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V70 Occasional Camper- Battery Drain

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    V70 Occasional Camper- Battery Drain

    Hi All.



    Looking for some advice on how to reduce battery drain on my 2013 (2014MY) V70.



    During normal use everything works as expected and I never have any issues with the battery. However I occasionally sleep in the car at various events, with regular access needed though the doors and boot. Usually after around 24hrs the matrix driver information display dash shows a “low battery warning”.



    Most other people at these events use van based camper conversions or sleep in a tent, but as the V70 is spacious inside I have made it in to a little occasional camper. I have made a nice little set up for the sleeping arrangements with fully insulated foil backed blinds for every window, levelling chocks, a quality mattress and duvet, a small awning and separate internal lighting (so as to try not to drain the car battery).



    Standard procedure is to park up, set up, lower one of the windows by a few inches for ventilation. At this point I think that the ignition is off, but to make sure that it is I lock the car and unlock again using the key fob.



    To try and minimise further drain, I turn off all the internal lights so that they do not activate each time a door is opened. I have removed the bulb from the internal boot light as it does not appear possible to deactivate this. I generally try and avoid opening and closing the boot to prevent the external rear LED lights turning on repeatedly. I do not use the radio. I do not turn on the ignition again.



    Any thoughts on how I can further minimise battery drain whilst parked and using the car as a camper? Something must be draining the battery whilst the car is unlocked with me inside it, but I can’t figure out what….



    Thanks

    #2
    When sleeping in the car I would suggest closing all doors with the central lock button on the driver's door (as keyfob button would activate the alarm), I quess battery drain is lower when the car is closed.

    You can check the State of Charge of your battery in this app (only in 2010- cars equipped with Battery Monitoring Sensor BMS):


    Battery State of Charge should be 82-85%, "low battery" warning appears under 70-75% SoC.
    You can also check the charge current A (negative values with engine off).
    Rembember to take out /or switch off/ the ELM327, as it draws some current in standby.

    12V socket in the luggage compartment is active at all times, you can e.g. charge your mobile with ignition off when camping.
    Last edited by piotrek; Sep 2, 2019, 11:12.

    Comment


      #3
      There will be events (such as opening a door) which will wake the whole car up (every ECU on the CAN bus) regardless of whether there is any visible action. The whole car will then draw a fair few amps from the battery for minutes until it decides to go to sleep again.

      Your best bet is to disconnect the cars battery once set up.
      2015 V60 R-Design D4 (VEA)
      2009 C30 R-Design 1.6 (petrol)

      Comment


        #4
        Place a solar panel charger on your roof or behind the front windscreen to charge the car's battery from the sun when you are at at your camp and not using the car for the day. Connected to a permanent 12V connection of course.
        A reasonable panel can deliver 1A of current, and a sunny day can put in 8Ah of capacity back in the battery. If your battery is a 50Ah battery, that's more than 10% of the battery capacity.

        Alternatively, get a CTEK Battery Sense (I have one) and view the battery status on your iPhone or Android phone. It'll tell you a pretty accurate State of Charge and allow you to keep an eye on the battery state.

        As batteries get old, they loose their reserve capacity, so your battery may simply be old. Get it tested.
        If it has lost more than 20% of stated capacity, replace it. Consider fitting the largest battery you can in the physical space as you are more demanding on the battery than most.

        All of the above will help you manage the power drain in the car.
        XC90 R-Design MY2009, Black Sapphire Metallic. HP-Sound, RSE, Nav, Tel, ParkingCam, BLIS, ParkingHeater, RestHeat, Removable Towbar, Summer: CRATUS 20x8 on Pirelli Scorpion Zeros 255/45, Winter: NEPTUNE 17x7 on Continental WinterContact 4x4 235/65.

        Comment


          #5
          Thanks all.
          The battery is at least two and a half years old (the time that I've had that car), will plug in my OB2 reader and see if I can find out the battery health using the app linked above.

          I'll also look in to solar trickle chargers if the battery looks OK and I have a few more nights away planned.

          Photo at link for those who are interested

          Comment


            #6
            Looking at your photo, a plug in solar charger that plugs into the 12V outlet in the boot is the simplest, easiest solution.

            Go for the biggest you can afford, get good quality, avoid eBay rubbish.
            You can spend anything from 100 GBP to 1000 GBP, depending on the size you want.

            Good overview page:
            Last edited by SwissXC90; Sep 3, 2019, 04:58.
            XC90 R-Design MY2009, Black Sapphire Metallic. HP-Sound, RSE, Nav, Tel, ParkingCam, BLIS, ParkingHeater, RestHeat, Removable Towbar, Summer: CRATUS 20x8 on Pirelli Scorpion Zeros 255/45, Winter: NEPTUNE 17x7 on Continental WinterContact 4x4 235/65.

            Comment

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