If buying new, your Tesla Model S/X will charge at:I’m looking for advice on what are the best rates achievable from a 3 phase domestic supply, and what unit to attach it to?
I have a Model S on order, and curious whether to get the Tesla Wall Charger or a n other.
Cheers,IMO Tesla is best value and supports up to 22kW, but I think you can only purchase officially if you have a VIN. Shame if true as someone (like me!) might get a Zoe now but have a deposit down for a M3.
Not sure if OLEV grants covers >7kW and you need to get permission from DNO too. I noticed Chargemaster are expensive for 3 phase.
Have you got 3 phase or putting it in?
The manual is available at
Installation Manuals - Wall Connector
Cheers,If buying new, your Tesla Model S/X will charge at:
As a rough rule of thumb, 1kWh gives 3 miles of range, so those charge rates correspond to 22mph/50mph charging rate respectively - miles of range gained per hour of charging.
- 7.3kW from single phase 32A (the most common home charging setup)
- 16.6kW from three-phase 24A (max possible on current cars)
If buying used, you may get 11kW, 16.6kW or 22kW from three-phase depending on the age of the car and the options selected when it was bought.
For most people, 7kW overnight charging is perfectly adequate; however, if you already have a three-phase supply at home then the option for faster charging is a 'nice to have' for rare occasions such as when you arrive home from a day's driving and want to depart again that evening with a 'full tank'. Very few people could justify having a new 3-phase supply brought into the house just for the sake of the faster charging.
The Tesla WC is a nice unit and supports either single- or three-phase, whichever is available to connect it to. However, the charging rates are exactly the same as chargepoints from other vendors (though those typically have different models for single- vs three-phase).
Nice things about the Tesla WC compared to generic units are:
- Button on the connector to automatically unlock the chargeport on the car (otherwise you need to use the keyfob).
- Support for expansion to two or more WCs wired on the same circuit, sharing out the available mains power between them. It's unlikely that your domestic electrical supply has enough spare capacity for two chargepoints at full power, but connecting two WCs allows one car to charge at full speed if the other car is already full or not there, while allowing both cars to charge at half speed simultaneously for normal overnight charging.
- Aesthetics are arguably better for the Tesla unit than many others
- The Tesla unit is competitively priced for a unit with its features.
Note that even if there is already three-phase in the house, domestic setups often don't have three-phase switchgear (there may be separate consumer units for the three phases, feeding single phase loads), so it will be slightly more expensive to install three-phase than single-phase just in terms of the parts you need to connect in to the existing installation.
- The Tesla unit is not registered for the OLEV grant scheme, so you will have to pay all the costs of buying the unit and installation. Third party units can be had on the grant scheme which pays a contribution of up to £500 (though some of that gets eaten up in the costs of applying for the grant and the fact that you have to use a registered installer who may have to travel some distance).
- Unit is tethered with a Type2 plug. It will charge most non-Tesla vehicles, but not those with a Type1 connector (relevant if you get keen enough on EVs that you decide to buy a used Leaf as a 2nd car).
Bottom line: if money no object, definitely get the Tesla WC on three-phase. If penny-pinching, a third party single phase unit will get the job done. Up to you how you value the advantages (and the exact incremental costs will depend on your situation).
The limitation is in the newer cars rather than the WC. The WC can do 22kW (32A x 3-phase) if I bring my old S85 round to visit....I wasn’t sure what the max achievable was from home, whether it was limited to 16.5kw because of Tesla’s own WC.
You will certainly benefit from getting a 2 rate, peak/offpeak meter fitted, and if three phase is available, well seems silly not to have that enabled at the same time!The choice will depend on whether it’s better to:
-run 3 phase subject to a new meter. We have solar panels and the benefit of an analogue meter spinning backwards at times;
-asking for a different meter for night rate electric.