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I have the same problem and Porsche Beverly Hills only tells me that I can not store the car for more then 2 months. I love my 911 2020 but on and off will be gone for 2 - 6 months. Still trying to find a solution how to charge the car while I'm gone.
Can you post a picture of how/where you wired the eyelet connectors.
Originally Posted by malibu515
There are just too many reports that the inside foot well port, stops offering charging for unknown reasons.
It is much more reliable to connect your trickle charger directly to the battery, and having a quick connect under the
frunk bonnett. For long term charging, you will have no issues, other than a power failure, in maintaining your
delicate and tempermental Lithium Battery. Permanently wired harness
Ideally, the negative terminal of the charger (as with jump-start) should be connected to chassis so you do not "bypass" the BMS integrated into the negative terminal connection. I do not believe you can do damage with a trickle charger but may damage the BMS if connecting a battery for jump start directly to battery terminals.
I've heard of electric cars having a BMS (battery management system) but does the 992 have a BMS and if so, why?
My dealer recommended against attaching the charger to the same negative post the battery uses. They recommended using a nearby bolt for the ground. I used this one and it works well. For jump starting, they recommend the same bolt on the other side of the engine. I think in fear of sparking so close to the battery. That post is too far for a trickle charger though.
This was EXTREMELY helpful; thank you very much! It was incredibly easy. I did manage to lose one of the retaining clips for the front of the panel that overlies the battery but my dealership is ordering one for me.
I apparently spoke too soon. After I hooked the CTEK Lithium US charger up last night, the lights on the unit indicated the car was charging normally. This morning the battery is DEAD. No clue what happened.
My dealer recommended against attaching the charger to the same negative post the battery uses. They recommended using a nearby bolt for the ground. I used this one and it works well. For jump starting, they recommend the same bolt on the other side of the engine. I think in fear of sparking so close to the battery. That post is too far for a trickle charger though.
I used this bolt instead for my Negative Ground. It fits the round connecter on the wire better.
The guy who came out to jump my dead battery told me that with a lithium battery, the negative terminal of the trickle charger should be connected to the battery itself and not just grounded to the chassis (and that is, in fact, how he connected the power supply to start the battery). I looked in the CTEK Lithium US instructions, which seems to indicate the same thing. Finally, I called a friend who's the service director of a Ferrari dealership. He told me that they use the CTEK Lithium US chargers on their cars and he agreed that the charger should be connected to the battery terminal.
I have a few Cteks on a couple cars and the porsche charge o-mat on my 992. None of them get hot, maybe a little warm but not above a mild warm...
I think it depends a bit on the level of discharge of the battery being charged. I once had too deeply “recover” a battery and it remained on Level 3 for several hours. The CTEK became hot to the touch, but nowhere “too hot”. In normal trickle charge operation, I agree, it is somewhat warm, but not hot.
The guy who came out to jump my dead battery told me that with a lithium battery, the negative terminal of the trickle charger should be connected to the battery itself and not just grounded to the chassis (and that is, in fact, how he connected the power supply to start the battery). I looked in the CTEK Lithium US instructions, which seems to indicate the same thing. Finally, I called a friend who's the service director of a Ferrari dealership. He told me that they use the CTEK Lithium US chargers on their cars and he agreed that the charger should be connected to the battery terminal.
