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  1. #1
    Left The Driveway tasmal's Avatar
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    Inverter/Charger

    I converted my battery bank too (2) 12-volt AGM deep cell batteries from (2) 12-volt wet cell Deep cycle batteries is the inverter/charger that is in my Solitude 3350rl ok to use or do I need to do something to it or change it out to a different inverter/charger? Thank you to everyone that chimes in I really appreciate it verrrrrry much.
    2015 RAM 3500 Laramie Cummins Diesel ( the Black Peril ) with Pull Rite 2600 Hitch
    2019 Grand Design Solitude S-CLASS 3350RL-R (NO NAME YET )

  2. #2
    Site Team traveldawg's Avatar
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    On my rig I had a separate inverter and converter, not a combined unit. I changed things out to AGMs and a Xantrex Inverter/Converter. I doubt the cheaper converter GD installed would work well for the AGMs, but honestly - I never bothered to check.

    I had to set my Xantrex so it knew I had AGMs and not wet cells.
    Larry KE4DMG
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  3. #3
    Site Team Ynot4me2's Avatar
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    I hope someone will correct me if I'm wrong but I dont think it matters between AGM and wet cells. As long as you dont mix them together. You only need the change when going to lithium

    Sent from my SM-T580 using Tapatalk
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  4. #4
    Fireside Member mdwilliams44's Avatar
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    Cool Not sure that its all about "can I do it"

    Quote Originally Posted by Ynot4me2 View Post
    I hope someone will correct me if I'm wrong but I don't think it matters between AGM and wet cells. As long as you dont mix them together. You only need the change when going to lithium

    Sent from my SM-T580 using Tapatalk
    SO, my understanding, and believe me I know it is not a specialist's understanding, is that it DOES matter for several reasons.

    First is that different chemistries have different charging profiles. I do realize both contain lead/acid, however my understanding is that AGM and original Lead/Acid are significantly different in the way they act.

    This also includes their discharge characteristics, and hence, their need to have different failsafe characteristics.

    I also understand that many charging systems have choices that include FLA, AGM, LIFepo4.

    Now, as to whether or not it will "work" IMO, the FLA and AGM types are close and so chargers will be similar, and I suppose inverters would be also, with the caveat that the failsafe settings mentioned earlier need to be in place.

    Just the opinion of someone who has spent a year or more studying the pros and cons of LIFePo4 vs. AGM. I still am on the fence, for what it is worth.

    Williams&Williams

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    Site Team traveldawg's Avatar
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    I'm hardly a battery expert. I just tend to follow the directions on the Inverter/Charger.

    There must be a difference between all the types of batteries as far as charging them since my Xantrex instructions said to change the type to AGMs when I installed them. As to what that difference is, I have no idea.

    My Xantrex has options for the following kinds of batteries:  (Flooded),  (AGM),  (Gel),  (Custom)  (LiFePO4
    Larry KE4DMG
    2022 F-350 KRU SRW LB - Airlift 5000+, ForScan, 37 RDS Aux Tank,
    2019 310GK-R - Sailuns; MorRyde IS; Disc Brakes; 20K Reese Goosebox
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  6. #6
    Site Sponsor orbiker's Avatar
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    Quote Originally Posted by tasmal View Post
    I converted my battery bank too (2) 12-volt AGM deep cell batteries from (2) 12-volt wet cell Deep cycle batteries is the inverter/charger that is in my Solitude 3350rl ok to use or do I need to do something to it or change it out to a different inverter/charger? Thank you to everyone that chimes in I really appreciate it verrrrrry much.
    The factory converter is a 3 stage charger. A 4 stage converter like a Progressive would be better. Your batteries will like it. KEN
    Backpacker and tent camper all my life, including BSA as a kid and adult.
    Motorcycle trips across the USA with a tent - 1978 to Present.
    02-10-2005 - 2002 F350 SWD PSD and 2003 Citation 10'8S mostly for Crater Lake Ski Patrol.
    10-29-2015 - 2016 Grand Design 380TH. It's HUGE compared to a camper.
    10-19-2018 - traded truck for a 2016 Ram 3500 DRW Laramie CC 4 X 4 Long Box.
    03-16-2019 - Traded Momentum for a New 2018 374TH-R Solitude
    FULL TIME RV'er Nov 2021

  7. #7
    Fireside Member mdwilliams44's Avatar
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    Three stage or four stage charger, or???

    Quote Originally Posted by orbiker View Post
    The factory converter is a 3 stage charger. A 4 stage converter like a Progressive would be better. Your batteries will like it. KEN
    Ken, it is my understanding that a four stage charger is not of any additional value to a LIFePO4 battery. I say this after reading many blogs wherein minds much smarter than me, opine that a LiFePO4 battery has several unique attributes.
    1) it does not benefit form being fully charged, and when over charged starts to degrade in terms of lifetime.
    2) float charging is not an option, or at least not a requirement for LIFePO4. In fact, it only extends the charge farther than this type of battery needs and wants for optimal life and performance.
    3) there is value in charging to less than 100 % SOC. This is because, although you have slightly less total available discharge capacity, your lifetime is extended up to 500%.
    4) LIFePO4 is widely used in the R/C field (radio control). Charging profiles used there show that these batteries can be charged at 3C for a quick charge, and when terminal V is reached shut off completely rather than "soaked".

    I do not know how accurate these statements are, as I am still researching, but if this is accurate, then a charger with multiple stages that ar not specific to LIFePO, are not useful, and could actually be harmful to these batteries.

    Williams&Williams

  8. #8
    Site Sponsor orbiker's Avatar
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    Quote Originally Posted by mdwilliams44 View Post
    Ken, it is my understanding that a four stage charger is not of any additional value to a LIFePO4 battery. I say this after reading many blogs wherein minds much smarter than me, opine that a LiFePO4 battery has several unique attributes.
    1) it does not benefit form being fully charged, and when over charged starts to degrade in terms of lifetime.
    2) float charging is not an option, or at least not a requirement for LIFePO4. In fact, it only extends the charge farther than this type of battery needs and wants for optimal life and performance.
    3) there is value in charging to less than 100 % SOC. This is because, although you have slightly less total available discharge capacity, your lifetime is extended up to 500%.
    4) LIFePO4 is widely used in the R/C field (radio control). Charging profiles used there show that these batteries can be charged at 3C for a quick charge, and when terminal V is reached shut off completely rather than "soaked".

    I do not know how accurate these statements are, as I am still researching, but if this is accurate, then a charger with multiple stages that ar not specific to LIFePO, are not useful, and could actually be harmful to these batteries.

    Williams&Williams
    YES
    The lithium batteries charge at a max charge till charged. I have a non-lithium charger that needs to go to another home. KEN
    Backpacker and tent camper all my life, including BSA as a kid and adult.
    Motorcycle trips across the USA with a tent - 1978 to Present.
    02-10-2005 - 2002 F350 SWD PSD and 2003 Citation 10'8S mostly for Crater Lake Ski Patrol.
    10-29-2015 - 2016 Grand Design 380TH. It's HUGE compared to a camper.
    10-19-2018 - traded truck for a 2016 Ram 3500 DRW Laramie CC 4 X 4 Long Box.
    03-16-2019 - Traded Momentum for a New 2018 374TH-R Solitude
    FULL TIME RV'er Nov 2021

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