I am a UK owner of a late Roadster. I have just acquired a HPWC (second hand) which came from the US. Will this work in the UK - i.e. are there any differences in the UK and US specifications of these devices? Secondly, are there any issues to be aware of on installation? I realise it's a 70A device and will need appropriate RCB etc; are there any jumpers or links to change inside the charger?