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TucsonJim's avatar
TucsonJim
Explorer II
May 02, 2016

Question on Multiple 12V Battery Connections

I have multiple connections I'm trying to make on my positive battery terminal. If I include the two connections the RV manufacturer made, the solar connections, inverter connections, and possibly others, the available real estate is getting very tight. I'd like to run one connection from the battery to something like a 12V buss line, but can't seem to find a 12V buss that can handle heavy gauge wire that is needed for some of these connections. Does anybody have a tidy solution?

Thanks,

Jim
  • Copper water pipe squashed flat and drilled appropriately is inexpensive and effective; the copper used is quite pure. Having a large main fuse between the battery and the bus bar is a good idea.
  • OP here. Thanks for all the suggestions. It looks like there are several viable solutions. If anyone else has a preferred method, please don't hesitate to post it.

    Jim
  • I used copper bar stock, drilled and tapped 1/4" holes in them. You would need a bar of 1/4" thick to handle loads up to 200 amps.

    Edit: Let me look around here and see if I can find a piece of copper bar. If I can, I'll drill and tap one for you. I'm going to assume you'll need one 5/16" through hole to attach to a battery terminal.
  • Is something like this what your looking for?
    https://west.nedco.ca/lug-mechanical/burndy/bibd2-04mt/bibd2-04mt-14-2-0-insul-tap-conn/product/BURBIBD204MT
    These can be found at your local electrical supply house.

    Or google insultap for other sizes.
  • I use one of these Single stud junction blocks.

    I actually use 3 of them in my setup. 2 are used to combine the solar panel inputs in parallel and then one is used in a weatherproof box near the battery for exactly what you are talking about. All the inputs/outputs go to it and then it goes to the battery.

    If you want to see how I used them/them in action here is my solar install which features pictures of them.
  • Something like this might work: Amazon

    Looks like you might have to drill some holes for larger bolts to accommodate larger cable. But the bar is .25 thick
  • Go to your local electical store and they should be able to help you out. No Lowes or Home Depot but a real electrical store.