Converter circuit board

[noderman]

Hi all. I Have an electrical question I have had no luck finding answers for when searching. I have replaced my old battery to lithium and changed my converter to a lithium capable charger. The problem I have is that the cable from the battery to the green circuit board pictured will not work as the cable is larger and the space is too tight for a bend in able to connect in the block. My question is do I even need this green circuit board and can I just replace it with another style as pictured, and still use the converter as is?

 

[Gronk]

Your RV really doesn't care what board or even where it is located, so yes, you can install any board you wish.

 

[Bob K4TAX]

Hi all. I Have an electrical question I have had no luck finding answers for when searching. I have replaced my old battery to lithium and changed my converter to a lithium capable charger. The problem I have is that the cable from the battery to the green circuit board pictured will not work as the cable is larger and the space is too tight for a bend in able to connect in the block. My question is do I even need this green circuit board and can I just replace it with another style as pictured, and still use the converter as is?
View attachment 10523

The one on the right appears to be labeled incorrectly. The black terminals at the top would appear to be DC Negative and not DC positive as marked. Red is Positive, Black is negative.

I have the one on the left and had no problem getting #2 stranded copper welding cable into the BATT and GRD terminals. Plus there are 2 fuses on the board which are in line with the battery positive. I don't see any such protection on the one on the right.

 

[noderman]

Wow. I'm not sure if I could get 2 gauge cable in the terminals. Increased from 8 to 6 and while it fits, it was very difficult because the cable comes from the back of the power center. It makes a very tight turn from behind. I'd like to just leave the AC side alone and replace the dc side in a different location. What is the role of the circuit board itself? Does it somehow help regulate charge or is the circuit board basically just to allow for the led lights to turn on with a blown fuse. It's a wfco power center.

 

[Bob K4TAX]

Wow. I'm not sure if I could get 2 gauge cable in the terminals. Increased from 8 to 6 and while it fits, it was very difficult because the cable comes from the back of the power center. It makes a very tight turn from behind. I'd like to just leave the AC side alone and replace the dc side in a different location. What is the role of the circuit board itself? Does it somehow help regulate charge or is the circuit board basically just to allow for the led lights to turn on with a blown fuse. It's a wfco power center.

The circuit board serves as a distribution panel for the various DC circuits. This circuit board has nothing to do with the AC side or voltage. Strictly DC. Yes, it does have an individual fuse for each DC circuit and there is a LED to show when the fuse has failed or blown.

Whatever size wire you can comfortably work around and into the circuit board/fuse block is OK. However, the bigger size wire from the battery to the fuse block reduces resistance and will make appliances, pumps, and other DC-operated items more efficient.

The one on the left in your picture does the same thing except it has a connection for the converter which is used to charge the battery when on shore or generator power. I don't see this on the one on the right.

Frankly, I'd use what is there and "make it work". Moving and bending the wire in tight spaces is not fun, but sometimes necessary.