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Old 05-13-2022, 05:09 PM   #1
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Lifepo4 Battery Question

I am in the process of installing 600 amp hours of lithium batteries in my North Point. I have no problem with the installation but i am not sure how it will effect the electrical system of my 2022 Ram 3500 while towing. I donít need to charge them while iím driving so i donít need a dc to dc charger. My question is will i damage anything if i just leave the truck the way it is.
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Old 05-13-2022, 05:58 PM   #2
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Shouldn't hurt a thing. Your TV can only supply 5-8 amps of current (if I'm not mistaken) with stock wiring when connected.
I installed a relay that only charges RV batteries when my headlights are on so the lithium's (potentially) higher voltage won't keep trying to charge my TV's lead acid batteries when stopped. Unplugging when not towing would work also. You're gonna love the lithiums!
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Old 05-13-2022, 08:41 PM   #3
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John, your post is very timely. I am planning through a lithium battery installation. I had the same question. Do I need a battery isolator or dc-dc charger between TV and 5th wheel.

My thought is $80k truck with lots of electrical stuff. probably worth $200 for a dc-dc or isolator of some type.

Trying to figure out the best option. Will probably just go with a victron dc-dc 20 amp.

What is your plan for charging, inverter, solar, and possibly shunt.
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Old 05-13-2022, 10:57 PM   #4
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What brand of batteries are you thinking of getting?
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Old 05-14-2022, 04:49 AM   #5
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I ordered two 300 amp hour enjoybot batteries. I seen a tear down of them on the Internet and they look pretty good for the price. I also decided to remove the fuse for the 12 V line in the truck that charges the battery in the trailer because with 600 amp hours there’s really no need to charge it when we travel. We don’t travel far distances and I have a generator for charging whenever we need it. We’ll probably add solar panels next year because the system is more than halfway there for solar.
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Old 05-14-2022, 08:08 AM   #6
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Quote:
Originally Posted by JohnWedell View Post
I ordered two 300 amp hour enjoybot batteries. I seen a tear down of them on the Internet and they look pretty good for the price. I also decided to remove the fuse for the 12 V line in the truck that charges the battery in the trailer because with 600 amp hours thereís really no need to charge it when we travel. We donít travel far distances and I have a generator for charging whenever we need it. Weíll probably add solar panels next year because the system is more than halfway there for solar.
Whoís video did you see the tear down on?
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Old 05-14-2022, 10:09 AM   #7
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I saw this video. Although he said it did not have a low temp sensor i will be mounting them in the heated basement.

https://youtu.be/0YDqFKfm9oA
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Traded: 2018 RAM 3500 DRW, 4X4, 4.10, 6.4 Hemi, Curt A20 hitch, Tire Minder

2018 North Point 315rlts with most of the options.
Dish Hopper With 2 Joeys & Birdog Meter, 2-2K Champion Generators
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Old 05-14-2022, 02:47 PM   #8
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Also going with 2 x 100ah LiFePO4's. Sold the group 32 boat anchor. Thanks John for the idea to pull the fuse on the trailer charge line. I was also concerned about the voltage back feed. The residential fridge will be the main draw in the trailer while driving, but from all the videos I've watched on YouTube, it looks like the lithiums should last several hours. We always get full hook ups, so they'll get re-charged at the campground. Also playing with the idea of a 20 amp DC-DC charger. The fuse for the charge line from the truck is 30 amp. Don't know the wire gauge. If I go ahead with the project, I'll have to locate the charge line in the front compartment of the fiver and connect it to the charger. Any thoughts appreciated.
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Old Yesterday, 01:43 PM   #9
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I rewired our trailer such that the 12V+ wire from the 7-way only powers our TPMS signal booster.

Didn't want to risk the trailer batteries drawing down the truck battery while hooked up and not running, although that would rarely happen in our case.

I ended up installing a Victron Orion Smart 12/12-18 DC-DC charger for when we do want to charge while on the road. Ran a dedicated 4 AWG circuit from the truck battery back to the trailer.


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Old Today, 05:53 PM   #10
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Quote:
Originally Posted by JohnWedell View Post
I saw this video. Although he said it did not have a low temp sensor i will be mounting them in the heated basement.

https://youtu.be/0YDqFKfm9oA
I saw that video too. I follow Willís channel on YouTube; itís very informative. I ordered that battery as well. Iím starting off with one and maybe add another if I need it. Itís a little irritating that it didnít come with the m8 bolts to hook it up with. Hopefully thatís the only problem I have with it.
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