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Subject Topic: Electrical advice please Post Reply Post New Topic
Personwerner3
03/4/2010 at 5:08pm
 Location: East London Essex
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We have an old caravan, that we purchased a few years ago.

I bought a new leisure battery (85 amp).  My question is, when I got the caravan there was a Marine offshore charger next to the battery, which says:

Power supply

Input 115/230v -50-60Hz.

Output - 12v   Output 12amp   Output 144watts  - 50-60Hz.

To my inexperienced eye this seems to be a lot for my little battery.

What is the opinion of an electrically minded person please.

Many thanks

Werner

 

 

 


PersonGrampian91
03/4/2010 at 5:24pm
 Location: Midlands
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Depends in the output voltage, If its around 12.8- 13v you should be OK to leave it on, If its above that it could gas the battery and eventually boil it dry.

Thats the problem sometimes you dont know if the charger was only used to topup the battery or left on 24/7 like a caravan charger.


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Personwerner3
03/4/2010 at 5:36pm
 Location: East London Essex
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All I know is that in addition to the data I stated, it says 'unregulated power supply'.

I just have a feeling that it's too strong!  The battery is less than two years old & I've had to top it up twice.

Werner

 


Personnavver
03/4/2010 at 7:26pm
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Output should be 12volt if its 144watts at 12 amp.


Personwerner3
05/4/2010 at 10:43am
 Location: East London Essex
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Hi,...and Happy Easter,.....I've checked the continious output and it says 15 Volt on my Tester ( sorry being so ignorant) when it comes to electrical things;....Thanks again.

  Werner.


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PersonRune Caster
05/4/2010 at 1:10pm
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That will be 15 volts with no loading, when you put a 12 amp load on it you will find the volts will drop to 12.

You best bet is to buy a new charger that you know will trickle charge the battery - that is not saying that the charger you have is no good, just that to protect the investment you made on the battery it might be worth buying a new charger to use with it.



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