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T6.1 Leisure batteries not charging on EHU

Rololux

Rololux

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T6.1 Ocean 199 4Motion
I know there are various threads on similar topics, but I have not found any mention of this for a 6.1. My leisure batteries are not charging when on EHU, although they do charge when driving. The original symptom was that the parking heater would not start, even though the control panel indicated that there was >63hrs charge remaining. However, had red triangle indicator on the battery indicator, and only 1 or 2 bars shown, so batteries did appear to be low. Connected EHU, and heater functioned as normal. Initially, 9A charging was shown, but this quickly began to go down, and reached 0A in a couple of minutes. I then unplugged the EHU, and the charge remaining then started falling very fast, eventually settling down at 1hr20 mins! Reconnecting EHU after 30 mins or so and it showed 2A charging, again reducing to 0A in a few seconds.

Went for a short drive - just 10km or so, and when I returned charge remaining had risen to about 30 hrs, and 4 bars on battery indicator, so batteries are charging when driving.

I cannot be sure that charging on EHU has ever worked, as I've only had the van a few months, and hardly used it, due to the restrictions. I've never checked the charging rate, just noticed that the EHU charging light is always on when EHU connected. I have not actually driven it for about three weeks, so this may explain why batteries have drained a bit, but nothing has been connected and nothing turned on, so this would indicate that the batteries were pretty low to start with.

I'll be taking it in to the dealer when possible, but in the meantime, has anyone experienced anything similar, or can anyone suggest what is going on? The strange thing to me is that it did initially shown charge was getting to the batteries, so it's not as simple as a plug somewhere is disconnected.

Thanks in advance.
 
Loz

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Check the Breaker is closed.
Check the 230V socket by the sink is alive.
Check the power lead is firmly pushed into the onboard Charger
 
Rololux

Rololux

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Check the Breaker is closed.
Check the 230V socket by the sink is alive.
All checked. Note that the control panel light comes on showing hookup is active.
 
Loz

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All checked. Note that the control panel light comes on showing hookup is active.
Are you sure you are running on both batteries? (battery fuses on both batteries now on the 6.1)
Were the batteries allowed to discharge for a long period before you took delivery? (were they flat when yu got it?)
 
Rololux

Rololux

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Are you sure you are running on both batteries? (battery fuses on both batteries now on the 6.1)
Were the batteries allowed to discharge for a long period before you took delivery? (were they flat when yu got it?)
I have not checked any fuses, but the fact that when I first plugged in EHU, it did show 9A charging, indicates that there is not a fully open circuit somewhere.

As for the condition of the batteries, I cannot be sure, but the fact that they do charge when driving surely shows they are at least functional?
 
Loz

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I have not checked any fuses, but the fact that when I first plugged in EHU, it did show 9A charging, indicates that there is not a fully open circuit somewhere.

As for the condition of the batteries, I cannot be sure, but the fact that they do charge when driving surely shows they are at least functional?
1. Yes, but you might be only charging and discharging a single battery. The fuses are on the battery post in the rear and on the post fuse carrier in the front.

2. They may take a charge but not hold it once the charging supply is removed.
 
Loz

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Additionally, A T6F member was having similar issues and it turned out to be the battery terminal was loose.
 
Rololux

Rololux

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Thanks for your input - I'll have another poke around and check fuses and battery connections when it stops snowing!
 
Ray Jordan

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New Forest
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T6.1 Ocean 199 4Motion
I know there are various threads on similar topics, but I have not found any mention of this for a 6.1. My leisure batteries are not charging when on EHU, although they do charge when driving. The original symptom was that the parking heater would not start, even though the control panel indicated that there was >63hrs charge remaining. However, had red triangle indicator on the battery indicator, and only 1 or 2 bars shown, so batteries did appear to be low. Connected EHU, and heater functioned as normal. Initially, 9A charging was shown, but this quickly began to go down, and reached 0A in a couple of minutes. I then unplugged the EHU, and the charge remaining then started falling very fast, eventually settling down at 1hr20 mins! Reconnecting EHU after 30 mins or so and it showed 2A charging, again reducing to 0A in a few seconds.

Went for a short drive - just 10km or so, and when I returned charge remaining had risen to about 30 hrs, and 4 bars on battery indicator, so batteries are charging when driving.

I cannot be sure that charging on EHU has ever worked, as I've only had the van a few months, and hardly used it, due to the restrictions. I've never checked the charging rate, just noticed that the EHU charging light is always on when EHU connected. I have not actually driven it for about three weeks, so this may explain why batteries have drained a bit, but nothing has been connected and nothing turned on, so this would indicate that the batteries were pretty low to start with.

I'll be taking it in to the dealer when possible, but in the meantime, has anyone experienced anything similar, or can anyone suggest what is going on? The strange thing to me is that it did initially shown charge was getting to the batteries, so it's not as simple as a plug somewhere is disconnected.

Thanks in advance.
Hi Rololux
My Cali seems to have developed a similar sort of issue.
I have a Cali Ocean T6.1 MY21 which I picked up at the beginning of October 2020.

Everything seemed to be OK and the battery indicator always showed charging currents and capacity around 60Hrs etc. I ran the fridge and various electronic devices etc. I must admit that I have never seen all the blue bars on the overhead display lit 100% but just assumed a bit of inaccuracy really.
During my "testing phase" I had connected an external 240V supply and again everything functioned as expected.

After a month I had installed a 240V 16A 3 pin connection box in my driveway (exactly the same as most campsites) and I left the Cali connected to this supply for about 5 days just as you would on a week at a campsite (the overhead display showed >60hrs battery condition). I noticed after the 5 days to my surprise the battery condition had deteriorated to 10hrs which I thought was odd but considered that the Cali onboard charger may have a "maintain function" under no load and I had caught the discharge cycle. I didn't really pursue this as when driving the Cali >60hrs again was achieved.

(Because of Covid restrictions) I last drove my Cali on Jan 4th 2021 and decided to leave the Mains hook up connected again in the driveway.
The Cali would have been continuously connected on hook up for about 10 days (again this is quite a feasible time similar to say, at a campsite holiday.

I went to use the Cali and as soon as I put the ignition on there was a loud chiming noise and the overhead display froze (still displayed the mains connected indicator) and read "Battery empty. Charge now!" The dashboard also displayed "Second battery Low". Now I started to worry.
I disconnected the mains hook up and took the Cali for a long drive (time wise). The leisure batteries appeared not to charge during the drive either. As soon as the ignition was turned off, the overhead display reverted back to "Battery empty. Charge now!" again. :(
At this point, none of the internal camping lights worked (presumably to help conserve energy)

I decided to test the leisure batteries with a battery tester that I have used many times and had proven to be correct on other vehicle batteries in the past.
The images are attached:

Having set the parameters for AGM, AH etc, the battery under the passenger seat showed a SOC
(State of Charge) of 98% (voltage calculation) and a SOH (State of Health) of 100% (a more complex calculation based on Cold Cranking, Charge Acceptance and Reserve Capacity and a low internal resistance. So all in a GOOD BATTERY :)

Next was the battery in the hatch under the wardrobe.
This time the test showed a bad battery. SOH 3% SOC 98% and higher internal resistance. The tester considered that this battery should be replaced :(

This shouldn't be the case for a new battery of course but one theory could be the fact that this battery may have been hanging around discharged during the Covid delays I had with my Cali delivery.

So I have now decided to contact VW service and will let you know what happened.

Cheers.
 

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Rololux

Rololux

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T6.1 Ocean 199 4Motion
Thanks Ray - very detailed description and useful info. This is slightly different from my issue though, as my batteries do charge when driving. Sounds like a battery tester might be a good investment, but I'll concentrate my attention on the mains charger for now. Could be as simple as re-seating a connector - let's hope so.
 
WelshGas

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Hi Rololux
My Cali seems to have developed a similar sort of issue.
I have a Cali Ocean T6.1 MY21 which I picked up at the beginning of October 2020.

Everything seemed to be OK and the battery indicator always showed charging currents and capacity around 60Hrs etc. I ran the fridge and various electronic devices etc. I must admit that I have never seen all the blue bars on the overhead display lit 100% but just assumed a bit of inaccuracy really.
During my "testing phase" I had connected an external 240V supply and again everything functioned as expected.

After a month I had installed a 240V 16A 3 pin connection box in my driveway (exactly the same as most campsites) and I left the Cali connected to this supply for about 5 days just as you would on a week at a campsite (the overhead display showed >60hrs battery condition). I noticed after the 5 days to my surprise the battery condition had deteriorated to 10hrs which I thought was odd but considered that the Cali onboard charger may have a "maintain function" under no load and I had caught the discharge cycle. I didn't really pursue this as when driving the Cali >60hrs again was achieved.

(Because of Covid restrictions) I last drove my Cali on Jan 4th 2021 and decided to leave the Mains hook up connected again in the driveway.
The Cali would have been continuously connected on hook up for about 10 days (again this is quite a feasible time similar to say, at a campsite holiday.

I went to use the Cali and as soon as I put the ignition on there was a loud chiming noise and the overhead display froze (still displayed the mains connected indicator) and read "Battery empty. Charge now!" The dashboard also displayed "Second battery Low". Now I started to worry.
I disconnected the mains hook up and took the Cali for a long drive (time wise). The leisure batteries appeared not to charge during the drive either. As soon as the ignition was turned off, the overhead display reverted back to "Battery empty. Charge now!" again. :(
At this point, none of the internal camping lights worked (presumably to help conserve energy)

I decided to test the leisure batteries with a battery tester that I have used many times and had proven to be correct on other vehicle batteries in the past.
The images are attached:

Having set the parameters for AGM, AH etc, the battery under the passenger seat showed a SOC
(State of Charge) of 98% (voltage calculation) and a SOH (State of Health) of 100% (a more complex calculation based on Cold Cranking, Charge Acceptance and Reserve Capacity and a low internal resistance. So all in a GOOD BATTERY :)

Next was the battery in the hatch under the wardrobe.
This time the test showed a bad battery. SOH 3% SOC 98% and higher internal resistance. The tester considered that this battery should be replaced :(

This shouldn't be the case for a new battery of course but one theory could be the fact that this battery may have been hanging around discharged during the Covid delays I had with my Cali delivery.

So I have now decided to contact VW service and will let you know what happened.

Cheers.
Have you checked the Cube Fuse on the +tve pole of the rear Leisure Battery?
 
Ray Jordan

Ray Jordan

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New Forest
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T6.1 Ocean 199 4Motion
Have you checked the Cube Fuse on the +tve pole of the rear Leisure Battery?
Hi WelshGas,
Thanks.... I havent yet. I didnt have time today to do a bit more testing on fuses etc but hopefully tomorrow. Will also search for a circuit diagram for a T6.1.
Cheers
 
WelshGas

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There is also one on the front battery as well on a T6.1, but it's not a cube fuse but a more standard midi fuse.
I thought so, but the OP mentioned that it was the Rear Battery that was flat, not the passenger seat battery.
Is the charger output connected to the front or rear battery on the T6.1 or some other point?
 
Rololux

Rololux

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Luxembourg
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T6.1 Ocean 199 4Motion
So an update on this one. It went in to the dealer yesterday. They reported that they could not find any fault anywhere, and that they had successfully charged the leisure batteries on hookup. Indeed, the battery on the control panel now shows all 10bars (fully charged) and >60hrs remaining. They did say, however, that other people had reported similar problems and that they are expecting a software update at some point to address this.

My take is that probably the batteries are charging, but for some reason this is not being reflected on the control panel / system management system. I suspect they may have reset something to get the indicators correctly reflecting the true situation again.

I will await the software update. In the meantime, if I get the same behaviour again, I will try the old 'remove and replace fuses 5 to 8' trick!

Anyway, glad the batteries do not seem to have any issues for now. It would be interesting to hear if any other MY21 owners have seen anything similar.
 
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Ray Jordan

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Firstly.. sorry for the late reply @Rololux, Welshgas, Loz, Grumpygrandad etc, I have been "off grid" a bit with a work project and VW also could not look at my charging issue until last week.

Short Story:-
I picked up my Cali in October. Obviously not been able to use it as much as I would have liked due to COVID :(. I make a point of leaving the handbrake off (but in Park), driving it at least once a week etc and leaving the EHU connected most of the time. All those good things we do over winter!

I can never recall since I picked the Cali up, ever seeing all 10 blue bars on the battery display to be honest.

One day in the middle of January my console display showed "Battery Empty. Charge Now!"
No amount of EHU connection or long drives changed this warning which is accompanied with a loud beep and a shutdown of cabin power supplies!

So it looked like my leisure battery(s) had discharged completely.
I booked the Cali into VW for diagnostics and fix under warranty. They concluded that the 75A box fuse on the rear leisure battery had blown. This was replaced and after a EHU charge at VW, "viola" all 10 blue bars displayed :)
The cause of the blown fuse unfortunately is not known and is the bit that worries me of course.
Most plausible causes:
1) Fuse blown at battery fitment (e.g. spanner or terminal touching the chassis)
2) Rear battery feed cable has shorted to the chassis blowing the fuse. (VW reception guy said they would have tested for this)
3) Excessive current pulled on circuit somehow (unlikely)
4) Battery developed internal fault (unlikely)

My theory is that this fuse was blown during battery fitting at VW and the rear leisure battery since has slowly discharged itself to near exhaustion. (The timing feels right for this)
I really hope its not 2 or 3 (or even 4).... time will tell.

I will post a Longer more detailed story later:)
 
WelshGas

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Firstly.. sorry for the late reply @Rololux, Welshgas, Loz, Grumpygrandad etc, I have been "off grid" a bit with a work project and VW also could not look at my charging issue until last week.

Short Story:-
I picked up my Cali in October. Obviously not been able to use it as much as I would have liked due to COVID :(. I make a point of leaving the handbrake off (but in Park), driving it at least once a week etc and leaving the EHU connected most of the time. All those good things we do over winter!

I can never recall since I picked the Cali up, ever seeing all 10 blue bars on the battery display to be honest.

One day in the middle of January my console display showed "Battery Empty. Charge Now!"
No amount of EHU connection or long drives changed this warning which is accompanied with a loud beep and a shutdown of cabin power supplies!

So it looked like my leisure battery(s) had discharged completely.
I booked the Cali into VW for diagnostics and fix under warranty. They concluded that the 75A box fuse on the rear leisure battery had blown. This was replaced and after a EHU charge at VW, "viola" all 10 blue bars displayed :)
The cause of the blown fuse unfortunately is not known and is the bit that worries me of course.
Most plausible causes:
1) Fuse blown at battery fitment (e.g. spanner or terminal touching the chassis)
2) Rear battery feed cable has shorted to the chassis blowing the fuse. (VW reception guy said they would have tested for this)
3) Excessive current pulled on circuit somehow (unlikely)
4) Battery developed internal fault (unlikely)

My theory is that this fuse was blown during battery fitting at VW and the rear leisure battery since has slowly discharged itself to near exhaustion. (The timing feels right for this)
I really hope its not 2 or 3 (or even 4).... time will tell.

I will post a Longer more detailed story later:)
I wouldn’t worry too much. Those Cube Fuses aren‘t very robust and easily damaged by over tightening on installation. It’s not a very good circuit design as the Mains Charger is connected to the front Leisure Battery . At least on the T6.1 the Leisure Batteries are monitored individually and you get an indication, eventually, that the rear battery is disconnected.
I wouldn’t be a bit surprised if there are not an insignificant number of T5/6 SEs/Oceans around with that fuse blown and the owners totally unaware as they never camp without Mains EHU or wildcamp without EHU for more than 24hrs.
 
GrumpyGranddad

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I’ve noticed that my display for the last couple of days has shown >8 hours remaining even though ALL blue bars are lit. I’ve been driving the vehicle and not been using any power - lights/fridge/heater/etc, so was getting concerned that something was amiss. Had the van on EHU all day today and after unplugging it showed ALL blue bars and >9 hours which I felt wasn’t right!? I also have dual solar panels and today was quite sunny. The solar display showed a good charge rate too.

Just been out to check again and the camper display is now showing >59 hours.

Am I misinterpreting the display or is this a t6.1 quirk? Doesn’t inspire confidence in the accuracy of the display. Especially when wild camping.

1BAB4055-2E7E-4380-B02D-965EF95286EE.jpeg
 
RikFizz

RikFizz

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Derby
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T6.1 Coast 150
I’ve noticed that my display for the last couple of days has shown >8 hours remaining even though ALL blue bars are lit. I’ve been driving the vehicle and not been using any power - lights/fridge/heater/etc, so was getting concerned that something was amiss. Had the van on EHU all day today and after unplugging it showed ALL blue bars and >9 hours which I felt wasn’t right!? I also have dual solar panels and today was quite sunny. The solar display showed a good charge rate too.

Just been out to check again and the camper display is now showing >59 hours.

Am I misinterpreting the display or is this a t6.1 quirk? Doesn’t inspire confidence in the accuracy of the display. Especially when wild camping.

View attachment 74089

Hi GG. I think 'Quirky' might be a kind term. I've never yet had more than half of the blue bars lit and number of hours remaining oscillates between 60 and 8 quite regularly. I am now doing two things: firstly trying to stop fixating on the read out and relax. Secondly, focussing on the voltage which as other, more experienced folks have highlighted falls away when the van is first entered or the ignition first switched but generally returns to a more accurate reading after a period of time.
 

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