Up to now the T2 charger has always charged at the c7kw when out and about. My son has fitted at work a 3 phase T2 charger which charges his Tesla at 11kw as it should but when i attach my Golf it only charges at c3kw. The car setting is set at max so i do not understand why it does not charge at the c7kw. Any ideas? Golf is 2018.