Charging caravan battery from the car

User avatar
WoodyZ
Supporter
Supporter
Posts: 3590
Joined: Mon Oct 06, 2008 6:23 am
NZMCA No: 33689
Location: Able to hit the road at last, from near Te Puke, Bay of Plenty
Contact:

Re: Charging caravan battery from the car

Postby WoodyZ » Thu Jan 21, 2010 9:20 am

I did neglect to address the matter of your plugs. What I have on is the 12 pin plug as per Chris' picture above. If that is enough pins for you it gives a nice tidy installation. It does not supply enough heavy duty terminals for my rig so I also have a 4 pin heavy duty round plug as well. My breaking system calls for the use of most of the 12 flat plug pins hence the need for another plug.

12 volt power is only supplied to the 5th wheeler while the engine is running.
Cheers, Neil

25ft 5th Wheeler Rebuild
WoodyZ Nest
NZMCA #33689

The most wasted of all days is one without laughter.
E E Cummings

User avatar
Troppo
Posts: 20
Joined: Fri Nov 06, 2009 6:38 pm
NZMCA No: 38783

Re: Charging caravan battery from the car

Postby Troppo » Tue Jan 26, 2010 7:16 am

Thanks for everyone's replies.
I have found a good website with detailed explanations and wiring diagrams, if anyone else is interested in doing the same thing, check it out.
http://www.fridge-and-solar.net/dual_bat.htm

Cheers,
Troppo.

User avatar
rawill
Posts: 979
Joined: Tue Feb 02, 2010 4:34 pm
NZMCA No: 16590
Location: Waimatuku

Re: Charging caravan battery from the car

Postby rawill » Sun Feb 07, 2010 6:18 am

Hi Troppo

Unless you have some kind of smart charging system in the caravan I think you will need more than a 12v feed from the battery.

I would suggest you talk to Peter West at West Electronics. His ABC system is great for what you want to do.
He sometimes advertises in the Motor Caravanner.
Robin and Averil 16590 - Crusin - 1989 Nissan Condor - 28 sq meters CSC - toad 010 Micra - (1978 Mitsi Canter which must go!~!)

User avatar
WoodyZ
Supporter
Supporter
Posts: 3590
Joined: Mon Oct 06, 2008 6:23 am
NZMCA No: 33689
Location: Able to hit the road at last, from near Te Puke, Bay of Plenty
Contact:

Re: Charging caravan battery from the car

Postby WoodyZ » Sun Feb 07, 2010 8:18 am

A couple of sparkies I have spoken to said that just a direct coupling is ok as the alternator takes care of the charging process.

I would agree that having a smart charger in the van would be a good idea, it will take better care of your batteries.

I have a Redarc BMS smart charger in my system. I wired up the plugs yesterday and temporarily connected the truck power wires to the charger and that is all working well for me while the engine is running.
Cheers, Neil

25ft 5th Wheeler Rebuild
WoodyZ Nest
NZMCA #33689

The most wasted of all days is one without laughter.
E E Cummings

User avatar
Nut17
Site Admin
Posts: 5824
Joined: Mon Jul 27, 2009 8:51 pm
NZMCA No: 15589
Location: Hastings
Contact:

Re: Charging caravan battery from the car

Postby Nut17 » Sun Feb 07, 2010 12:13 pm

Hi Troppo,

For a reasonably modest investment (A$249) I have fitted a Sidewinder 12v - 12v multi stage charger. This unit still requires a reasonable power supply from your tow vehicle but will operate from an input voltage as low as 8v. It has a maximum output of 30amps and is supported by a lot of positive industry comment. It is much cheaper than the Redarc equivalent.

The photo shows my installation.

For more info, go to: http://www.sidewinder.com.au/page168aa.html

Cheers Chris
You do not have the required permissions to view the files attached to this post.
Site Administrator admin@nzmotorhome.co.nz
Jayco Club New Zealand Member
2015 Jayco Silverline 25' 1200w Solar 600AH Lithium 250lt fresh/grey, 2KW Webasto diesel heater. 255lt Samsung inverter fridge
2015 Jeep GC Laredo Diesel 8 Speed + leather.

stuart
Posts: 2
Joined: Mon Jun 29, 2015 7:29 pm
NZMCA No: 0

Re: Charging caravan battery from the car

Postby stuart » Sun Oct 18, 2015 12:47 pm



Return to “Electrical”

Who is online

Users browsing this forum: No registered users and 4 guests