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Lithium Battery…Ok to Leave in Camper Over Winter

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  • RTWCTSRTWCTS Member Posts: 134
    Sharon_is_SAM said:
    how did you disable the solar?
    In the Victron APP:
    -Select MPPT the charge controller 
    -Select the gear icon in the upper right of the screen
    -Select Battery from the menu
    -On the third option down toggle Charger Enabled to the off position
    2023 TAB 400 Boondock
    2018 T@B 320 Sold
    Racing the Wind and Chasing the Sun
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  • Sharon_is_SAMSharon_is_SAM Administrator Posts: 9,727
    RTWCTS said:
    Sharon_is_SAM said:
    how did you disable the solar?
    In the Victron APP:
    -Select MPPT the charge controller 
    -Select the gear icon in the upper right of the screen
    -Select Battery from the menu
    -On the third option down toggle Charger Enabled to the off position
    I know how to do it, but there has been discussion that Victron only wants the disable feature used for maintenance intervals - not for storage periods.  Since @manyman297 removed the battery, doesn’t that leave the leads from the solar controller exposed?  Would it be better to disconnect the solar panels from the controller?
    Sharon / 2017 T@B CSS / 2015 Toyota Sienna Minivan / Westlake, Ohio
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  • RTWCTSRTWCTS Member Posts: 134
    Sorry @Sharon_is_SAM. I didn't infer the depth of your question from the words written in your previous post. Nor did I mean to insult your intelligence...
    2023 TAB 400 Boondock
    2018 T@B 320 Sold
    Racing the Wind and Chasing the Sun
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  • AnOldURAnOldUR Member Posts: 1,371
    edited October 31
    Sharon_is_SAM said:
    Would it be better to disconnect the solar panels from the controller?
    Wouldn't the easiest way to do this be pulling the controller fuse that goes between the PV positive connection on the controller and panel?

    Also, can someone point to a link that says not to leave solar charging off in the app for extended periods of time. All that I've seen is the note in the app that says "intended for maintenance purposes only". In my eyes, turning it off while in storage is part of maintenance.
    Stockton, New Jersey
    2020 nuCamp T@B 320S * Jeep Wrangler

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  • Sharon_is_SAMSharon_is_SAM Administrator Posts: 9,727
    No worries @RTWCTS!  I am just trying to understand why Victron doesn’t want the controller disabled.  I guessed (above) that they were concerned about controller failure.  

    Anyway, if you remove a battery, aren’t the exposed leads from the controller a potential problem?

    @AnOldUR.
    Sharon / 2017 T@B CSS / 2015 Toyota Sienna Minivan / Westlake, Ohio
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  • manyman297manyman297 Member Posts: 1,349
    @Sharon_is_SAM I disabled it as described. Not sure why Victron says not to use the function for long-term storage. Maybe I should pull the fuse to be safe? Now you’ve got me worried.
    2021 400 BD
    2020 Tacoma TRD Off-Road 
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  • pthomas745pthomas745 Moderator Posts: 3,932
    @manyman297 nobody seems to know at Victron, either.  I cannot imagine why they think this might be necessary.

    2017 Outback
    Towed by 2014 Touareg TDi
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  • BillCBBillCB Member Posts: 30
    FWIW I have turned off charging with the Victron app (despite the message re maintenance), then ran the fridge until the battery was down to 75% charged, then turned the battery disconnect switch off. Finally I detached the wires from the battery terminals, making sure they couldn't touch.

    I do wonder if the battery shouldn't be left with a lower charge. My EV has a lithium battery too and it is recommended it be stored at just 35%. But I've gone with Battleborns recommendation.
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  • MNtabernacleMNtabernacle Member Posts: 20
    edited October 31
    I'm with @Marleecamps on this one. We live in north metro Twin Cities area, and get subzero regularly. I've installed two 200Ah Renogy Core Li this season along with 350W rooftop solar, and really enjoyed the freedom to be off-grid. After the season ended, I switched off the solar panels (I used a Blue Sea Systems switch to isolate from the solar controller), and let the batteries drain off to 50% as I did my late season maintenance and repairs (shower floor cracks!).
    I left the batteries installed for the trip to storage this week, then pulled them for the warmth of my basement, as Renogy recommends no storage below -13F. Time to hunker down until next spring.
    Tim & Joan, Anoka Minnesota
    Silver on Silver 2018 T@B 400, 2018 GMC Sierra 1500 Crew Cab
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  • BillCBBillCB Member Posts: 30
    I live in Tobermory, ON, the same latitude as the Twin Cities but with a lacustrine climate, much milder in the winter. We only get a few nights as cold as zero F. I rigged a 100 watt bulb in the space under the bed near the battery and ran an extension cord to my home. On days it gets really cold, I just plug it in.
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  • manyman297manyman297 Member Posts: 1,349
    @BillCB I did the exact same process for ours. 
    2021 400 BD
    2020 Tacoma TRD Off-Road 
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  • BillCBBillCB Member Posts: 30
    Great minds think alike....!
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