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Ultimate Battery Thread


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#81 Vic Harder

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Posted 06 August 2021 - 05:11 PM

Can you charge them fully somehow and confirm voltage and SOC?
Any idea how many charge/discharge cycles those batteries have seen?

 

Just using voltage I agree those batteries are likely toast.  Question is why?  If you only ever discharged to 50% you should still get hundreds of days (and years of elapsed time) of usage out of them.

 

Phil (Wallowa) just sent me this vid:

 

Battle Born 12v Battery: How to Determine State of Charge (vs lead acid) - Bing video


Edited by Vic Harder, 06 August 2021 - 07:11 PM.

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#82 dennis 221

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Posted 07 August 2021 - 03:57 PM

6am on monitor 10.6- off- o o A- 0 W -1.8V (20 -24.) 0 KWH , all means nothing to me.. maybe to you???
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#83 Vic Harder

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Posted 07 August 2021 - 06:11 PM

A picture would be better!
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#84 Wallowa

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Posted 08 August 2021 - 02:38 AM




6am on monitor 10.6- off- o o A- 0 W -1.8V (20 -24.) 0 KWH , all means nothing to me.. maybe to you???

 

========================================

 

Just saw this thread come back alive...I assume you have two AGMs [2x 75ah ?] and that this is a FWC....if that "10.6"  or previous "10.2" is the voltage shown for those batteries, then my guess is that they are either dead-right-there or severely damaged...Vic is correct, a picture of your BMV monitor?

 

If they are damaged or dead like Vic said why?  Most likely insufficient charging and/or excessive draw down..

 

Suggest testing the voltage on each battery separately  and then charging each with a stand-alone battery charger; but then if nothing shows up, take them into to battery shop for a load test...voltage alone may not show a weakness...

 

These are just my WAGs...sorry for your fix!

 

Phil


Edited by Wallowa, 08 August 2021 - 02:46 AM.

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#85 dennis 221

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Posted 11 August 2021 - 01:28 PM

Still trucking. Tried a fwc site in Jackson but they moved an No one knows where. O well
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#86 dennis 221

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Posted 11 August 2021 - 01:36 PM

So if I jump on the lithium battery band wagon .are they just drop in replacement or do I need a whole new solar set up???
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#87 ckent323

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Posted 17 August 2021 - 11:48 PM

Dennis221,

 

Depends on what you have already. 
Do you have a newer truck with a smart aternator or an older truck with a dumb alternator?
How is the camper connecter to the truck (i.e. wire size and battery separator or other components). Is it fused?

Do you have a battery separator or a Blue Sea ACR or a DC-DC charger?

Do you have solar?  What type, model and brand of solar controller? 

Do you have a battery monitor?


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1993 Dodge Cummins W-250 Club Cab long bed, 2007 FWC Keystone





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