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Subject Topic: loss of power leisure battery Post Reply Post New Topic
Personharrybo
09/2/2015 at 8:44pm
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I have got a hymer motorhome just lately leisure battery goes flat even when connected to 240 supply this in turn drains the starter battery when out on road both batteries recharge but within a couple of hours leisure battery drops below 10 volts any help would be very appreciated


PersonBilly 3
09/2/2015 at 8:57pm
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When plugged into mains check voltage at leisure battery, should be over 13v. If so then your charger is ok, if voltage is low then charger is not charging. Check both leisure battery & engine battery engine off & unplugged from mains. Is there a discharge showing? If there is, find the cause.

If everything is otherwise ok then probably leisure battery has had it. If engine battery is going flat as well for no reason then perhaps both batteries have had it, are they old?


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bald eagle
09/2/2015 at 9:19pm
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How old is the battery.

-------------
Life is to short,be happy have fun.
regards
bald eagle


Personharrybo
11/2/2015 at 12:49pm
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Thanks for the advice Leisure battery showing 8.7 volts starter battery 14.5 volts thats after 2 days on 240 supply both batteries nearly 11 years old


Personbilly
11/2/2015 at 1:10pm
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The starter battery is not usually charged from motorhome charger off EHU. It does show your starter battery is ok though. Have you checked charger is putting over 13volts into leisure battery while plugged into mains? If it is that just leaves leisure battery & after 11yrs you might as well replace it.

If you find you starter battery sounds a bit tired as well then you could replace both then you know you will have reliability.


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PersonWendyhouse
11/2/2015 at 1:10pm
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Hi
The link might be useful http://www.campingandcaravanningclub.co.uk/GetAsset.aspx?id=fAAxADMANQAxADAAfAB8AFQAcgB1AGUAfAB8ADAAfAA1

Another thought. My charger has a switch the directs the charger to either leisure or vehicle battery.
The switch is at the back of a cupboard and can be knocked accidently to the vehicle battery position.


Personnavver
11/2/2015 at 2:06pm
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Quote: Originally posted by harrybo on 11/2/2015
Thanks for the advice Leisure battery showing 8.7 volts starter battery 14.5 volts thats after 2 days on 240 supply both batteries nearly 11 years old


Unless the starter battery was removed from the charger for a while, 14.5 volts indicates it is still being charged. 8.5 volts for the leisure battery shows it is a gonner. But, given the mystery of the starter battery voltage, are you sure the charger was charging the leisure battery and not the starter battery.

If the leisure battery was not being charged, perhaps because a switch was in the wrong position, the batteruy may have failed due to not being charged. You really need to make sure it was being charged otherwise the new battery will also fail.


Personbilly
11/2/2015 at 5:44pm
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Not all motorhome EHU electrics are set up to charge starter battery as well. Without more details one can only give general advice but 11yr old batteries have done well to last that long.


Persondavyboy1
11/2/2015 at 9:01pm
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Harry 1st make sure you have the mains power switched on,but its more likely that you have a cell going down on the battery to test charge the battery for 4/5 hours on slow charge and stand for a hour then have it drop tested its free at most garages

-------------
Dave


PersonTinnie
12/2/2015 at 8:33am
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An 11 year old battery has almost certainly lived its life. I would only expect 5 years, any longer and your on-board charger will be working too hard.

You may find this useful...

http://www.aandncaravanservices.co.uk/battery-technology.php

This bloke, (Allan), really knows his subject.

Hope this helps.



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