Electrical problem in Autosleeper Nuevo 2005 (1 Viewer)

[Four of us]

I'm posting this for a friend we have met on the site here in Cavaliere-sur Mer. The 12volt system is discharging very fast when in use, e.g. When in use with five lights on it loses all power within five minutes. The battery and charger have been tested and are working and everything works well when on mains. This is a recent fault which has developed while they have been on the site. Any ideas?

 

[SandraL]

Only 2 reasons possible. Either battery is not holding a charge/not charged. OR current drain is so high it flattens battery.
As all is fine on mains I assume charger supplies the 12volt load so charger works. Is battery fully charged? How long has it been on charge, from flat will take hours to charge, not minutes. Has battery been checked for acid levels? If low with exposed plates will give your symptoms. Do you have voltmeter? With mains charger on expect 13.8 or close. With everything off including charger what is voltage, after 10 mins would expect 12.7 or close. If not either current is being drawn, battery not charged long enough or lastly battery knackered.
Perhaps some info re volts would be helpful.

 

[Four of us]

Votlmeter has been checked and the readings are lower. the reading at mains charger is 13 but at socket only 10. Seems to be a leak between the two? Anything on the 12v system is draining it.

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[SandraL]

Can you read voltage actually on the leisure battery? And with charger switched ,. Also with everything switched off.

 

[Stealaway]

Always suspect knackered batteries first. They are so often the problem and it seems like it now. Disconnect them from the van load and charge them for a day. Then measure the voltage after an hour of charge. Any thing less than 12.0 will mean they are dud.

 

[Four of us]

thank you Sandral and Stealaway. It now seems to have been sorted. It turns out that the internal battery charger wasn't working so it has been disconnected and a mobile one put in. Now all charging correctly , even with the lights on!

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