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4434Morrison



Member Since: 02 Mar 2020
Location: Folkestone
Posts: 37

United Kingdom 2012 Range Rover Vogue SE TDV8 Santorini Black

Many thanks for everyone's knowledgeable input on the dual battery system that I installed.

At this stage I only need the second battery as a backup to the main battery. I will in due course upgrade the cable and the relay as advised.

I will certainly re-route the main vehicle harness over the top of the fuse box this weekend as a priority.

It should not be difficult to produce a second battery harness of the necessary quality based upon the comments received about this install. This issue clearly is that the kit I purchased (as I suspected when I received it) is not quite up to the job.

I have a relative who is an electrical engineer. I will speak to him over the next couple of weeks and ask him to design and fabricate a proper kit, taking into consideration the comments received here.

Thank you to everyone for your comments and input.

John 2012 4.4 TDV8 Vogue SE Current
2012 3.6 TDV8 Vogue (Current but driven by son now)

Post #554952 23rd May 2020 4:57am
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p38arover



Member Since: 16 Dec 2015
Location: Western Sydney
Posts: 1141

Australia 2004 Range Rover Vogue 4.4 V8 Adriatic Blue

I agree with Wayneg, the wiring is too light for an installation if one is expecting the battery to start the car. I'm not sure the original cable from the rear to the front is suitable, either. I believe it's rated at 50 amps.

I think this kit could have used black insulated cable for the negative wiring.

My system is not ideal but then it's not designed to start the car, only to provide power for my fridge and ancillaries when camped.

I have 2 x 45Ah AGM Deep Cycle batteries under the floor. I couldn't find a high capacity single AGM Deep Cycle to fit the space. I have a programmable dual battery controller linking the main and accessory batteries.

Wayneg, I'll look at moving the cable from the bottom to the top. I wasn't/am not happy with the original location. Thanks for the tip. I want to do some work in there to fit a wireless battery monitor (to monitor both charge/discharge) and to upgrade the cable (which are currently heavier than that kit's).

Oh, I have a battery isolating switch in my set up, too. Ron B. VK2OTC
2004 L322 V8 Auto
2007 Yamaha XJR1300
Previous: 1983, 1986 RRC; 1995, 1996 P38A; 1995 Disco1; 1984 V8 County 110; Series IIA

Post #554958 23rd May 2020 8:07am
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Brian Considine



Member Since: 15 Apr 2019
Location: Garlinge
Posts: 275

United Kingdom 

I would hope that the 2nd battery is securely fixed.
The additional wiring should be secured so that there is no mechanical strain on the connectors.
As others have said, some of the kit looks a bit optimistic regarding its capacity.
Maybe, it's more of a "leisure battery" than a "standby starting battery" kit ?

The first two points are MOT failures. 2003 Range Rover Vogue TD6

Post #554959 23rd May 2020 8:24am
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Alistair



Member Since: 11 Feb 2011
Location: Peterborough / Bordeaux / Andorra
Posts: 6749

United Kingdom 2013 Range Rover Vogue SE SDV8 Santorini Black

wayneg wrote:
The thin wires on the install in question would surely melt under starting load if the cranking battery was flat? I doubt very much that the relay from that kit is anything more than a standard 12v relay rated at 100a, it's just switched via ignition and not by voltage increase.
I think the best option for a proper VSR is the 2nd Red one explained in this video They are about A$50 25 quid. I have similar in my car.

https://www.youtube.com/watch?v=ew4zLC3ckm8


I agree that the wiring isn't up to allowing the second battery to start the car if the main battery is completely dead. However, if it's partially discharged, then it will help get it over the line.

That second VSR in the video does look like a better option - still provides the backup for when you need it, but you've consciously had to switch it on so you are at least aware that the main battery is struggling & can consider replacing it.

The difference between this install & most dual battery installs is that the second battery isn't used for anything independent, which is usually the main reason for having a relay to disconnect them - allowing the second battery to be used until its flat to protect the starting one - but that doesn't seem to be the case here.....

Post #554961 23rd May 2020 8:30am
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GraemeS



Member Since: 07 Mar 2015
Location: Wagga area
Posts: 1145

Australia 2012 Range Rover Autobiography TDV8 Bournville

The cable from the front battery to the rear in 2010-12 is much heavier than that of earlier models, supporting well over 200A of standard fused circuits in the rear fuse panel plus over 100A in the 3 large fuses.

Edit: The cable is 25 mm2 and is protected by a 250A fusible link.


Last edited by GraemeS on 24th May 2020 3:14am. Edited 1 time in total

Post #554963 23rd May 2020 8:36am
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p38arover



Member Since: 16 Dec 2015
Location: Western Sydney
Posts: 1141

Australia 2004 Range Rover Vogue 4.4 V8 Adriatic Blue

Ahh, thanks Graeme. Ron B. VK2OTC
2004 L322 V8 Auto
2007 Yamaha XJR1300
Previous: 1983, 1986 RRC; 1995, 1996 P38A; 1995 Disco1; 1984 V8 County 110; Series IIA

Post #554965 23rd May 2020 8:38am
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4434Morrison



Member Since: 02 Mar 2020
Location: Folkestone
Posts: 37

United Kingdom 2012 Range Rover Vogue SE TDV8 Santorini Black

@Wayneg,

Thanks for that link to the Australian product - wish I had done more research now before buying the kit from flea bay.

Based upon the advice received I will order that kit and re-install....

Once again, many thanks to everyone for your input Smile

John 2012 4.4 TDV8 Vogue SE Current
2012 3.6 TDV8 Vogue (Current but driven by son now)

Post #554974 23rd May 2020 9:56am
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Alistair



Member Since: 11 Feb 2011
Location: Peterborough / Bordeaux / Andorra
Posts: 6749

United Kingdom 2013 Range Rover Vogue SE SDV8 Santorini Black

IMHO you need to be clear what you're trying to achieve before spending more money.....

Did you just have a spare battery lying around looking for a use - or is there a specific problem you're trying to solve ?

VSR's are great, but assume there's a load on the secondary battery - which you don't have.

The switchable model seems to provide the best of all worlds - allows you to run a load of the second battery when the alternator is not running - protecting the main starter battery - but has the bonus feature for a condition when the main battery is drained AND the second battery is charged - it can then be switched to provide a boost.

If you just want a bit more oomph for starting, what you have should work OK - but why do you want it ? Is there a drain issue with your main battery whilst at rest ?

Post #554976 23rd May 2020 10:19am
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4434Morrison



Member Since: 02 Mar 2020
Location: Folkestone
Posts: 37

United Kingdom 2012 Range Rover Vogue SE TDV8 Santorini Black

@Alistair

My FFR has no electrical issues what so ever. As stated in my original post I did have a spare new battery purchased last winter for emergency backup. I therefore decided to install it as a second battery due to the car failing to start when I left the doors and tailgate open for about an hour, during the installation of the LED light set, to avoid that issue arising again.

Again as noted in my original post, I was disappointed in the quality of the wiring kit purchased on flea bay. The advice contained in this thread has led me to now embark upon and upgrade to a more professional second battery system, that will deliver additional peace of mind and functionality during my ownership of the FFRR.

I also want to ensure that, when I do eventually pass the FFRR on to my son, or alternatively to a third party, the car has the best possible second battery options installed.

I have always been a bit OCD with my cars and like everything to be done properly, whether the work is carried out by myself or others.

I will update this thread again when the upgrade is completed taking into consideration the valuable input received on this thread.

Many thanks to everyone for your constructive input.

John 2012 4.4 TDV8 Vogue SE Current
2012 3.6 TDV8 Vogue (Current but driven by son now)


Last edited by 4434Morrison on 25th May 2020 10:46am. Edited 1 time in total

Post #555198 25th May 2020 4:55am
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Ansi



Member Since: 07 Nov 2014
Location: Muenchwilen
Posts: 35

Switzerland 2010 Range Rover Autobiography 5.0 SC V8 Adriatic Blue

In my dual Battery system I use a 35mm2 cable from the main battery to the rear. Using the Traxide system made by Tim Sanderson. I need the second battery for my fridge and other toys. In the case of emergency starting I have a Marine switch in the rear compartment which I then switch to "ON". I would NOT trust the original wire, feeding the rear fuse panel, for starting.
BTW, if I have to work on the FF with open doors I always close the doorlatch so the light are turned off.

Post #555202 25th May 2020 7:15am
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4434Morrison



Member Since: 02 Mar 2020
Location: Folkestone
Posts: 37

United Kingdom 2012 Range Rover Vogue SE TDV8 Santorini Black

@Ansi,

Many thanks for the advice I am still reviewing options for an upgrade at this time and your comments are welcome Smile

The ideal is of course the ability to be able to connect additional equipment to the second battery without draining the primary battery. I am considering purchasing a caravan this autumn / winter for use next year. After viewing the Traxide videos the L322-DT90-C ( CARAVAN kit ) system at AUD 450.00 appears to be the ideal second battery system for the L322 offering the maximum benefit.

Useful tip about the door latches when working on the interior lights Smile

John 2012 4.4 TDV8 Vogue SE Current
2012 3.6 TDV8 Vogue (Current but driven by son now)

Post #555217 25th May 2020 9:22am
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Haylands



Member Since: 04 Mar 2014
Location: Brantingham, East Yorkshire
Posts: 5019

England 2012 Range Rover Autobiography 5.0 SC V8 Ipanema Sand

Just an aside, my 2003 and this current one turn off the interior lights after a short while if I leave a door open, as long as you don't keep open and shutting at least one door they stay off..! Pete

__________________________________________________
2012MY L322 Range Rover Autobiography 5.0 Supercharged Ipanema Sand, Jet Interior
2002 L322 Range Rover Vogue 4.4 V8 Epson Green, Ivory Interior (Fatty Offroader) Now Gone
-Project Fatty off roader-

Post #555220 25th May 2020 9:57am
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Weegie



Member Since: 09 Jun 2014
Location: S West France, PĂ©rigord Vert, Dordogne
Posts: 2430

France 2008 Range Rover Vogue TDV8 Stornoway Grey

You can also switch them off by pressing the on/off switch and, as you said, not opening and shutting doors. John
2008 Stornoway Grey 3.6 Tdv8 Vogue
2005 TD6 Java Black Vogue - Written off!!
GAP iiD BT
2003 Discovery TD5 Auto, Nanocom Evolution - gone to a new home!
MasseyFerguson 152 - No electronics!!

Post #555221 25th May 2020 10:00am
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GGDR



Member Since: 26 Nov 2016
Location: London
Posts: 2918

United Kingdom 2011 Range Rover Vogue SE TDV8 Stornoway Grey

On a 2010+ a long press on the overhead switch turns them from AUTO i.e. door operated to OFF

The interior lights can definitely drain an otherwise ok battery so one to watch. Or change to LED.
. Cheers, Greg
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
2011 Vogue SE 4.4 with lots of toys in Stornaway

Post #555230 25th May 2020 11:08am
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