Battery Charge

DanL
DanL Posts: 20
in Battery/Electrical & Solar
When my Tab 400 is in winter storage, I do not have access to an electrical outlet to keep the battery plugged in.     I also cannot remove the battery because I live in a condo.    I am going to use a generator to charge up the battery.     I am wondering if there is a charge time difference between plugging the trailer directly into the generator or plugging a battery charger into the generator and connecting to the battery posts.   Thanks!
2019 Jeep Cherokee pulling a 2018 T@b 400.
Victoria, British Columbia.

Comments

  • N7SHG_Ham
    N7SHG_Ham Posts: 1,261
    I would charge it fully, disconnect the battery with the big red battery disconnect and not worry about it. If you do decide to charge a high quality battery charger Direct to the battery should work better than the WFCO converter.
    2019 T@B 400 Boondock Lite
  • Marceline
    Marceline Posts: 1,767
    DanL said:
    When my Tab 400 is in winter storage, I do not have access to an electrical outlet to keep the battery plugged in.     I also cannot remove the battery because I live in a condo.    I am going to use a generator to charge up the battery.     I am wondering if there is a charge time difference between plugging the trailer directly into the generator or plugging a battery charger into the generator and connecting to the battery posts.   Thanks!
    If it's stored outside there are small (10w) solar panels that will trickle charge the battery to keep it topped up.

    San Francisco Bay Area | 2013 CS-S us@gi | 2015 Toyota Tacoma PreRunner Double Cab

  • DanL
    DanL Posts: 20
    Marceline said:
    DanL said:
    When my Tab 400 is in winter storage, I do not have access to an electrical outlet to keep the battery plugged in.     I also cannot remove the battery because I live in a condo.    I am going to use a generator to charge up the battery.     I am wondering if there is a charge time difference between plugging the trailer directly into the generator or plugging a battery charger into the generator and connecting to the battery posts.   Thanks!
    If it's stored outside there are small (10w) solar panels that will trickle charge the battery to keep it topped up.

    Hello Marceline.     This is a good idea.    Do you have to leave the storage compartment door slightly open to allow the wires to get to the battery?
    2019 Jeep Cherokee pulling a 2018 T@b 400.
    Victoria, British Columbia.
  • pthomas745
    pthomas745 Posts: 4,645
    The batteries, if not under any load, will hold their charge for a long time.  The "self discharge" of is very low.  N7SHG has the right idea.

    Find the comments here about self discharge of batteries:


    2017 Outback
    Towed by 2014 Touareg TDi
  • Sharon_is_SAM
    Sharon_is_SAM Posts: 10,035
    @DanL, as pthomas45 stated, your AGM batteries in your 400, once fully charged, with the battery switch off, will last all winter with limited discharge.  You don’t even need a solar trickle charger.  Just check it once in a while for your own peace of mind and to prove to yourself that your battery is adequately charged.
    Sharon / 2017 T@B CSS / 2015 Toyota Sienna Minivan / Westlake, Ohio
  • Michigan_Mike
    Michigan_Mike Posts: 2,858
    As people have noted the battery should be fine for the winter when fully charged and with the battery switch in the off position.  A fully charged battery has a freezing point around -80 °F while a discharged battery has a freezing point around 20 °F. By keeping the battery fully charged during the winter months, the electrolyte is less likely to freeze and cause unexpected failures.  That's what I do to all my batteries here in Michigan, I charge them up fully, leave them intact (no current draw from anything) in the equipment and have not had any issues after using them in the spring.   

    As for using a small solar panel, Zamp makes a solar port that can be install anywhere on the trailer and would allow you to plug the panel in and out as needed.  



    https://youtu.be/FCfPvS6iTzk?t=17
    Mike - Elmira, Mi / 2019 T@B 400 / 2021 Chevy Silverado LTZ
  • ScottG
    ScottG Posts: 5,688
    All good advice.
    Also, I have a feeling running a generator at your condo is not going to endear you to your neighbors.  ;-)
    2015 T@B Max S (320)
    2015 Nissan Frontier SV V6 4x4
  • BirdieJane
    BirdieJane Posts: 237
    We had an AGM battery failure do to cold last weekend. Battery went from a full charge to nothing in 3 hours after the temp dropped. Check into it. Renogy is sending us a new one.
    not sure how cold it gets where you live, you might want your battery stored in a warm place.
    2017 T@B Outback white w black trim / 2019 Subaru Ascent White with black trim / Birch Bay WA.
    aka BirdieJane towed by Quinn

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