16 amp (around 3.5Kw) is the most you can plug into a wall socket, but I wouldn't advise it.
I would stick to around 10 amps, the reason being that wall sockets are rated for a short time at 16 amps, but you risk a fire if you do it longer. Your car probably comes with a charger rated about 10 amps.
I had a Feyree and it failed the first day, local guy took it apart and couldn't fix it. If you want 16 amps then ask your electrician to fit a blue industrial 16 amp socket and buy a charger with a 16 amp plug on it, but if your supply is adequate, might as well fit a 32 amp blue industrial socket and go for a 7.2kw charger with plug on it (cables/breaker etc to match, i.e. one size larger on the breaker)