Well, the battery build is here:
The ‘rather stupid impulse buy’ I refer to is a Volvo XC40 P8. It makes absolutely no economic sense, but it is a wonderful car to drive. And 5 years of completely hassle free driving is a definite plus.
(Charging from a wall plug before I installed the wallbox charger.)
Between the new battery and usual available storage on my old battery, I now have about 15kWh that I can charge the car daily for ‘free’ (* see above calculations).
The only real plus is that 80%+ of my driving is emissions free (I still need to use some Eskom after longer weekend drives (often 200km+ per day).