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Old 09-14-2018, 12:12 PM   #61
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Click image for larger version

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ID:	186429This is the set up that is on my trailer right now
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Old 09-14-2018, 12:13 PM   #62
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The top two wires in the photo are the positive and negative coming from the inverter… The bottom two wires or my positive and negative coming from the camper… Just trying to figure out which ones I hook to my disconnect switch
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Old 09-14-2018, 12:19 PM   #63
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This is the single Circuit blue sea system disconnect switch that I am usingClick image for larger version

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Old 09-14-2018, 02:52 PM   #64
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So based on the picture of the battery setup I have do I just connect the negative wire from the trailer...(which is the on the bottom right of the picture) to one side of the switch and take a new wire to the other side of the switch and connect it to the positive side of the battery. Is that correct?
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Old 09-14-2018, 03:08 PM   #65
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So based on the picture of the battery setup I have do I just connect the negative wire from the trailer...(which is the on the bottom right of the picture) to one side of the switch and take a new wire to the other side of the switch and connect it to the positive side of the battery. Is that correct?
Couple of things.

You are switching EITHER the Positive from the trailer OR the Negative.

You are putting the switch in the middle of the run from the positive post of the battery to the RED wire (positive) from the trailer. That way the power is SHUT OFF when the switch is OFF (OPEN Circuit).

You will need a short length of RED wire to go from the positive post of the battery to the "INPUT" of your switch and connect the wire that WAS connected to the battery (the one that says "Battery Positive" on it) to the "OUTPUT" of your switch. Don't mess with the negative wire (Black ones) AT ALL in this case.





BREAK BREAK - different item unrelated to how the switch is wired

I also noticed you have an inverter connected to the other posts. May I ask why (other than convenience) that you chose to do that?

I might suggest you also connect the positive RED wire from the inverter to your "OUTPUT" on your cutoff switch. That way one switch will disable all 12 volt power to your camper (including the inverter).

I would also suggest you move the inverter's ground (BLACK) wire from the post that it is on (upper right), to the post the camper's ground is connected to (hard to read but the upper left in the photo). That way your biggest discharge to the batteries will follow an equal path through both batteries the same as the charging and camper load.
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Old 09-14-2018, 03:12 PM   #66
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The way my batteries are in the picture is how they were hooked up at the dealership. I picked it up last Friday.
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Old 09-14-2018, 03:12 PM   #67
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Herk has some very good advice.

But from your questions and statements, I advise you get some onsite help in performing your task. Or just take it to an RV service only shop. I can't imagine they would charge very much to do this for you.
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Old 09-14-2018, 03:33 PM   #68
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Hey Herk

In the last paragraph you talk about moving the black inverter wire .... you said black wire on upperright. The right wire is the red one. Just didn’t know if you said it wrong or not
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Old 09-14-2018, 03:39 PM   #69
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Hey Herk

In the last paragraph you talk about moving the black inverter wire .... you said black wire on upperright. The right wire is the red one. Just didn’t know if you said it wrong or not
Good catch, yep the lower right inverter ground should go on the same post as the upper left camper ground.

The upper right inverter positive should go on the output of your disconnect switch.

MAKE SURE the INPUT wire between the switch and Battery is sufficiently large to handle whatever size your inverter is plus the camper load. You should also make sure your inverter is fused correctly for the inverter draw.
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Old 09-14-2018, 03:43 PM   #70
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Here is my setup. Moved everything off the batteries. Click image for larger version

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Old 09-14-2018, 04:10 PM   #71
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Hey Herk.

Tell me again about the inverter wires and where they go using the top of the photo where the inverter wires are. I just want to make sure we are looking at the picture the same as far as top and bottom ...lol
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Old 09-14-2018, 05:05 PM   #72
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When paralleling batteries, it is important to make the interconnecting wires as short as possible, and identical in diameter and length. The reason has to do with the voltage drop across the wires.


Here is a PDF that explains it better than I can.
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Old 09-14-2018, 05:13 PM   #73
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Hey Herk.

Tell me again about the inverter wires and where they go using the top of the photo where the inverter wires are. I just want to make sure we are looking at the picture the same as far as top and bottom ...lol
So, the inverter should have an on/off switch and a fuse rated for the maximum you want to be able to pull out of the batteries at any given time.

To do that, the positive wire from the inverter should go to a fuse of the correct rating, then from the fuse to the output side of your switch.

The ground of the inverter should go directly to the same battery post as the frame ground and the ground (black wire) from the camper's CONverter.

That way all the grounds are bonded together.

The red wire from the camper's CONverter should also go to the "output" side of your switch (along with the inverter's wire). The wire from the switch's "INPUT" to the battery should be big enough to handle the current from the INverter and the CONverter.

Forgive me for capitalizing the words funny to differentiate between the two. They are not the same, and they are often confused.
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Old 09-14-2018, 05:23 PM   #74
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OK, using the photo as a guide, I read the tags to mean:

Upper Left Side - Battery Ground (from the CONverter)
Upper Right Side - INverter Positive
Lower Left Side - Battery Positive (from the CONverter)
Lower Right Side - INverter Ground


How I would hook this up.

Upper Left Side Battery 1 Ground - Battery Ground from converter, Inverter Ground, Black wire to battery 2's ground post

Upper Right Side Battery 1 Positive - Just the red wire that goes to battery 2 positive post

Lower Left Side Battery 2 - Larger Red Wire the goes to your ON/OFF switch (INPUT) and the red wire that goes to Battery 1's positive post

Lower Right Side - Just the Black wire that goes to Battery 1's ground post

I really hope this helps and does not confuse you more. Also make sure your Battery Disconnect Switch is rated for the total DC load in amps.
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Old 09-14-2018, 05:32 PM   #75
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Battery 1 is the top battery and battery 2 is the bottom battery?
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Old 09-14-2018, 08:33 PM   #76
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Battery 1 is the top battery and battery 2 is the bottom battery?
Yes. Was that helpful?
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Old 09-15-2018, 05:18 AM   #77
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It was very helpful. Especially about moving the inverter wires. Once I turn the switch off I want the power to everything to go off. Thanks so much.
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Old 09-15-2018, 07:09 AM   #78
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Battery disconnect switch

A lot of good information here, but never thought I’d see 70+ post about wiring a battery disconnect switch. Talk about information overload. Lol

Some just remove the ground (black cable) from the battery terminal and call it a day. Putting a switch on simply makes it a more convenient/safer process, not 70 posts complicated.

I’m not being “negative”, again all very good and detailed information here!
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Old 09-15-2018, 07:22 AM   #79
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Thanks for your comment. Sorry to inconvenience you with all the posts.
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Old 09-15-2018, 12:46 PM   #80
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Thanks for your comment. Sorry to inconvenience you with all the posts.


How did I know someone would take offense to my post. Not intended.
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