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Old 11-15-2023, 01:47 PM   #61
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I had a 2011 17 with batteries on the back - enough splash over that I drilled holes in the bottom of the battery boxes, cleaned the tops of the batteries often, used erosive prevention spray, and added distilled water far more often than expected due to the splash loss. I sold the 17 & replaced it with a 2017 21 but if I kept it I would have changed to AGMs.

For different reasons I eventually replaced the lead acid batteries in the 21 with 3 100 amp hour lithiums.
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Old 11-15-2023, 02:01 PM   #62
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Hey Jon -- not two but three lithium batteries -- tight fit? love a picture of the box...
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Old 11-15-2023, 02:33 PM   #63
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Hey Jon -- not two but three lithium batteries -- tight fit? love a picture of the box...
No box but aluminum angle and straps to hold each battery as well as a partition. I believe they are under Jon's rear seat with the u-shaped dinette. Grabbed this from his blog under 21 Trailer Modifications
https://lakeshoreimages.com/trailer2.html
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3 battleborns.jpg   battleborn install notes.jpg  
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Old 11-15-2023, 02:45 PM   #64
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Thanx so much…question is what size wire gauge is being used for lithium looks like regular 4 ga battery cables…thanx
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Old 11-15-2023, 02:49 PM   #65
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Thanx so much…question is what size wire gauge is being used for lithium looks like regular 4 ga battery cables…thanx
He mentions #0 used between batteries.
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Old 11-15-2023, 07:50 PM   #66
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Quote:
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Hey Jon -- not two but three lithium batteries -- tight fit? love a picture of the box...
I am not Jon, but he did inspire me with a lot of my lithium upgrades. Thanks Jon.

I actually installed 4x100A Battleborn batteries in the storage box of our E19
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Old 11-16-2023, 01:20 AM   #67
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My two 206AH Lithiums are 'Y" wired, rather than directly paralleled. each battery goes to its own 125A fuse, then to a 250A positive bus bar, grounds both tie to the shunt then to the negative terminal. I used AWG 4 as its a very short run, and its what I had on hand.
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Old 11-16-2023, 09:13 AM   #68
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My two 206AH Lithiums are 'Y" wired, rather than directly paralleled. each battery goes to its own 125A fuse, then to a 250A positive bus bar, grounds both tie to the shunt then to the negative terminal. I used AWG 4 as its a very short run, and its what I had on hand.
That really does sum it up. You go with what you got and what meets your needs.
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Old 11-26-2023, 02:19 PM   #69
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My brother-in-law (licensed electrician) replaced the connectors for me today and so far all works. Once it sits in the sun for a bit I'll try a load test.

I rarely run it with that much on- the max would be heater, water pump, a few lights, and whatever the fridge uses on propane. And maybe something charging via USB. So if I turn those things on how much is okay as a voltage drop? When my 15A batteries were not holding a load just turning the fan on saw them rapidly go down. I'm going to try after a few hours charging (though voltage is reading fine in the sun now) and then after dark.)
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Old 11-27-2023, 09:40 AM   #70
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CCV (closed circuit voltage) depends on many factors. Age and condition of the batteries, number and depth of deep discharges,, the load on them, and other conditions. Hard to toss out a number.
Not uncommon to see about 12V during use, or even less.
Check your battery water levels.
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Old 11-27-2023, 09:54 AM   #71
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I charged overnight and today I'll back halfway back in (to block solar) and put on the heater and fridge and a light and see how the batteries hold up. (Water level checked).

You guys weren't wrong about the crimper required. My BIL had one that is about 24" long and requires both hands. It worked great!
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Old 11-27-2023, 11:48 AM   #72
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Originally Posted by Bobbie54 View Post
I charged overnight and today I'll back halfway back in (to block solar) and put on the heater and fridge and a light and see how the batteries hold up. (Water level checked).

You guys weren't wrong about the crimper required. My BIL had one that is about 24" long and requires both hands. It worked great!
yup. I picked up tis cheap kit on Amazon, and its done just fine for me.

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Old 11-27-2023, 11:57 AM   #73
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Have that exact same cutter crimper set from Amazon. Used it to make the cables when I added two additional batteries. Worked great.
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Old 11-27-2023, 11:58 AM   #74
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Originally Posted by John in Santa Cruz View Post
yup. I picked up tis cheap kit on Amazon, and its done just fine for me.

I have what appears to be the identical crimper on Amazon, but I wouldn't crimp my 2/0 battery cables with this crimper. It's crimp area is just too small. However for 4 awg and above it works great.

Enjoy,

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Old 11-27-2023, 12:41 PM   #75
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Quote:
Originally Posted by Bobbie54 View Post
I charged overnight and today I'll back halfway back in (to block solar) and put on the heater and fridge and a light and see how the batteries hold up. (Water level checked).

You guys weren't wrong about the crimper required. My BIL had one that is about 24" long and requires both hands. It worked great!
To measure the state of health of your batteries I would use a hydrometer to measure the specific gravity of the electrolyte of each cell. This will tell you if a single cell is in poor health. Easy to do.

https://www.rvtechlibrary.com/battery/bat_test.php

https://www.freeasestudyguides.com/b...vity-test.html

https://www.batteriesplus.com/blog/p...ycle-batteries

- Kathy
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Old 11-27-2023, 12:42 PM   #76
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Quote:
Originally Posted by Perry Butler View Post
I have what appears to be the identical crimper on Amazon, but I wouldn't crimp my 2/0 battery cables with this crimper. It's crimp area is just too small. However for 4 awg and above it works great.
mine says 8, 6, 4, 2, 1, 1/0 AWG ... the jaw dies rotate for the different gauges, and for a longer crimp sleeve you could always do two crimps.

I have a hydraulic crimper (the sort you have to pump multiple times) but find it quite annoying to use when I'm on my own which is 99% of the time.
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Old 11-27-2023, 12:49 PM   #77
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Originally Posted by John in Santa Cruz View Post
mine says 8, 6, 4, 2, 1, 1/0 AWG ... the jaw dies rotate for the different gauges, and for a longer crimp sleeve you could always do two crimps.

I have a hydraulic crimper (the sort you have to pump multiple times) but find it quite annoying to use when I'm on my own which is 99% of the time.
Gordon did two crimps.
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