build or RTR to put eyes on proven systems and methods of installations that work. Keep asking questions but you will need to answer many questions as well.

 

[Weight]

You can use those MRBF fuses on the bus bar, they work well. Assuming quality marine grade wire.  I would have a larger amp fuse at the battery, 300A.  Add fuse to the inverter feed at bus bar, 250A. Get rid of the circuit breaker on the MPPT battery cable. Too easy to switch off. Bad.  Run the MPPT charge cable to a 150A fuse on the bus bar. Use 150 amp fuse for the 4awg to fuse block. Get rid of those anl type fuses. Yes you can use the chassis as a negative return, but not for critical things or high ampere stuff. The inverter needs a return cable to the neg bus. The charge system needs return cable.  Rule #1: Fuses protect wires. 4 awg safe at 160 amps. 2/0 awg safe at 330 amps. Procedure; 1/determine wire size needed for lowest voltage drop. 2/determine fuse size based on wire awg size. I use the largest fuse as they have the least voltage drop.

 

[Truman]

Not bad for a rookie

 

[wayne49]

“Never ask a question when you don’t know the answer.” that is advice for lawyers in court.

I suppose a qualified instructor would ask students questions where the instructor already knows the answer.

Sometimes one has to ask some questions just to figure out how to ask the right question.

 

[bullfrog]

Actually I was referring to the tendency of using experimentation to answer questions. Electricity is very unforgiving. My advice was you should know and verify circuits before applying a power source. This is one area where especially if using expensive components let’s see what happens if I hook it up this way and turn it on is a really bad idea.