Hi,
I've been told the only options available to UK owners (for now) is the blue 230V/32A (IEC 60309) single-phase outlet or the red 400V/16A (IEC 60309) three-phase outlet... The High Power Wall Connector won't be available in the UK or Europe anytime soon.
That's what Tesla supply, but you've no obligation to use the Tesla-supplied kit. Indeed I would argue that for the UK, using the UMC that comes with the car as your daily charging option is hardly ever sensible (though of course it's a handy thing to have to hand for charging away from home) - see below.
My house has a three-phase supply from the street so I could go with either option.. although I believe they'll both charge at the same rate.
I don't believe they will charge at the same rate. Certainly 400V 3-phase 16A (which is equivalent to 3 separate 230V 16A single phase) is 11kW, while 32A single phase is 32*230 = 7.4kW
There is the issue that european Model S have currently got their charging rates reduced to 2/3 of what they should be, awaiting a modification to fix this - but hopefully the UK cars will already have this fixed.
I understand there may be a third option.. a type 2 from Chargemaster?
Free Homecharge Offer
Certainly for the vast majority of us with only single-phase available, the heavily-subsidised standard chargepoints from Chargemaster (and others offering similar deals) are a no-brainer. You aren't going to get anything faster on a single phase domestic supply, since the IET Code of Practice for Electric Vehicle Charging Equipment Installation says "In domestic premises, the demand from the electric vehicle charging equipment installation must not exceed 32A unless particular arrangements have been made with the electricity supplier", and in comparison with using the Tesla-supplied UMC with a 32A commando socket, this gives you a much neater installation - safer because it's more robust, more waterproof, and doesn't have wear from you unplugging the UMC to take away with you on trips - all for less than the cost of installing a commando socket in the first place. The one disadvantage compared to the UMC of not having a button to open the chargeport door can be solved by buying one of
these (admittedly, I don't yet have my car to give you a first-hand recommendation that they work).
However, since you are lucky enough to have 3-phase available, it would be a shame not to use it. One option is to use the Tesla UMC with a red commando socket, but this won't give you the benefit of your twin chargers. There are 3rd-party 3-phase EVSE available - here's one picked at random, not a recommendation:
http://www.ev-box.com/en/products/subproduct/wall-model/96-wall-model-push-button-b3321-0010
Probably worth having a word with some of the suppliers on the government scheme to see if they have a 3-phase option. Unfortunately, most of the devices on the approved list appear to be only single-phase.
See
https://www.gov.uk/government/publications/domestic-chargepoint-grant-accredited-list-of-chargepoints
Otherwise it's a matter of getting hold of a 3-phase EVSE (likely from mainland Europe where 3-phase is more common) and paying the install cost yourself.
Chargemaster are not too quick in responding, I filled out the form on their website a week ago still no contact, there are many other places you can get a free charging point from in the uK, however only the 16amp versions are free. Most charge an additional £95 to upgrade to 32amp
I found them very quick - phoned me back within 5 mins of filling the form on the website, and unit installed inside a week. Perhaps you need to give them a bell....