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Old 01-10-2021, 11:06 AM   #1
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House battery

Hello all, have a 2018 Jayco RedHawk 26. Need to change the house battery, only one on this rig. Would like your opinions on the Universal 12V 100Ah AGM Sealed Lead Acid Battery UB121000 Group 27. Thanks! Steve
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Old 01-10-2021, 03:55 PM   #2
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Steve, what demands will you be placing on the battery? Always on hookups? Boondocking for long stretches?
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Old 01-11-2021, 08:28 AM   #3
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The biggest question is whether you have an old charger with one voltage charge or a newer one that is automatic 3 stage voltage charge.
The battery specifically says 'constant voltage charge'

Have looked at this battery, looks good except the constant voltage thing, I am in the process of upgrading the electrical system in my '05 one of the things I am changing to is the three stage charging.
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Old 01-12-2021, 08:35 AM   #4
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2-3 days boondocking. Have generator.
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Old 01-12-2021, 08:36 AM   #5
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Have 3 stage charger
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Old 01-12-2021, 12:57 PM   #6
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Quote:
Originally Posted by Marina View Post
Hello all, have a 2018 Jayco RedHawk 26. Need to change the house battery, only one on this rig. Would like your opinions on the Universal 12V 100Ah AGM Sealed Lead Acid Battery UB121000 Group 27. Thanks! Steve
Last year I replaced my 31FS' original wet 12V with a sealed AGM of slightly more capacity. I did this to free myself of the need to monitor the water level in the wet battery. The change has been good.
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Old 01-13-2021, 09:57 AM   #7
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Originally Posted by Marina View Post
Hello all, have a 2018 Jayco RedHawk 26. Need to change the house battery, only one on this rig. Would like your opinions on the Universal 12V 100Ah AGM Sealed Lead Acid Battery UB121000 Group 27. Thanks! Steve
For a couple hundred $ more you can buy a 100 a/hr lithiun with a warranty and have 100 a/hrs of usable power
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Old 01-13-2021, 06:51 PM   #8
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For a couple hundred $ more you can buy a 100 a/hr lithiun with a warranty and have 100 a/hrs of usable power
I'd love to be able to update the house battery to lithium but I just haven't found a good option to fit in the space reserved for the house batteries under the entrance stairs. I live in CO and am concerned about damaging a lithium battery by charging it when it's below freezing. Since the stairway battery well is open to the environs it gets quite cold in there in the winter. The stock PD charger that comes with the 24B has a lithium switch so it will provide 1the correct voltage for a lithium battery but it doesn't have the smarts to cutoff the charging when its below zero and I haven't found a group 24 sized Lithium Battery that has a BMS with low temp cutoff. Maybe I'm overthinking the situation but I don't want to spend $500+ on a battery that will be damaged unless I remove it from the rig during the winter months.

AGM is definitely an option and comes with lower maintenance until I can move the batteries somewhere inside the rig (maybe under the bed?) and redo all the wiring. That's not a small job though.

-Brian
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Old 01-13-2021, 09:03 PM   #9
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The BMS inside the lithium battery will not allow it to be charged below freezing. Most BMS s are set at 27 F
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Old 01-14-2021, 08:48 AM   #10
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Originally Posted by Brian_HR View Post
I'd love to be able to update the house battery to lithium but I just haven't found a good option to fit in the space reserved for the house batteries under the entrance stairs. I live in CO and am concerned about damaging a lithium battery by charging it when it's below freezing. Since the stairway battery well is open to the environs it gets quite cold in there in the winter. The stock PD charger that comes with the 24B has a lithium switch so it will provide 1the correct voltage for a lithium battery but it doesn't have the smarts to cutoff the charging when its below zero and I haven't found a group 24 sized Lithium Battery that has a BMS with low temp cutoff. Maybe I'm overthinking the situation but I don't want to spend $500+ on a battery that will be damaged unless I remove it from the rig during the winter months.

AGM is definitely an option and comes with lower maintenance until I can move the batteries somewhere inside the rig (maybe under the bed?) and redo all the wiring. That's not a small job though.

-Brian
Brian, Regarding location for Batteries. Did you see the photos I posted. I also posted them in the posted Photos Section in an Album "Lady Grey" I don't know where the other post went that had the info. Richard
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Old 01-14-2021, 05:44 PM   #11
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Battleborn now offers a heated lithium option.
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