Passing on some info about second battery option.

[64BAwagon]

I opted for the 2nd battery ($135) along with the 220a alternator ($150) on my 2024 3500 L8T gas truck. When I got it I noted that there were a couple of relays on the side of the battery as well as a bus bar and fuses on the top. It was much more than just another battery connected to the main one. I was told yesterday that the components on the 2nd battery are actually part of whats included in the plow package. The system will sense a large power draw from something like a hydraulic pump on the plow and then puts the alternator into a full output mode rather than shutting it off when the battery is charged and the load is low. This apparently prevents the system from having large loads placed on it when its in low consumption mode. 

I bought this option because this truck is used mostly for towing and I wanted extra capacity since the trailer increases the 12v demand. For the money it was a worthwhile option but now I have the added value if/when I sell it and it can easily be used for a plow truck. (it also has the "camper" heavier front torsion bars)

[kf9yr]

If you buy part # 84669070 it comes with the fuses that connect to the bus as well as the fasteners that are fit for the 2nd battery tray.

 

Makes it easy to connect high amperage cables.

 

 

[Dunn]

Well worth the money....if I ordered one 100% I would get it, I usually buy off the lot and rarely do you find them

[64BAwagon]

Thats one of the reasons I like to order mine. I get all the options I want and none of the ones I dont want. 

[Ausslo]

On 9/18/2023 at 12:35 PM, kf9yr said:

If you buy part # 84669070 it comes with the fuses that connect to the bus as well as the fasteners that are fit for the 2nd battery tray.

 

Makes it easy to connect high amperage cables.

 

 

That kit is actually a plug and play for the primary fuse block though you could use it on the auxiliary block with some modifications. I just installed it on mine.

[Another JR]

Part of the assembly that comes on top of the second battery in a gas truck is a battery isolator. Loads you connect to the aux battery are isolated from the starting battery when the truck isn’t running so they won’t deplete your starting battery. This is different from the diesel, which has the batteries directly connected at all times because they both are needed for starting. 

[Ausslo]

On 9/20/2023 at 3:50 PM, Ausslo said:

That kit is actually a plug and play for the primary fuse block though you could use it on the auxiliary block with some modifications. I just installed it on mine.

[GMC4Zee]

I have plow option but be aware that it also includes the striffer front springs which does affect the ride somewhat. I did get the dual batteries also.Harness was included with the option.