New 992 and use of 12V socket for charging

[bigporker]

Hi, I have just taken delivery of a new 992 Carrera and so far I am very pleased with the car, a huge difference from my old 997.2

I bought a Ctek MXS 5.0 to keep the AGM battery charged via the 12V socket in the passenger footwell. I found the workaround to keep the socket live after 20 minutes but for some reason it does not work on my car. Here is the procedure I am using:
Connect the charger to the socket
Turning on the ignition
Plug in the charger which lights up correctly
Turn off the ignition and lock the car

Any ideas what i am doing wrong?
Thanks
Ant

 

[Timrice]

Ant,

See this link for the procedure that I use (I am not sure whether what you do is exactly the same). It has been posted elsewhere in the 992 forum and it's a common problem []

http://www.911uk.com/viewtopic.php?p=1552308

Tim

 

[bigporker]

Thanks Tim,

That is one of the places where I read about the process and what I believe I am doing. Just doesn't seem to work for me.

Ant

 

[Timrice]

Sorry - I am sending you round in circles! I must admit to having had a problem a couple of times when I did it last week, so it may pay to be pedantic with following the procedure (which I thought I had been). Not helpful but would have helped me!

Tim

 

[Lancerlot]

Not sure if this is of any help, but with my MY2021 Macan and I am able to charge via the centre console power socket. The flashing green light has appeared only once.
I drive the car into the garage, turn off the ignition, plug the charger adapter into the socket, connect the mains plug into a 13amp power socket, then switch on. I've no idea if there is a central socket fitted in 992, but if there is that might be worth a try.

Regards,

Clive

 

[bigporker]

Thanks for the help. I am starting to wonder if something changed in the 2021 model year to stop it working. I have asked my OPC to get involved. I will update if they get back to me.
Ant

 

[val73]

I have a June 2019 992 4S with front axle lift and rear wheel steering so it has a lithium ion battery. I bought the Ctek Lithium XS battery charger and conditioner and plug it to the battery positive and the negative point on the driver’s side of the car, check the lights on the XS and close the bonnet, simples! Not sure why necessary to go through the 12v in the footwell with all the extra bits of kit unless not parked in a garage while charging. The Porsche charger is a Ctek but with the Porsche logo is more expensive!

 

[bigporker]

Thanks val73, the car is in a garage and I have just connected as you suggest and it works fine.

The reason for using the 12 V rather than connecting directly to the battery is that it involves removing the black plastic cover every time plus having to find somewhere to store the cover whilst being charged. It seemed much simpler to connect to the 12V.

 

[mikegibson]

As far as I understand, the footwell socket remains live (ie connected to battery) for 30 minutes after ignition is switched off.

The procedure for connecting a charger requires that the charger be plugged into the footwell socket and then the charger turned on at the mains within a couple of minutes of the ignition being turned off - definitely within 30 minutes. The presence of a voltage applied to the footwell socket stops the automatic disconnection after the 30 minute timeout.

If the car has been sitting for some time and you want to plug the charger in, you need to turn on the ignition and turn it off to activate the footwell socket. Having done so, connect the charger as described above.

If charging does not commence, you must reset things by turning off charger then turning ignition on/off and only then turning on charger again.

I have attached the bit from the Porsche charge-o-mat manual that describes this. There is nothing special about the charge-o-mat, it is a CTEK charger.

 

[mikegibson]

Hi, I have just taken delivery of a new 992 Carrera and so far I am very pleased with the car, a huge difference from my old 997.2

I bought a Ctek MXS 5.0 to keep the AGM battery charged via the 12V socket in the passenger footwell. I found the workaround to keep the socket live after 20 minutes but for some reason it does not work on my car. Here is the procedure I am using:
Connect the charger to the socket
Turning on the ignition
Plug in the charger which lights up correctly
Turn off the ignition and lock the car

Any ideas what i am doing wrong?
Thanks
Ant

I think you are going wrong in that you are plugging the powered charger in whilst ignition is on. Ignition must be off when charger powered on.

Turn off ignition
Plug charger into footwell socket within 30 minutes
Turn charger on at mains
Select charging mode (if not already in AGM charge mode)
Check that charging commences

If it stops after 30 mins need to reset. Turn off charger at wall. Leave 30 minutes. Turn ignition on/off and turn charger on again.

 

[cymro]

Thanks val73, the car is in a garage and I have just connected as you suggest and it works fine.

The reason for using the 12 V rather than connecting directly to the battery is that it involves removing the black plastic cover every time plus having to find somewhere to store the cover whilst being charged. It seemed much simpler to connect to the 12V.

No need to remove the cover every time. Make sure the crocodile clips are laying flat on the battery terminals and close the plastic lid. The short extension with the charging socket can be left in position permanently. Just need to connect the charger when needed.

 

[mikegibson]

Thanks val73, the car is in a garage and I have just connected as you suggest and it works fine.

The reason for using the 12 V rather than connecting directly to the battery is that it involves removing the black plastic cover every time plus having to find somewhere to store the cover whilst being charged. It seemed much simpler to connect to the 12V.

No need to remove the cover every time. Make sure the crocodile clips are laying flat on the battery terminals and close the plastic lid. The short extension with the charging socket can be left in position permanently. Just need to connect the charger when needed.

Note that according to Porsche manual the negative lead of charger should be attached to the earthing point not the negative terminal of battery. I haven't looked at battery connections so not sure why this is the case but that's what the manual states.

 

[bigporker]

Thank you to everyone for your replies and especially to Mike, you were correct, I was plugging it in whilst the ignition was on and then when I was trying alternatives I was not waiting 30 minutes.

I did as you suggested and it is now working from the 12V.

Thank you
Ant

 

[Schuey]

Thank you to everyone for your replies and especially to Mike, you were correct, I was plugging it in whilst the ignition was on and then when I was trying alternatives I was not waiting 30 minutes.

I did as you suggested and it is now working from the 12V.

Thank you
Ant

Sorry for the silly question, but when plugging into the 12v socket, what are you doing with the wire leading to the charging unit itself which is plugged into the mains? Are you running it from under the door or leaving a window open slightly?

For those connecting directly to the battery then I suppose that's an easy one as you just leave the frunk ajar slightly.

 

[mikegibson]

Thank you to everyone for your replies and especially to Mike, you were correct, I was plugging it in whilst the ignition was on and then when I was trying alternatives I was not waiting 30 minutes.

I did as you suggested and it is now working from the 12V.

Thank you
Ant

Sorry for the silly question, but when plugging into the 12v socket, what are you doing with the wire leading to the charging unit itself which is plugged into the mains? Are you running it from under the door or leaving a window open slightly?

For those connecting directly to the battery then I suppose that's an easy one as you just leave the frunk ajar slightly.

My car is parked and locked outdoors so my approach is:

Leave the charging unit inside the car and run its mains cable out from under the door. The charger lead is then plugged into an extension cable with an outdoor socket which I put under the car. The 5A mains cable on the CTEK is relatively thin and flat and I have not observed any issue/damage to lower door seals in doing this (also did this for many years on my 997). Need to make sure to avoid the brace piece that protrudes from mid/bottom of the door and goes into slot in inner door cill.

 

[Schuey]

Thank you to everyone for your replies and especially to Mike, you were correct, I was plugging it in whilst the ignition was on and then when I was trying alternatives I was not waiting 30 minutes.

I did as you suggested and it is now working from the 12V.

Thank you
Ant

Sorry for the silly question, but when plugging into the 12v socket, what are you doing with the wire leading to the charging unit itself which is plugged into the mains? Are you running it from under the door or leaving a window open slightly?

For those connecting directly to the battery then I suppose that's an easy one as you just leave the frunk ajar slightly.

My car is parked and locked outdoors so my approach is:

Leave the charging unit inside the car and run its mains cable out from under the door. The charger lead is then plugged into an extension cable with an outdoor socket which I put under the car. The 5A mains cable on the CTEK is relatively thin and flat and I have not observed any issue/damage to lower door seals in doing this (also did this for many years on my 997). Need to make sure to avoid the brace piece that protrudes from mid/bottom of the door and goes into slot in inner door cill.

Thanks for the explanation Mike, that makes sense. ????

 

[bigporker]

Schuey,

Just like Mike, I am doing the same but mine is indoors. I was going to run the cable out the passenger window but realised the lower door seal has enough flexibility not to damage the cable or hopefully the seal.

Ant

 

[Schuey]

Schuey,

Just like Mike, I am doing the same but mine is indoors. I was going to run the cable out the passenger window but realised the lower door seal has enough flexibility not to damage the cable or hopefully the seal.

Ant

Thanks Ant, this is good information and I will look to do the same then when my car arrives. ????

 

[findtom.com]

I wrote the post on 911UK, it took quite a few attempts to figure out the process. But it was for a Lithium battery, it is useful to know it works for AGM too.

Tom

 

[mikegibson]

I've attempted to consolidate the combined wisdom of all contributors under a post in 992 FAQ: https://www.porscheclubgb.com/forum/tm.aspx?m=1078332