Forum Discussion

EagleScout-USA's avatar
Jun 08, 2016

When the battery runs dead....

Should the battery run down after a few days of dry camping, and the power awning and power slide are fully extended...will plugging into my running truck offer the necessary power supply to retract the awning and retract the slide? I may face this situation this weekend, and want to ensure I am prepared. Thank you.
  • wa8yxm wrote:
    Unless you have expanded the battery bank the design is normally "overnight".

    SO yes, days of camping it will run down.

    Now: A true DEEP CYCLE (like a 6 volt golf car battery) May be ok if recharged swiftly.

    MARINE/deep cycle.. Well you might get lucky but odds are poor

    Starting batteries down that far are toast.


    In my experience it depends on what exactly you're camping in and how conservative you are with power. My previous 22' TT with one 12v deep cycle battery I could "dry camp" for about 5 days before needing to recharge. With my new to me 32' fifth wheel with two 6V Trojans I went 9 days last year before needing to recharge. Granted this is with being conservative with power usage, using bath house for showers, and switching to led interior lights, but also included two set ups using landing gear and open/close one slide.

    As other have said, check voltage daily or twice daily and recharge as necessary depending on your battery.
  • Thank you all for the advice and direction. I didn't realize the importance of NOT running the battery low. I actually thought that it was good to run it through a full discharge cycle, although I have never done so. I will not be investing in an increased number of batteries, or a high-end generator, as this type of camping will be few and far between; however, now realizing the potential negative impacts of dramatically decreasing the charge of the 12V battery, I will bring my 12-amp charger and 800W generator and let it run for a few hours to ensure I am trouble free. Most of our camping is and will continue to be with shore power.
  • "I didn't realize the importance of NOT running the battery low. I actually thought that it was good to run it through a full discharge cycle"

    Full cycling of NICKEL CADMIUM recharging protocol floated magically over to lead acid batteries. Assumptions can cost a lot of money. BTW, a good AGM battery will suffer less than even a golf car battery from over-discharge. Nevertheless, self-education is the only sure answer to prevent "innocent" mistakes. When I screw up, I blame myself for not taking the time to learn about the subject. "DEAD" is a relative term so attempts to guess exact degree of damage to the battery are shots in the dark.
  • Does this mean you have two twin banks?

    RoyB wrote:
    Additionally I will not start using my batteries again until they are at the 90% charge. This is approximately 12.5VDC

    Roy Ken
  • Ron3rd's avatar
    Ron3rd
    Explorer III
    All good info above and a lesson I learned the hard way is if your batteries go dead, the only thing that will work is the stove.

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