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Subject Topic: 12v system Post Reply Post New Topic
16/10/2013 at 3:50pm
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Hi

This is for a trailer tent and I have posted in the correct forum aswell but i thought someone with a caravan might know!!

I have purhcased one of the leisure battery chargers from Lidl recently and I was wondering of it is possible to do a set up where the charger and leisure battery are connected the whole time we are away with the items we use on 12v (ie cool box, lighting etc) could be wired up on a switched box to be turned on and off at will all while the charger is still connected?

Many thanks for anyones help :-)


16/10/2013 at 4:07pm
 Location: Midlands
 Outfit: Mondeo Avondale Gram
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The charger is only 3amps.

The coolbox is likely to use more power than that on its own.
So the battery will die ot the charger will blow its fuse as you try to draw too much power from it.

You need something better. At least 8amps and double that if you want a reliable product.

If your on electric hookup then use a proper power supply designed for cool boxes.






16/10/2013 at 4:40pm
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What about just lights?


16/10/2013 at 5:05pm
 Location: Lichfield
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But if the Lidl charger is dependent on a 240 volt mains supply then what is the difference between using an independent charger in comparison to using the onboard charger that automatically charges your leisure battery? You need electric hook up either way. 


16/10/2013 at 5:40pm
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It's in a trailer tent - there us no inboard charger!

Just though, installing 12 v water system also so really would need for lights and running water!


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16/10/2013 at 8:58pm
 Location: Midlands
 Outfit: Mondeo Avondale Gram
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Will you be using a battery? If so what size?

What will you be running on 12 volts?

If you have mains hookup then 240v lighting maybe a better option.

You need a proper power supply for a coolbox though.

It may not like running on 14 to 18 volts from the battery charger.



17/10/2013 at 11:40pm
 Location: St ALBANS
 Outfit: Riva(Dandy) Destiny. Peugeot 5008
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The advantage of a 12volt lighting system is that it is safer and you are not dependant if you are careful for a day or two on EHU. 3 amps is not much but if you think about it your charger can be on all day and you only use lights for 5-6 hours at night so provided you don't use high ampage 12 volts such as a fridge you should be just about ok.
When the onboard charger on our camper packed up approx. 6 years ago I fitted a CETK XS7000 (7amp)intelligent charger in its place. (The original charger was rated at 20 amps!) The advantage of the new charger is that the battery is unlikely to sulphate and fail prematurely. I haven't fitted a new battery since.
Regards Bob.


18/10/2013 at 12:40am
 Location: Argyll Scotland
 Outfit: 1997 Bailey Ranger 470 4
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If you are using a TT, then you will be towing it with a car.

A car charges batteries, right?

So carry a spare battery in the boot of the car (strapped down ofcourse) and have an extra 12n plug with just the wires from the TT Charging circuit and the Negative circuit of that plug, into the boot of the car and connected to this spare battery. Then as you drive around, you will charge the spare battery, ready to change it over when the one in the TT gets low.

You could wire such a unit into the car, but the easiest way is to just plug it into the existing socket when needed and run the cable into the boot, carefully closing the boot lid so that you do not damage the cable.



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Lobey.


22/10/2013 at 10:55am
 Location: south cheshire
 Outfit: VW Caddy Maxi
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I have a leisure battery which just powers the 12v lights. I don't have a 12v water pump as they really take it out of the battery. I fitted a lever gravity fed pump instead... less to go wrong. The fridge works on gas when not on EHU.

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