Does the main battery call the shots?

[folkers]

I bought my 24' Sport S in January. To date I've put a whopping 375 miles on it. It's an understatement to say I don't drive it much (Sunday car). After doing lots of reading on the forum regarding the Gladiator"s idiosyncrasies, the first thing I did was setup a Noco 2D trickle charger (always plugged in while parked), in an effort to keep the both batteries healthy. My question is: is the main battery (at times) sending a signal to the charger to stop charging....."I'm fully charged now", when in fact the Aux battery could still use more charging? I hope I'm describing the question in a way that can be understood. I'm using an assumption that the charger has the "logic built into it" to sense when a battery is fully charged and to stop charging temporarily (stopping before the Aux battery is also adequately charged.

So, is it necessary, at times, to separate the two batteries and trickle charge them separately, or can I rely on the Noco to do its job when the batteries are connected in parallel?

Maybe my understanding of this is flawed?

Am I over thinking this?

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[DylanM]

The batteries are wired in parallel, so the voltage between them is always going to equalize. Given time, the charger will top up both batteries to full capacity so long as the power needed doesn't exceed the output and duty cycle capacity of the charger. If one battery won't hold a charge like it should, it'll actually draw down the voltage of the good battery until the voltage is the same across both. Isolating and charging each battery separately isn't needed unless you're wanting to troubleshoot a battery depletion problem to determine which one is faulty.

 

[folkers]

Good explanation.....concise. Sound like I really don't have anything to worry about. Thanks

 

[Texbaz]

I think I downloaded this from a thread shadow Pappa, participated in. This might be his schematic either way great visual when just looking for a simple jeep dual battery schematic.

 

[folkers]

Thanks, the visual helps.

 

[ross neill]

I have a 2023 sport my start stop only is ready after aux is charged when I took it to the dealer they said it passed and just need to be charged a week later stop start shows as not to ready so the smart alternator isn’t charging the aux only the main to full the dealership told me to bring it back if it happened again and they would replace the aux under the 3 yr 36000 mile warranty

 

[folkers]

I have a 2023 sport my start stop only is ready after aux is charged when I took it to the dealer they said it passed and just need to be charged a week later stop start shows as not to ready so the smart alternator isn’t charging the aux only the main to full the dealership told me to bring it back if it happened again and they would replace the aux under the 3 yr 36000 mile warranty

Thanks for your input. This stop/start system the Jeep put forth screams to be user configurable in that the folks that don't want to use it can disable it permanently. The end user shouldn't have to purchase an after market solution to disable

 

[Hootbro]

Thanks for your input. This stop/start system the Jeep put forth screams to be user configurable in that the folks that don't want to use it can disable it permanently. The end user shouldn't have to purchase an after market solution to disable

Unless the EPA gets gutted, I doubt one would see any manufacturer option to permanently disable a ESS system. The manufacturers get like a micro credit offset from he EPA for every system that is installed and delivered with a vehicle.

 

[folkers]

Sadly, you're right. Looks like I'm going to have to get used to pushing the disable button, or deploying one of the after market solutions. I'm just glad jeep saw fit to NOT put the EJECT button next to the ESS button.

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