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Converting factory ESS battery system into a (factory) Dual battery setup ?

jebiruph

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You cannot eliminate it. You can rewire it so everything connects to the primary battery, which will present stability issues in the electrical system. You could replace it with a larger battery, but that requires mounting and cabling changes.
It can be eliminated without any issues, JL owners have been doing it for years. Some totally remove it and permanently wire everything to the main battery. Some leave it in and temporarily bypass it with a jumper or by unplugging the battery relay.
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You can rewire it so everything connects to the primary battery, which will present stability issues in the electrical system.
What stability issues? Drain-down at a stop light?

Are you saying I can take the leads and connect them to the main battery terminal?

What about the option of getting a smaller battery so the two can share the main battery space plus that little void in front of it?
 

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What stability issues? Drain-down at a stop light?

Are you saying I can take the leads and connect them to the main battery terminal?

What about the option of getting a smaller battery so the two can share the main battery space plus that little void in front of it?
If you don't use ESS, then you should be okay. The primary purpose of the ESS battery is to keep the computers stable during ESS events. Having the engine and other computers reboot at a stoplight due to low voltage would result in a myriad of odd issues.

The Genesis dual battery kit uses a custom battery tray. It replaces the primary and ESS batteries with two Group 25 batteries that fit in the main battery space. The battery tray can be purchased separately from Genesis.

I can't say for sure on connecting the battery leads. You would have to research some of the other threads on rewiring to just one battery. I have not, since I don't ever plan to do it.
 

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Okay, so I decided to relocate the auxillary battery next to the main by cheating it closer to the firewall and it makes just enough room.

The problem I'm having is a spark when I go to connect the loose ground that attaches to the negative post.

Is there that much draw just sitting there? It does it whether the aux battery is wired or not.

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Okay, so I decided to relocate the auxillary battery next to the main by cheating it closer to the firewall and it makes just enough room.

The problem I'm having is a spark when I go to connect the loose ground that attaches to the negative post.

Is there that much draw just sitting there? It does it whether the aux battery is wired or not.

16437573005782878541632758804408.jpg
It is possibly normal, with the diesel, since it is powering up the computers and the heaters all at once.
 

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It is possibly normal, with the diesel, since it is powering up the computers and the heaters all at once.
Should I check the negative for voltage before connecting it?
 

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Should I check the negative for voltage before connecting it?
If it's just a minor spark when attaching the cable, I wouldn't worry about it. If it's major sparking, like a short, then I would carefully check all the cabling and connection points.
 

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If it's just a minor spark when attaching the cable, I wouldn't worry about it. If it's major sparking, like a short, then I would carefully check all the cabling and connection points.
The big chicken got out the voltmeter and everything checked out as it should so I hooked it up and all is good!

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The big chicken got out the voltmeter and everything checked out as it should so I hooked it up and all is good!

Jeep Gladiator Converting factory ESS battery system into a (factory) Dual battery setup ? 20220201_212556
I'm going to look at doing this with mine, if I can't get them replaced under warranty. My batteries are getting close to three years old, and won't likely last another summer.
 

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I'm going to look at doing this with mine, if I can't get them replaced under warranty. My batteries are getting close to three years old, and won't likely last another summer.
Apparently you can put AGM batteries on their side. I considered opening up the back of the pocket the auxiliary battery sat in and make a little angle bracket to bear all its weight but when I pulled the leads out it seemed everything would fall in place this way, but it's something to consider.
 

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Okay, so I decided to relocate the auxillary battery next to the main by cheating it closer to the firewall and it makes just enough room.

The problem I'm having is a spark when I go to connect the loose ground that attaches to the negative post.

Is there that much draw just sitting there? It does it whether the aux battery is wired or not.

Jeep Gladiator Converting factory ESS battery system into a (factory) Dual battery setup ? 20220201_212556
The sparking is disconcerting, but normal.
 

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Does the Genesis Dual Battery System void the Gladiators Mopar warranty?
 

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Does the Genesis Dual Battery System void the Gladiators Mopar warranty?
You would need to drop the truck hood deep in water to "void the warranty".

If you work on something like this, there is a good chance your. warranty claim would be denied if it has something to do with the charging system. Possibly if it has anything to do with the electrical system since they might try to claim that your system is not providing stable power.

But if your differential blows up, your door hinge breaks, your cam eats itself, then none of that has anything to do with electrical issues.

There needs to be some reasonable causation between the modification and the problem. I say this as someone who has worked as a service writer at a dealer back when I was in college. So with that said, the service writer can make or break whether this becomes a large hassle or a small one.

Sometimes you give the benefit of the doubt when maybe you shouldn't.
 

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Seems better to leave it, replace the main with a more powerful AGM close to 100Ah, then setup an external dual in the bed in some sort of case for the fridge, and put another big AGM in there, cheaper too. That's my plan at least.
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