Member Since: 12 Dec 2005
Location: The Gaff
Posts: 50944
Using the Stop \ Start battery to power an Engel ?
Thoughts on the feasibility technos?21 year LR veteran > D2 GS 2003 > D3 S 2006 > D3 HSE 2009 > D4 HSE 2013 > D4 HSE 2015 > D5 HSE 2018 > DS HSE R-Dynamic P300e 2021
1st Aug 2015 8:28 pm
Gareth Site Moderator
Member Since: 07 Dec 2004
Location: Bramhall
Posts: 26705
If its the same as the Jag battery, it won't last long!
1st Aug 2015 8:35 pm
DG Site Moderator
Member Since: 12 Dec 2005
Location: The Gaff
Posts: 50944
can't seem to track down the amp hours on it ...40 would give roughly 12 hours which should be enough in most cases. I think it might throw up some DTCs though 21 year LR veteran > D2 GS 2003 > D3 S 2006 > D3 HSE 2009 > D4 HSE 2013 > D4 HSE 2015 > D5 HSE 2018 > DS HSE R-Dynamic P300e 2021
1st Aug 2015 8:55 pm
Bodsy Site Sponsor
Member Since: 06 Nov 2006
Location: In the Clubhouse
Posts: 21361
The yellow top is only 45ah, so I don't think the stop start is that big. More like 20ah?Bodsys Brake Bible
What is an Engel?Volvo XC60 - does all that the D4 should have done
Discovery HSE MY16 (good apart from the heating), now sold
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1st Aug 2015 9:40 pm
DSL Keeper of the wheelie bin
Member Since: 11 May 2006
Location: Off again! :-)
Posts: 72798
Fridge.
1st Aug 2015 9:42 pm
drivesafe
Member Since: 23 Feb 2006
Location: Gold Coast, Australia
Posts: 867
Hi DG, like others, I have not yet seen the specs for the STOP/START battery but it is quite small.
So if you managed to flatten it, besides the potential of damaging this battery, you will probably have all manor of errors/problems caused the first time you drive after flattening the battery.
It would be far safer to run your fridge off the cranking battery, and even if you do manage to flatten it, it’s a simple matter of a jump start and no harm done.
Your fridge will not only run for much longer, but you can safely discharge your cranking battery down to 30% ( 11.75v ) and still be able to start your motor.2008 TDV8 RR Lux + 2009 D4 2.7
1st Aug 2015 10:14 pm
DG Site Moderator
Member Since: 12 Dec 2005
Location: The Gaff
Posts: 50944
Thanks Tim ..I still have one of your kits ..but I don't fancy running with the yellowtop in the boot unless it's an "easy" task. 21 year LR veteran > D2 GS 2003 > D3 S 2006 > D3 HSE 2009 > D4 HSE 2013 > D4 HSE 2015 > D5 HSE 2018 > DS HSE R-Dynamic P300e 2021
1st Aug 2015 10:23 pm
drivesafe
Member Since: 23 Feb 2006
Location: Gold Coast, Australia
Posts: 867
Hi DG, it can easily be done.
Either post up or PM me which kit you have and I can let you know the simplest setup for what you want to achieve.
BTW, so many D3 and D4 owner just want to run a fridge without going though all the work to fit a second battery that I am seriously considering producing a D3/D4 specific version of my Low Voltage Cut-Out unit, the ABG-25, in a Plug-N-Play version to replace the relay in the fuse box and would protect your cranking battery against being over discharged.
DG, would this be of more interest to you?2008 TDV8 RR Lux + 2009 D4 2.7
^^Tim I would be interested on one. Defender 300Tdi 110 HCP - Keswick Green
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2nd Aug 2015 7:21 am
DSL Keeper of the wheelie bin
Member Since: 11 May 2006
Location: Off again! :-)
Posts: 72798
Sounds an excellent idea.
2nd Aug 2015 8:14 am
Gareth Site Moderator
Member Since: 07 Dec 2004
Location: Bramhall
Posts: 26705
That sounds like a good idea I'd buy one...
2nd Aug 2015 9:36 am
DG Site Moderator
Member Since: 12 Dec 2005
Location: The Gaff
Posts: 50944
Tim I have an SC40-LR which has done well for me on D3's and my last D4 where you could squeeze a yellowtop in by re-jigging some of the modules in the 2nd battery box ...but obviously now there's not a chance of fitting it under the bonnet.
Sounds as though your new solution would suit my needs better though so yes i would be interested.21 year LR veteran > D2 GS 2003 > D3 S 2006 > D3 HSE 2009 > D4 HSE 2013 > D4 HSE 2015 > D5 HSE 2018 > DS HSE R-Dynamic P300e 2021
2nd Aug 2015 9:58 am
drivesafe
Member Since: 23 Feb 2006
Location: Gold Coast, Australia
Posts: 867
Hi DG, if you still have but are not using your SC40, that can be very easily modified to do the same thing.
It is already set to cut out at 12.0v so just fit some male spade connectors on the thick wires and find a good earth for the thin wire.
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