hybrid battery degradation

[AndyRBL]

Hello,

I did not pay attention to it in the past months, however, for the last two full charges of my Formentor, it only added 10.75 kWh. From what I know, the car has a 13kWh lithium-ion battery with a usable capacity of 12.8kWh and not 10.75 kWh. Both times the car started charging at 1% and the app notified me that it was full. Also the dashboard was showing 100%.
Another thing I've noticed is that I selected the "maintain battery charge" option in the settings, but in the 3KM I did after charging the battery went down to 95%. It did not maintain anything. Keep in mind that I ran only the petrol engine with no AC, the electric motor only being used at stop lights (from what I know if that setting is ON, it should ONLY run the petrol engine, even if it is not in motion, to charge the battery).

If we are indeed talking about an almost a 16% degradation in 14 months (~9500 KM - a cumulative of 4 months, the car was not used since it had issues from the factory and was serviced), that's not good at all.

Anyone else noticed / encountered this?

 

[Ninjakebab]

I have a theory that the current recall for the battery insulation material (or fuse or whatever it was) also resulted in a measure that shops has to decrease the battery capacity to protect it. I think I noticed mine going down a bit after getting a software update, after the recall anyway. So mine has had a capacity of 10 - 10.5 kWh for as long as I have had it.

About maintaining charge. This will not cause the engine to keep running even when standing still. You should allow +- 10% fluctuation from whatever goal you set it to maintain.

 

[AndyRBL]

I searched for old charging sessions and in august it charged for 3 hours, 10.8 kWh and it did not show 100%. It always took around 3 hours and 50 minutes for a full charge starting at 3.6-3.7 kWh. (I charge for free at work without an app so I don’t pay attention to these things or while i’m shopping so it never gets more than 30% while i do that)
Mine was not part of the recall. If it is indeed a software update that got released on every car, that’s not right. If that is the case, then it’s false advertising when it comes to full electric range.
When it comes to maintaining, it even says there that it will consume more petrol to keep the battery charged and I know for sure it did that when I first got the car.
I’ll make a call to the shop to see if they know anything about the battery issue

 

[dashnine]

I believe part of the 12.8KWh capacity is reserved for hybrid use when the battery is (apparently) at 0% capacity, there was a post about this a few months ago.

 

[AndyRBL]

I believe part of the 12.8KWh capacity is reserved for hybrid use when the battery is (apparently) at 0% capacity, there was a post about this a few months ago.

maybe so, but doesn't it still have to charge 12.8 kWh to that battery instead of 10.7? I did not find any official data on this one. One website says that the net capacity is actually 10.4 kW and others say that it is 12.8.
I know that in the past I've charged more than 10.7 kW. Asked the official dealer and service and they don't know.. very reassuring.