Leisure battery current drain

Discussion in 'Tech/Mech General' started by stevec, Sep 14, 2015.

  1. stevec

    stevec Funster

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    We've just taken delivery of a new Burstner Nexxo T660. It's been sitting in the drive since Thursday afternoon and I checked the voltage on the monitor panel tonight and it says hab battery is 12V. So immediately plugged in to the mains. 90Ah battery. MH is alarmed and the media unit (one of these fancy Zenec all singing/dancing things) is connected to the leisure battery (or so dealer told us). I'm a bit concerned about such a quick drop in volts. I'll put a meter in circuit to check the drain tomorrow (but a bit concerned about disconnecting the battery from everything (EBL99 fitted)). Is this to be expected on a modern MH? We've not knowingly put any load on the leisure battery.
     
  2. DP_JAY

    DP_JAY Funster Life Member

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    Sadly, yes.
    Many modern motorhomes put 1 amp or more drain on the battery all the times.
    Make sure EVERYTHING that can be turned off is turned off.
     
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  3. bartiny

    bartiny

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    Might be worthwhile investing in a solar panel?

    Just a thought :)
     
  4. Lenny HB

    Lenny HB Funster

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    With ELB in standby and your stero in standby battery should last at least couple of weeks maybe 3 weeks.

    Was the battery fully charged when you took delivery & what type of battery ?
    If it's a Banner AGM like Hymer fit, when used with a ELB99 needs to be on the gel setting and once at 14.3 v will hold at that voltage for 8 hours for a full charge. Still will not be quite a full charge as the ELB does not have an AGM setting, but appears to work OK on our Hymer.
     
  5. stevec

    stevec Funster

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    Jay,
    Thanks for confirming that. My last van was 10 years old so less sophisticated. If it's normal then I don't have to worry about anything being wrong.
    Bartiny,
    I have two 130W solar panels in my hall along with ally angle and Sikaflex! So solar is on it's way. I've spent the last two days routing the wires from the roof (dealer installed cables through the roof to keep hab warranty intact). If anyone wants to know where to route solar cables for this van let me know. I know down to the last screw what needs removing (quite a lot) to avoid drilling any holes!
     
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  6. Don Quixote

    Don Quixote Funster

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    As already stated your control panel will draw around 1 amp or a little more ALL the time whilst switch on.
     
  7. DP_JAY

    DP_JAY Funster Life Member

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    Not familiar with your exact van & its equipment but many have a frost protection device on the boiler which draws .5 amp plus the draw from the control panel etc.
    With a 1 amp draw on a 90amp battery it will be flat in 48 hours (following the 50% rule).
     
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  8. stevec

    stevec Funster

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    I'd switched the control panel off. I had been told that the frost stat was mechanical and not electrically driven. I'll check before I disconnect the battery and all the water drops out!
     
  9. DP_JAY

    DP_JAY Funster Life Member

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    Which is why I said I am not familiar with the OP's van, some are mechanical & some are electrical.
    I know mine is mechanical but I also know of those who have lost all their water when a fuse blows or they disconnect the battery.
     
  10. Lenny HB

    Lenny HB Funster

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    If it's a c6 or c4 it will be mechanical and valve will have a blue knob, the older combi's had an electrical one with a red knob and they only draw 35ma not half an amp.

    I suggest you hook up to the mains for a couple of days to get the battery fully charged then disconnect from mains and turn of control panel and monitor the battery voltage and see how it goes.
     
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