Battery Charger

Mar 14, 2005
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Does leaving the battery on charge constantly do it any or no favours? I'm thinking of fitting a switch(with neon indicator) before the 240v input to my charger. I work away from home and therefore the van is 'switched on' 24/7. The main reason is being able to monitor the battery more closely/easier, the last one I had didn't seem to last long. And after a recent 'surge' it will be a little more protection when I'm not here. To be truthful I have already bought a slimline switch with neon.
 
Nov 6, 2005
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Caravans don't have battery chargers, they're power supplies - but universally called chargers! The difference is the voltage and the maximum charge that can be achieved.

Power supplies operate at 13.8v and will only charge the battery about 80%. They can be on permanently.

Proper chargers operate at 14.4 or 14.8v and will charge 100% but can only be left on permanently if they're "intelligent". Aldi were selling one recently for
 
Nov 6, 2005
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Gary, just fit a switch in the 230v cable into the power supply and use an intelligent charger, as I do - power supply for "peak" times and intelligent charger for the rest.

The power supply will provide 10/20 amps while an intelligent charger will give 4 amps, typically.
 
Jun 20, 2005
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Hi Roger

When we collected our Wyoming last november I was told that no "new" caravans come with a system that charges the caravan battery whilst connected to the towing vehicle.

I have studied the Bailey wiring diagram and this is true.

For years I have always had a split charger relay fitted, or I thought I had , to the tow vehicle.

Anyway it seems my battery does not get charged whilst towing, only the fridge works off the car.

Do you know if this situation can be changed or is it just progress???

Cheers

Alan
 
Nov 6, 2005
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Since the changes to 12S wiring in 1998, pin 2 is no longer used to directly charge the battery during towing.

My 2001 Bailey Pageant charges the battery from pin 4 Car Battery but using a relay from pin 6 Fridge - what this means is that pin 4 charges the van battery with engine running but supplies alternative power from the car battery with engine off or car disconnected.
 
Jun 20, 2005
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Roger

You must have rewired the feed then direct to the caravan battery to achieve this?

Before the Wyoming we had a Pageant Vendee and I stupidly assumed teh battery got charged, which I now appreciate is not the case.

Cheers

Alan
 
Nov 6, 2005
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Alan - I haven't rewired anything inside the caravan, that's how the 2001 Pageants and Senators were.

I have replaced the 12N/12S plugs with a 13-pin plug but retained all the pin allocations.
 
Jul 15, 2005
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Alan,

I'll add our experiences as support for Roger's statement - our previous Eriba charged the caravan battery via the car (admittedly our last two cars have had the 13 pin Euro connector, but the pin allocations do the same job as the 12S).

It was certainly possible to disable the car to caravan charge process by setting a switch on the BIP power pack...

And our current 2004/5 Eriba has a factory fitted Schaudt WA-1214 booster - which provides "intelligent" battery charging at 14.8 volts (boosted from the car 12 volt supply) whilst towing - and this receives its power from pins 9 and 13 (which I think are 3 and 4 on the 12S)

So I would have expected a caravan battery to be charged during towing (switch setting permitting)

Robert
 
Nov 28, 2007
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I bought an Aldi "intelligent". charger and it works well. From the picture of the CTEC charger (the gold standard of chargers) it looks Identical.
 
Jun 20, 2005
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Hi Roger,

I now have it on good authority from the powers that be that my leisure battery does get charged whilst the Wyoming is being towed.

Wait for it............one quarter of one amp per hour!!!!

At least some power is going there.

Cheers

Alan
 

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