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strang



Member Since: 16 May 2012
Location: Happy Valley
Posts: 1385
United Kingdom 2009 Defender 90 Puma 2.4 XS CSW Galway Green
'portable' spilt charging system
Is anyone familiar with any kind of 'portable' split charging system? What I am after is some kind of device that would plug into a fag lighter and charge a leisure battery whilst on the move, and which would be swappable between vehicles, depending on which one I use.

It may be that this is not possible anyway, but all suggestions welcome...... Euro-Leafing to infinity and beyond.....
Post #395721 4th Feb 2015 1:16pm
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Laurie



Member Since: 22 Feb 2008
Location: Sussex, England
Posts: 2897
England 2005 Defender 90 Td5 XS CSW Bonatti Grey
Oops! Double post. 

Last edited by Laurie on 4th Feb 2015 1:23pm. Edited 1 time in total
Post #395723 4th Feb 2015 1:20pm
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Laurie



Member Since: 22 Feb 2008
Location: Sussex, England
Posts: 2897
England 2005 Defender 90 Td5 XS CSW Bonatti Grey
You'd need something to limit the current to a level that the lighter socket fuse can handle.

Otherwise you would have a 'spilt' charging system

Admin note: this post has had its images recovered from a money grabbing photo hosting site and reinstated Mr. Green  
Post #395725 4th Feb 2015 1:22pm
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JWL



Member Since: 26 Oct 2011
Location: Hereford
Posts: 3443
England 2002 Defender 110 Td5 SW Coniston Green
What about putting a 12S socket close to where you will travel the said battery, you could fit one at the rear next to the tow hitch for future use and 'T' into the charging circuit and put a socket inside. That way you'll have all the advantages of only charging when the engine is running and you'll be future proofed for when you get older and feel you need a tin tent Laughing
Post #395732 4th Feb 2015 1:37pm
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JWL



Member Since: 26 Oct 2011
Location: Hereford
Posts: 3443
England 2002 Defender 110 Td5 SW Coniston Green
If you want something that is transferable then a set of crocadile clips with a fuse and the right plug for the lighter socket but as Laurie has said be carefull of the amps involved
Post #395733 4th Feb 2015 1:40pm
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Laurie



Member Since: 22 Feb 2008
Location: Sussex, England
Posts: 2897
England 2005 Defender 90 Td5 XS CSW Bonatti Grey
About 3 mtrs of thin (5 amp?) twin flex should lower the current suficiently.
Just monitor it's temperature when charging an 'empty' battery. 
Post #395736 4th Feb 2015 1:50pm
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JWL



Member Since: 26 Oct 2011
Location: Hereford
Posts: 3443
England 2002 Defender 110 Td5 SW Coniston Green
Coil it up nicely on top of the crash pad under the windscreen and you can use it to keep the windscreen demisted Laughing
Post #395737 4th Feb 2015 1:53pm
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JOE_130



Member Since: 26 Nov 2014
Location: Chelmsford
Posts: 105
United Kingdom 2015 Defender 130 Puma 2.2 HCPU Java Black
May be a little late posting but what you might need is a regulated DC-DC converter like this one...

http://www.es-store.co.uk/product_details....ow_menu=26

Its primary use would be to regulate the output voltage, but by doing so it can also limit its input current draw to something you could feasibly get from a cigarette lighter socket - just get one rated to less than ten amps or so. Won't be too bulky either. Hope that helps!!! Smile
Post #400318 19th Feb 2015 3:28pm
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Tiger



Member Since: 06 Jul 2012
Location: Wales
Posts: 2265
2004 Defender 110 Td5 CSW Java Black
I have one I made..

Can take a photo if you wish, works really well
Post #400320 19th Feb 2015 3:30pm
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captain slow



Member Since: 22 Jun 2011
Location: Herts
Posts: 356
United Kingdom 2014 Defender 110 Puma 2.2 CSW Corris Grey
I was also searching for this sort of thing to power the fridge on the way to and during camping trips, so any tips and pictures would be great. Thumbs Up thanks 2.2 Tdci 110 XS CSW Corris Grey
Prince Harry's D3 (gone but not forgotten)
300 Tdi 110 CSW (gone but not forgotten)
Post #400358 19th Feb 2015 6:23pm
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Tiger



Member Since: 06 Jul 2012
Location: Wales
Posts: 2265
2004 Defender 110 Td5 CSW Java Black

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Post #401341 23rd Feb 2015 8:04am
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Tiger



Member Since: 06 Jul 2012
Location: Wales
Posts: 2265
2004 Defender 110 Td5 CSW Java Black
In short.

Lesuire battery connected to a high current relay to control split charge.

Light on the box up signal charging

Voltage display (switched to avoid parasitic drain)

Discharge protector to avoid battery being drained. (Black box in middle)

Anderson on side (direct to battery)

CTEK connector on battery for top up

(Some shonkey wiring, could do with a proper multi fuse holder etc but works)
Post #401342 23rd Feb 2015 8:09am
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mikeh501



Member Since: 07 Jan 2013
Location: United Kingdom
Posts: 1142
United Kingdom 
pretty sure CTEK do a battery charger for DC-DC applications.

edit: maybe this one http://www.ctek.com/gb/en/chargers/D250S%20DUAL
Post #401394 23rd Feb 2015 1:53pm
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munch90



Member Since: 26 Oct 2013
Location: guildford
Posts: 3558
England 
the only thing I would say about putting the electrics in the lid

are risk of fumes when charging from the battery ( even if its sealed battery as they normally still have a regulated valve )
1, corrosive
2 explosion if they is a spark
Post #401398 23rd Feb 2015 2:05pm
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