T6.1 High Vehicle Battery Discharge Rate

[Pembrae]

I am looking for some advice on how to diagnose the problem with a high vehicle battery discharge.

Following great advice I received in my previous post, Vehicle Battery Discharging, I fitting an Ancel BM200 Battery Monitor. The screenshot below shows the battery voltage since I installed the battery monitor.

• After installing the battery monitor I charged the battery to 100%.
• Over the next couple of days the battery gradually dropped to 76% without anything happening to the vehicle
• At around 12:30pm on the 19th May the battery dropped quickly from 76% to 49%. This was when the vehicle was unlocked and doors left open for about 15 minutes.
• Vehicle then used and battery charged to 61% with it then dropping to 56% over the next 18 hours

I am assuming the level of discharge I am seeing for a vehicle which is just sitting on the drive is not correct. Assuming this is the case, does anyone have any advice on how I go about isolating what could be causing the high drain? Is there anything I should be aware of when testing the parasitic drain on a T6.1 video, I was planning on following guidance in How To Test Parasitic Draw on a Car Battery?

Help greatly appreciated.

 

[StratosFearXX]

Looks fairly similar to mine ('24 plate 6.1) though I have very little trust in the Ancel SOC calculation/reading.

Parasitic draw measuring method looks fine, think mines 4 milliamps or so which should be fine.

 

[StratosFearXX]

P.S. Also got a tracker on mine so that'll be using a bit.

 

[Jacksonhitt]

Ha. Just logged in to ask something almost identical.

I struggled to find the parasitic draw but an AA chap came and said it was 2.2amps (high). When he disconnected the battery it was 0.3 amps.

I’m actually after recommendations for electrical specialist

Solution could be fitting a kill switch to disconnect battery but it would be good to solve the root cause.

I’d also like to run the stereo from the leisure battery (for when parked up).

Anyone recommend someone?

Ideally near to Brighton.

Many thanks
Jackson

 

[Dellmassive]

I am looking for some advice on how to diagnose the problem with a high vehicle battery discharge.

Following great advice I received in my previous post, Vehicle Battery Discharging, I fitting an Ancel BM200 Battery Monitor. The screenshot below shows the battery voltage since I installed the battery monitor.

View attachment 326690

• After installing the battery monitor I charged the battery to 100%.
• Over the next couple of days the battery gradually dropped to 76% without anything happening to the vehicle
• At around 12:30pm on the 19th May the battery dropped quickly from 76% to 49%. This was when the vehicle was unlocked and doors left open for about 15 minutes.
• Vehicle then used and battery charged to 61% with it then dropping to 56% over the next 18 hours

I am assuming the level of discharge I am seeing for a vehicle which is just sitting on the drive is not correct. Assuming this is the case, does anyone have any advice on how I go about isolating what could be causing the high drain? Is there anything I should be aware of when testing the parasitic drain on a T6.1 video, I was planning on following guidance in How To Test Parasitic Draw on a Car Battery?

Help greatly appreciated.

Regroft that clock but instead of the sic plot the actual voltage. ..

It will be more useful to see the drop in voltage over time.

This is normally caused by third party editions like dash cameras, tracker, extra alarm system, USB chargers, LED lights, etc etc

 

[StratosFearXX]

Regroft that clock but instead of the sic plot the actual voltage. ..

It will be more useful to see the drop in voltage over time.

This is normally caused by third party editions like dash cameras, tracker, extra alarm system, USB chargers, LED lights, etc etc

Pls edit

 

[Dellmassive]

Please re

Pls edit

Please re graph
that plot... but instead of the SOC, plot the actual voltage. ..

It will be more useful to see the drop in voltage is, over time.

This drop is normally caused by third party editions like dash cameras, tracker, extra alarm system, USB chargers, LED lights, etc etc

First thing it to charge the battery is the van for 24-48hrs to make sure it's definitely fully charged.

A knackered battery, also shows these symptoms.

 

[Pembrae]

Here's the voltage graphs as requested.

 

[Dellmassive]

Just pulled mine off the van as a reference...

I have a able mail amt12/2 starter trickle charger, set to keep the starter at 12.2v

.

 

[Dellmassive]

Here's the voltage graphs as requested.View attachment 326747View attachment 326748

You're voltage is starting above 12.0v sou you are good for now.

You need longer time, re post when you have 7 and 15 day plots.

 

[Dellmassive]

Here is a 7 and 1 day reference.

 

[Pembrae]

Here's the voltage graphs over a longer period as requested. The first one shows the voltage dropping over a five day period without the ban being used.
The second graph includes the van going for a short drive and then being put back on charge due to low battery voltage warnings.
Unfortunately not had time to test the parasitic current draw yet.
Any comments appreciated.

 

[StratosFearXX]

Looks normal to me (comparing to my own van).