Advice please Flat engine battery

Discussion in 'Motorhome Chat' started by kaybee, Apr 6, 2016.

  1. kaybee

    kaybee Funster

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    Hi Folks
    Had the motorhome on charge all day yesterday only to go out to it today and discover I have a flat engine battery. I mistakenly thought that the engine battery automatically charged up when I had it plugged in but it only charged the leisure batteries. I have now got it charging the engine battery only but I assume it will take a full day to charge. Question is can I start the engine whilst pluged into the mains or am I likely to blow the house electrics? Thank you
     
  2. tonka

    tonka Funster Life Member

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  3. DanielFord

    DanielFord Funster

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    As above, our van will not start when hooked up, alarm sounds and engine will not turn over.
     
  4. Geo

    Geo Trader - Funster

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    Mine will(y) and it will let you drive off still plugged in:giggler:
     
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  5. TheCaller

    TheCaller Funster

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    As a generality, I'd say it is always better not to try & start the engine while you have a mains charger in the process of charging that battery. At the very least, it's going to make the charger run at it's maximum output. Other than that, a decent charger shouldn't be damaged by doing so. I suppose an intelligent charger might be confused into thinking the battery was duff, but that would be fixed by turning the charger off & on again.

    There is a possibility of blowing a fuse or tripping a cut-out if you are unlucky. If it does blow the house electrics then it has shown up a more serious problem altogether!

    I'm assuming that you have a built in charger in the motorhome that you have to switch between charging the leisure batteries only or the starter battery only?
     
  6. Zepp

    Zepp Funster

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    And mine :LOL:
     
  7. Peter & Elaine

    Peter & Elaine Funster

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    and me
     
  8. John Laidler

    John Laidler Funster

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    It shouldn't take all day to charge up enough to turn the engine over. A few hours should be enough but the battery works t be anywhere near fully charged so don't switch the engine off until you have driven for a few more hours.

    However, worth investigating why the engine battery is flat. It may be faulty.
     
  9. golly

    golly Funster

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    Get one of these excellent bit of kit
     
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