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My split charge system
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Ben4
 


Member Since: 28 Apr 2017
Location: Buckinghamshire
Posts: 934

United Kingdom 2016 Discovery 4 3.0 SDV6 Landmark LE Auto Santorini BlackDiscovery 4

Instead of or as well as the main battery earth terminal?
 formerly Disco3Ben

2016 D4, Santorini Black
2007 D3, Black - sold 
 
Post #19989158th Nov 2018 7:35 pm
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DSL
Keeper of the wheelie bin 


Member Since: 11 May 2006
Location: Off again! :-)
Posts: 72740

Ukraine 

Instead of. Thumbs Up
   
Post #19989178th Nov 2018 7:38 pm
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Ben4
 


Member Since: 28 Apr 2017
Location: Buckinghamshire
Posts: 934

United Kingdom 2016 Discovery 4 3.0 SDV6 Landmark LE Auto Santorini BlackDiscovery 4

Thanks - I'll fit it in the morning.
I did wonder why I had to make a longer bolt for the main battery earth and I hadn't read anywhere else about other people doing it!!
 formerly Disco3Ben

2016 D4, Santorini Black
2007 D3, Black - sold 
 
Post #19989208th Nov 2018 8:09 pm
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Ben4
 


Member Since: 28 Apr 2017
Location: Buckinghamshire
Posts: 934

United Kingdom 2016 Discovery 4 3.0 SDV6 Landmark LE Auto Santorini BlackDiscovery 4

Iceman08 wrote:

On the back I fitted a fuse box screwed to the ply and set about wiring it all up.
Click image to enlarge


did you end up putting in 4 fuses of the same size? as apposed to the 10,15,20,25 that comes already in it?
Just done mine and at the moment it's fitted with the ones it came with

thanks Ben
 formerly Disco3Ben

2016 D4, Santorini Black
2007 D3, Black - sold 
 
Post #20505743rd May 2019 4:26 pm
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tayaste
 


Member Since: 15 May 2013
Location: Chester
Posts: 7633

United Kingdom 2008 Discovery 3 TDV6 HSE Auto Stornoway GreyDiscovery 3

It depends on the grade of wiring used.

You want to make sure the fuse blows before your wires.
   
Post #20896354th Oct 2019 9:24 pm
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ty-george
 


Member Since: 08 Jan 2018
Location: Derbyshire
Posts: 82

United Kingdom 2015 Discovery 4 3.0 SDV6 SE Tech Auto Santorini BlackDiscovery 4

Has anyone tried removing the fuse for the standard 12v sockets and powering them from their second battery? Id like power in the front to power the dash cam and charge stuff up over night.
 Good bye untrusted p38
Hello 15my Disco 4
Not forgotten you disco2! 
 
Post #20978796th Nov 2019 7:48 am
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Ben4
 


Member Since: 28 Apr 2017
Location: Buckinghamshire
Posts: 934

United Kingdom 2016 Discovery 4 3.0 SDV6 Landmark LE Auto Santorini BlackDiscovery 4

I bought a decent yellow top battery as my second bat for the split charge system.
I’ve been running a small dehumidifier in the car overnight after my sunroof drain issues.

Now I can’t get the battery to charge higher than 8v with a trickle charger and it’s sat at about 6.5v.

could I have killed the battery by running it down low?
It won’t top up when I link the batteries.
 formerly Disco3Ben

2016 D4, Santorini Black
2007 D3, Black - sold 
 
Post #20980416th Nov 2019 10:15 pm
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ty-george
 


Member Since: 08 Jan 2018
Location: Derbyshire
Posts: 82

United Kingdom 2015 Discovery 4 3.0 SDV6 SE Tech Auto Santorini BlackDiscovery 4

Yea thats dead. You need something to stop it going below 12v or whatever level the manufacturer recommends.
 Good bye untrusted p38
Hello 15my Disco 4
Not forgotten you disco2! 
 
Post #20980637th Nov 2019 6:41 am
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Ben4
 


Member Since: 28 Apr 2017
Location: Buckinghamshire
Posts: 934

United Kingdom 2016 Discovery 4 3.0 SDV6 Landmark LE Auto Santorini BlackDiscovery 4

If I have killed it, what kind of battery do I need to replace it with?

I have the charge points in the rear of the car so I can charge equipment when out on location, so the battery is going to get lower.

How do I not kill the next battery? I haven't heard of others with similar issues with their split charge systems.

Or have I just run this one too low on this occasion? I thought the yellow top was the 'go to' of choice for this kind of install?
 formerly Disco3Ben

2016 D4, Santorini Black
2007 D3, Black - sold 
 
Post #20980937th Nov 2019 9:55 am
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James W
 


Member Since: 27 Mar 2008
Location: Wirral, UK
Posts: 3056

United Kingdom 

Although the T-Max kit is a great value split charger it doesn't have over-discharge protection like some expensive management solutions. You can however add in another bit of kit if you think you will be leaving items 'unattended' that could discharge the aux battery without you intervening.

Google "12v Battery Guard" and have a look for something with suitable Amps rating to shut off your draw if the Aux gets dangerously low.

I don't have one on mine as the only thing I would use in reality that would do this is my Waeco fridge which has its own voltage protection built-in.
 D4 XS, gone, much loved, never forgotten
2018 FFRR SDV8 Autobiography - WTF does this button do 
 
Post #20980977th Nov 2019 10:39 am
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Ben4
 


Member Since: 28 Apr 2017
Location: Buckinghamshire
Posts: 934

United Kingdom 2016 Discovery 4 3.0 SDV6 Landmark LE Auto Santorini BlackDiscovery 4

Thanks for the suggestion.

I've had a look and found these:
https://www.12voltplanet.co.uk/bg10-batter...v-24v.html

First step is to get a new battery to replace the fecked one!
 formerly Disco3Ben

2016 D4, Santorini Black
2007 D3, Black - sold 
 
Post #20981207th Nov 2019 1:23 pm
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James W
 


Member Since: 27 Mar 2008
Location: Wirral, UK
Posts: 3056

United Kingdom 

Yep, cool - that particular one will handle gear pulling a max of 120 watts so make sure you check what you're running off it
 D4 XS, gone, much loved, never forgotten
2018 FFRR SDV8 Autobiography - WTF does this button do 
 
Post #20981357th Nov 2019 2:03 pm
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