Can AGM batteries be charged through the 7 way plug for winter?

SgtYork
SgtYork Member Posts: 34
in Battery/Electrical & Solar
I have a 2021 TAB 400 and the batteries are at 12.4 volts. Would like to top them off before it gets too cold. Can I run a AGM battery charger through the 12v lead in the 7 way plug? No power availble at the camper but I can run an long extension cord to the camper shed with a battery charger. 

Is this doable? Thanks, Earl

Comments

  • VictoriaP
    VictoriaP Member Posts: 1,496
    Maybe I’m misunderstanding something, but if you’re running an extension cord to the camper shed anyway, why not just use an 15 amp adapter and your 30 amp cord to charge the trailer batteries? What advantage is there to using the 7 pin?
    2019 320s BD Lite, white with blue (“Haven”)
    2015 Subaru Outback 3.6r (unsafe 200lb tongue weight limit until 2020 models)
    2020 Subaru Outback XT
    Pacific NW
  • BrianZ
    BrianZ Member Posts: 1,770
    edited November 2021
    Even without the 15 amp adapter, why would you not want to connect a charger directly to the battery?  We do what @VictoriaP suggests, and we use a 30 amp extension cord in addition to the regular 30A cord, plus the adapter at the household outdoor outlet.
    -Brian in Chester, Virginia
    TV: 2005 Toyota Sienna LE (3.3L V6)
    RV: 2018 T@B 320S, >100 mods 
  • SgtYork
    SgtYork Member Posts: 34
    Thanks for the reply. Cord is over 50ft long. And everytime I tried to connect the TAB 400, TAG, or Mini Lite campers to the outlet it blows a house fuse. But I can run battery charger with no problems.
  • rfuss928
    rfuss928 Member Posts: 1,181
    YES  I made this adapter for easy connection of any charger source to the trailer 7-pin pigtail.


  • SgtYork
    SgtYork Member Posts: 34
    edited November 2021
    Thanks rfuss928. Do you have the pin outs that I need to connect too?

  • rfuss928
    rfuss928 Member Posts: 1,181

  • SgtYork
    SgtYork Member Posts: 34
    Thank you rfuss928!!!

  • SgtYork
    SgtYork Member Posts: 34
    rfuss928 said:
    YES  I made this adapter for easy connection of any charger source to the trailer 7-pin pigtail.



    rfuss928  What battery charger and and voltager do you use. I have 2 6volt agm inline batteries. So can I put a 12volt agm charger to the 7 way? Thanks, Earl
  • Denny16
    Denny16 Member Posts: 5,430
    Yes, yes you can use any 12 VDC charger designed for AGM battereis.  Most new chargers have a switch to set them to AGM or Flooded (lead acid) batteries.
     Cheers 

    2018 TaB400 Custom Boondock,  Jeep Gladiator truck, Northern California Coast.
  • rfuss928
    rfuss928 Member Posts: 1,181
    Denny16 said:
    Yes, yes you can use any 12 VDC charger designed for AGM battereis.  Most new chargers have a switch to set them to AGM or Flooded (lead acid) batteries.
     Cheers 

    Yup, what Denny16 said.  I also use it for my remote solar panel input when needed.  

  • SgtYork
    SgtYork Member Posts: 34
    Thanks guys!!

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