Adding second battery, need bulkhead connector for cables?

Summit Racing





The red cable on the left goes down to wheel well for 2nd battery. You can also hook portable solar or stand alone battery charger.

All of my high current DC cabling uses the ring terminal connectors...


This is perfect for using products like BLUE SEA Terminal lugs, HD Switches, FUSE Blocks, BUS Bars, etc...

Most of my cabling is 2AWG and 4AWG around the battery terminals...

I really observe equal cable lengths and all so that when being charged all of my connected batteries work together.

Check out BLUE SEA DC products on google search...

I do have a smaller battery bank in the bed of my truck which I use one of those 2-pin 4AWG cable connectors (ETRAILER.com) like your post shows. This allows me to supplement my trailer battery bank but I have a big problem trying to keep my batteries all charged together. I have to use separate DC charging setups to get both battery banks charged up in a quick three hour charge time.

You best plan IMO would be to have your two batteries mounted together inside the same battery box location. I found out using the same DC charger for both battery backs my worse case batteries always drained down the better batteries to the older battery performance...

Of course we all have our different defined install problems. Its all about what works best for you...

Roy Ken

How about a trolling motor connector like this one? There are a few different types and some are designed to handle up to 36 volt motors. http://www.basspro.com/Trolling-Motor-Connector-Kit-8Gauge/product/12051808141522/

Not sure it this would help, but I've hooked up 2 sets of 6v batteries on the outside of camper and use these for quick connect/disconnect.

I'm not sure if that's what your looking for.. (can't get the link thing to work)

X-Haibei Battery Quick Connector Kit 175A 2AWG Plug Connect Disconnect Winch Trailer Gray

https://smile.amazon.com/X-Haibei-Battery-Connector-Connect-Disconnect/dp/B00KXKW6WC/ref=sr_1_4?ie=UTF8&qid=1482073848&sr=8-4&keywords=battery+quick+connect

pirlbeck wrote:
I am thinking about using this style.
Link for 200amp connector

That's pretty much what I use to connect my truck charge system to my camper batteries. (maybe not as pretty, and a little lower capacity)
connector

fpoole wrote:
X-Haibei Battery Quick Connector Kit 175A 2AWG Plug Connect Disconnect Winch Trailer Gray

https://smile.amazon.com/X-Haibei-Battery-Connector-Connect-Disconnect/dp/B00KXKW6WC/ref=sr_1_4?ie=UTF8&qid=1482073848&sr=8-4&keywords=battery+quick+connect

Those are like Anderson Connectors.

I added a 2nd battery to my 845 and placed it in the truck bed, like you plan. Used an Anderson connector and ran the cable out the camper where the standard Lance cable is. Under the sink I connected the 2nd battery wires to a 4 position 1-2-Both-Off switch. Has worked great.

The Anderson connectors are the best way to go. These are readily available at NAPA style auto suppliers and Home Depot Stores. Keep it simple.

Also, the connector the OP noted, will not serve you well because you are limiting the electrical transwer for the size of the connector. Just like have the correct guage of cable, your connectors need to be upsized as well. Why do the upgrade if you own work/supplies are going to negate much what you want to gain in power. Don't cut corners here in cable size, connector size and what has not been talk about yet, distance between the two batteries that are being hooked together. You would be better served to have the batteries closer together, if not end to end or side by side.

b

Timely post, I've also planning on doing this in the spring. I have two in the battery box but want to add a couple more in the bed.

I was planning on using the anderson connector. My batteries are in the driver side wing so I may just run the cables in via the existing vent hole and connect them to the existing battery terminals. I only load/unload a few times a year so this may be the easiest solution.

I am not sure on the wirng yet, hoping to buy the exact same batteries so that i can wire them up in parallel with the existing ones without using a battery switch.

For the perfectionist the wiring won't be balanced between batteries I guess but not much choice since my battery box won't fit any more. With the heavy gauge wires I'm using (2/0) I think it will be fine.

The Pollak connector in the OP (or the philips equivalent) is what I used. It is normally called a "liftgate" connector at truck suppliers. A nice robust connector.