RE: Record charge time
I'm still unable to figure out what is going on with your car, Eep. The 'brick' limits current to 10A, so that should be 2.3kW. 8 hrs at 2.3 kW is 18kWh.
On the brick-lead, mine typically read* 10hr 30 mins on plug-in, and will tend to go up to 11 hrs before dropping back again quickly to 10hrs. I'd guess the charger is just 'testing the waters', so to speak, to see how the battery is taking on the charge.
(*'read', past tense, as in I have not done this since I first had the car when there was not a charge-point installed)
10hrs x 2.3kWh is 23kWh.
Do you not think this sounds suscpiciously like you might have a battery with a degraded capacity?