[Marine battery] How long will it last?

kdawg
kdawg Member Posts: 27
in Battery/Electrical & Solar
We are attempting our second boon docking with a Tab 320 CsS (2018) and have upgraded to a marine battery. How long will this last us, and is it okay to charge on our car (we do this when traveling). 
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  • Sharon_is_SAM
    Sharon_is_SAM Member Posts: 10,061
    When you say marine battery do you mean a lead acid, AGM or lithium?  What is your amp rating?  Do you have solar? If you have a charge wire with your 7 pin, you can charge, but depending on your TV, it may be limited.
    Sharon / 2017 T@B CSS / 2015 Toyota Sienna Minivan / Westlake, Ohio
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  • pthomas745
    pthomas745 Administrator, Moderator Posts: 4,542
    Show us a picture or link to the battery. Tell us the year and model of the trailer.  What fridge do you have?  A 2 way fridge?  Or a 3 way fridge that can run on propane?
    2017 Outback
    Towed by 2014 Touareg TDi
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  • Sharon_is_SAM
    Sharon_is_SAM Member Posts: 10,061
    A CSS has a 12V frig.  No propane.
    Sharon / 2017 T@B CSS / 2015 Toyota Sienna Minivan / Westlake, Ohio
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  • pthomas745
    pthomas745 Administrator, Moderator Posts: 4,542
    @Sharon_is_SAM Thanks...I should never post before coffee!
    2017 Outback
    Towed by 2014 Touareg TDi
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  • Marceline
    Marceline Member Posts: 1,748
    kdawg said:
    We are attempting our second boon docking with a Tab 320 CsS (2018) and have upgraded to a marine battery. How long will this last us, and is it okay to charge on our car (we do this when traveling). 
    I budget about 30ah power consumption per day, 40ah when the ambient temperature is really high (90+). What is the amp hour capacity of your battery? Do you have any solar panels? 
    Your tow vehicle may provide some power to the T@B battery, but if the fridge is running the net gain might be zero. 
    San Francisco Bay Area
    2013 CS-S us@gi
    2015 Toyota Tacoma PreRunner Double Cab
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