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I don't think you've got a lemon. I have observed the same effect on mine when using the departure time and off-peak charging (why these 2 are connected, I still don't entirely understand, by the way).I have noticed that with a departure time of 8:15am, if I check SOC at 7am, the car is at 100% and stopped charging. However, 45 mins later the car is back at 96% and charging. My guess is that this is connected to the battery precon, which changes battery temperature and affects the SOC and makes it drop. Ambient temperature might also be a factor. This then in turn makes the charging mode to come on again. I have raised this with my BMW I dealership and they told me that one other owner has reported the same. I was told that this was raised with BMW Germany.On multiple occasions I also had the effect that -despite departure time and off-peak enabled- the car would start charging immediately and outside the off-peak window when I plug it in the night before. However, I think this only happens if the SOC is particularly low and is there by design to protect the batteries. In other words, it won't wait until off-peak and just goes ahead and starts charging. At about 17 or 18%, it will turn off and then wait for the off-peak window to complete the charge.Thankfully, this is documented nowhere! (hang on!)
I don't think you've got a lemon. I have observed the same effect on mine when using the departure time and off-peak charging (why these 2 are connected, I still don't entirely understand, by the way).
I have noticed that with a departure time of 8:15am, if I check SOC at 7am, the car is at 100% and stopped charging. However, 45 mins later the car is back at 96% and charging. My guess is that this is connected to the battery precon, which changes battery temperature and affects the SOC and makes it drop. Ambient temperature might also be a factor. This then in turn makes the charging mode to come on again. I have raised this with my BMW I dealership and they told me that one other owner has reported the same. I was told that this was raised with BMW Germany.
On multiple occasions I also had the effect that -despite departure time and off-peak enabled- the car would start charging immediately and outside the off-peak window when I plug it in the night before. However, I think this only happens if the SOC is particularly low and is there by design to protect the batteries. In other words, it won't wait until off-peak and just goes ahead and starts charging. At about 17 or 18%, it will turn off and then wait for the off-peak window to complete the charge.
Thankfully, this is documented nowhere! (hang on!)
