@jonw @evolvable @jan @davidho
10amps is low and not typical for chargers.
Typical is closer to 30amps.

https://wepoweryourcar.com/how-many-amps-does-a-home-ev-charger-use/#:~:text=As%20such%2C%20a%207.4kW,a%20three%2Dpin%20plug%20charger.