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Subject Topic: Replace leisure battery for transformer
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29/5/2012 at 6:21am
 Location: Bolton
 Outfit: Smart but casual.
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We have a old caravan which has never been fitted with a Zig/charging system. It is presently fitted with an elderly110 amp which we suspect will have popped off this mortal coil over winter.

Want to replace battery with an transformer. Used to have a French folder years ago and this had one fitted, and if you always on hook up, why bother with a battery?

Anyone one done this? Got any reccomendations to source transformer?

Thanks for any help.



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TomnGill




29/5/2012 at 9:37am
 Location: Yeadon Leeds!
 Outfit: Swift Challenger & Defender 110SW
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what is the model number on your Zig unit, you may find that is powerful enough to act as a power supply without a battery, all you would need to do is isolate the battery terminals (read plastic bag and tape) to stop them shorting.



29/5/2012 at 11:55am
 Location: Bolton
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It has never had a Zig fitted.



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TomnGill




29/5/2012 at 12:45pm
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You need something like this Connect up to your mains supply & you have a 12v feed to your lights & tap, etc, it would also charge leisure battery if fitted. I'm guessing what you have at the moment is mains supply with leisure battery that is charged only from car while towing?


29/5/2012 at 1:50pm
 Location: Yeadon Leeds!
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oops, sorry, my mind reading what it thinks is there!!
the charger tentz linked to look ok, it has a 12.5A output.


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31/5/2012 at 5:55pm
 Location: Bolton
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Dont want to fit another battery, just want to run the 12 volt side of a transformer.

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TomnGill




31/5/2012 at 6:05pm
 Location: Gloucester
 Outfit: None Entered
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Just fit one of these :- http://www.amperorassociates.co.uk/c-battery_chargers/BatteryC-3_18A.html

Switch it into float mode and it will sit there all day giving you 13.8v upto 18A.

Great for the price, I had to replace mine this week and this is amazing value for money compared to the rest out there.

It may even recover your battery if left as a 3 stage charger.



31/5/2012 at 7:25pm
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Quote: Originally posted by Tom,n,Gill on 31/5/2012
Dont want to fit another battery, just want to run the 12 volt side of a transformer.

The item I linked to is what you require. It is a 12v transformer/charger. It can be used with or without battery. To use without a battery installed, fix into your caravan, connect up to your mains ehu unit & connect 12v supply to 12v equipment in you caravan. You need to fit an inline fuse around 15amp on 12v output close to unit to prevent overload & the output of the unit is 12.5amps. Cheaper transformers will not have sufficient output for caravan use.


Post last edited on 31/05/2012 19:38:55


27/8/2014 at 3:23pm
 Location: Leeds
 Outfit: Pennine Fiesta trailer tent 2000
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Hi Tom

 

I have the same thoughts since my battery died.... did the transformer idea work



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H


27/8/2014 at 6:01pm
 Location: East Herts
 Outfit: 1992 Elddis Wisp 450CT + X Trail
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Personally I wouldn't like to rely on EHU alone, as they can often trip out when you least expect it, leaving you without lights or pump etc. But perhaps that's just me.

However, if you are sure you don't want a battery, I would go with mre15's suggestion. The more amps you have available the better, as you will get less voltage fluctuation if you use several things at once.

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Best Regards,
Colin


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27/8/2014 at 7:58pm
 Location: Dartford Kent
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A few years back I was doing something similar, and bought a power supply unit for CB radio homebase. It powered up a coolbox and lights fine.

I suspect the solutions above are more elegant!


27/8/2014 at 8:46pm
 Location: Midlands
 Outfit: Mondeo Avondale Gram
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I would always fit a battery. Even if its a small one.

It will even out any surges that may happen and give you backup if the mains trips out.




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