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notyalc
Member Since: 07 Mar 2020
Location: Northumberland
Posts: 75
  
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Trailered Movements wrote:The constant waking up during periods of being locked brings my battery down to a point where it might start, but for instance the FBH won't fire up.
2 weeks left alone and it won't start.
Yesterday I did a 400 mile journey, this morning the battery had 12 volts, so not sure it's the battery, I am going to 'bridge' the bonnet switch just in case, but was wondering if a simple pull of a fuse would let it (and me) 'sleep' peacefully.
Dave
You should have more than 12v after a 400 mile trip.
12.8 would be batter.
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 11th Nov 2020 8:54 pm |
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Trailered Movements
Member Since: 16 Jan 2020
Location: East/West Sussex Coast Borders
Posts: 1198
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That was after 18 hours of being parked up.
Dave 2011 Discovery 4 Commercial SDV6 (Gone)
2010 RRS TDV8 (Gone)
1980 OBLIC 4.0ltr Range Rover (went a long time ago)
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| 11th Nov 2020 9:00 pm |
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notyalc
Member Since: 07 Mar 2020
Location: Northumberland
Posts: 75
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Should still be more than 12
My car has stood since Sunday and is showing 12.2, and it was not fully charged when parked as the ss was not working if that helps.
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| 11th Nov 2020 9:15 pm |
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Hardware
Member Since: 28 Jun 2016
Location: Hiding under the M60
Posts: 12697
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Trailered Movements wrote:Looking at the Halfrauds solar charger, their top one and the lead for the OBD all in it's only £49.
£39.20 with Trade Card.
Go in store and tell them you've been laid off due to Covid and need to set up on your own and will be buying a load of tools as your employer wants all yours back and are b  ds . You'll get a Trade Card
Substitute "Carillion" for "Covid" then ask me how I know. 
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| 11th Nov 2020 9:35 pm |
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Trailered Movements
Member Since: 16 Jan 2020
Location: East/West Sussex Coast Borders
Posts: 1198
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So, no way forward with trying to keep the car asleep at night.
Measured battery this morning again, 12v, same as the previous day, but this time checked again after it had 'gone to sleep', and this had risen to 12.5v.
The current battery is a Bosch S3013, 720A & 90Ah, and as far as I can tell, is behaving as it should.
After a discussion with someone far better informed on batteries (my son), we have decided it's the constant waking up that's the problem, the battery is just not designed to deal with it.
So I have ordered a Bosch AGM S5A13, 850A & 95Ah, and we'll see how this goes.
As far as the solar trickle charge route, my son has seen the result of a very hot day where a charger cooked the battery, so have decided not to go down this route.
Will still try to find out what fuse/relay to pull to stop the initial 'problem', and will keep you informed if I get anywhere.
Dave 2011 Discovery 4 Commercial SDV6 (Gone)
2010 RRS TDV8 (Gone)
1980 OBLIC 4.0ltr Range Rover (went a long time ago)
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| 12th Nov 2020 10:12 pm |
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daimlermg
Member Since: 31 Jan 2010
Location: N Yorks
Posts: 140
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I leave my LR4 2010 with 67,000 on the clock and still with the original battery for 7 weeks at a time twice a year unused on the drive and it still starts when I want it again.
If I check the voltage now when its asleep is 12.5v to 12.7v depending on how it been use in the last few days
So you ought to get more than two weeks with yours.
It might be worth checking the battery drain thread here https://www.disco3.co.uk/forum/battery-dra...tery+drain[/u] Faultmate MSV-2
500,000 plus miles in RR,s and trying for more without breakdowns this time 
Gone Lexus RX400h SE
Past Audi A6 avant Qutro
Toyota Supra
Long line of RR's
Had for 40 years but now gone 1935 Daimler and 1937 MG
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| 13th Nov 2020 6:56 pm |
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Trailered Movements
Member Since: 16 Jan 2020
Location: East/West Sussex Coast Borders
Posts: 1198
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Yes that's the plan, my lad has very sensitive measuring equipment, so will see what we can find next week.
Dave 2011 Discovery 4 Commercial SDV6 (Gone)
2010 RRS TDV8 (Gone)
1980 OBLIC 4.0ltr Range Rover (went a long time ago)
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| 13th Nov 2020 7:46 pm |
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notyalc
Member Since: 07 Mar 2020
Location: Northumberland
Posts: 75
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There is a small plug next to the main battery. Normally just has some tape wrapped around it.
This is described as some kind of transport device used when the cars are in storage before delivery.
Does anyone know it’s function? Could it be used as some form of isolator?
It is clear that it is used for something like that before delivery.
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| 13th Nov 2020 7:51 pm |
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Trailered Movements
Member Since: 16 Jan 2020
Location: East/West Sussex Coast Borders
Posts: 1198
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Does anyone know when the car 'wakes' up at periodic times when locked, what it checks for, apparently it checks the status of the suspension, but what else?
Looking at isolating the relative functions with a 'box of tricks'.
Dave 2011 Discovery 4 Commercial SDV6 (Gone)
2010 RRS TDV8 (Gone)
1980 OBLIC 4.0ltr Range Rover (went a long time ago)
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| 14th Nov 2020 1:56 pm |
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Gareth
Site Moderator
Member Since: 07 Dec 2004
Location: Bramhall
Posts: 26699
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Park brake I think 🤔
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| 14th Nov 2020 2:40 pm |
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Trailered Movements
Member Since: 16 Jan 2020
Location: East/West Sussex Coast Borders
Posts: 1198
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An update on this.
The ability to stop the car waking up would be possible, as this function would have had to be written into the system in the first place. However, without knowing what has been written, turning it off if only by trial and error could be fatal.
There are numerous systems that have to be bypassed as it comes to life, for example the alarm, that then have to be put back in place, and without the knowledge from the ***** that devised it, could give many other issues.
Having a box of tricks to fool the car into doing what I want, although possible, could also throw up other problems.
Extensive tests proved that I do not have a drain when the car is asleep, and although the battery maintained a decent charge, it was not 100%.
It was a 2017 Silver Bosch and unfortunately had gone flat a couple of times in my year of ownership, so could have done so several more times before I got the car.
Did some tests and then fitted a Bosch AGM. As an example, switching the ignition on used 0.4 volts on the standard battery, but only 0.1 on the AGM. The AGM also was able to receive a larger charge from the alternator at all engine speeds/loads.
Conclusion was my original battery was not up to the job that the Discos systems required, however in a car without so many control modules, would perform adequately. It now lives in a 4 ton fork truck.
Generally those involved thought that fitting the AGM would solve my problem, only time will tell, but am at least happy in the knowledge that I shouldn't have any problems in the near future.
Dave 2011 Discovery 4 Commercial SDV6 (Gone)
2010 RRS TDV8 (Gone)
1980 OBLIC 4.0ltr Range Rover (went a long time ago)
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| 21st Nov 2020 1:21 pm |
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