New build house EV charger

[George Smiley]

Our new home will be complete in a few months. Presently there is no connection to the mains, do I need to ask them anything such as keep it unlooped for an EV charger?

[jason61c]

George Smiley said:

Our new home will be complete in a few months. Presently there is no connection to the mains, do I need to ask them anything such as keep it unlooped for an EV charger?

what do you mean 'unlooped'?

[syl]

If it still needs connecting to the grid, I'd get 3 phase.

[theboss]

syl said:

If it still needs connecting to the grid, I'd get 3 phase.

Same

[jason61c]

will your standing charge go up?

No pun intended.

[George Smiley]

What benefits do I get going 3 phase?

[jason61c]

George Smiley said:

What benefits do I get going 3 phase?

faster charging. future proof.

What does 'unlooped' mean in your first post?

[George Smiley]

If the supply is looped it’s usually two or more houses in a ring

[RobDickinson]

George Smiley said:

What benefits do I get going 3 phase?

Single phase car charging is limited to 7kw or so, 3 phase is usually 11-22kw depending on the vehicle.

I think 3 phase makes it trickier for solar etc tho.

[rxe]

3 phase gives you more options if you want to "go large" with solar.

You can put a solar array on one phase (say the one that supplies the domestic load) or all three. As far as your house is concerned, it will be likely running off a single phase - your garage will have all three for machinery. A solar array on the house is just like any other installation.

[jason61c]

George Smiley said:

If the supply is looped it’s usually two or more houses in a ring

I've never heard of that before!

[chandrew]

RobDickinson said:

Single phase car charging is limited to 7kw or so, 3 phase is usually 11-22kw depending on the vehicle.

I think 3 phase makes it trickier for solar etc tho.

Here in Switzerland 3 phase is the standard to go into the house. It then is converted to the 'standard' 220V needed by most appliances. Hence you effectively have both options and it all depends where you connect things.

Very few EV owners seem to have wall boxes here as most think that 3 phase is sufficient.

[George Smiley]

as most devices are auto switching for power these days would I need to convert the 3 phase into 240v for the house?

Sounds a faff but I'll look into it

[Mr Pointy]

George Smiley said:

as most devices are auto switching for power these days would I need to convert the 3 phase into 240v for the house?

Sounds a faff but I'll look into it

No, Each phase is 240v line to neutral & 415v line to line.

[RobDickinson]

chandrew said:

Very few EV owners seem to have wall boxes here as most think that 3 phase is sufficient.

Sorry what does that mean

[George Smiley]

RobDickinson said:

chandrew said:

Very few EV owners seem to have wall boxes here as most think that 3 phase is sufficient.

Sorry what does that mean

As they have 3phase I assume a 32a commando at 12kw or some such

[RobDickinson]

ah fair enough!

[George Smiley]

RobDickinson said:

ah fair enough!

Could get away with it here on a single phase but I wouldn’t want to risk not having the grounding rods etc or the class b breaker

[jason61c]

George Smiley said:

Could get away with it here on a single phase but I wouldn’t want to risk not having the grounding rods etc or the class b breaker

What do you mean having the grounding rods or class b breaker?

An earth rod is a £20 bit of kit.

A B curve RCD is £40.

Neither of the above will give you the plus points a 3 phase supply will give you charging a EV?

[George Smiley]

jason61c said:

What do you mean having the grounding rods or class b breaker?

An earth rod is a £20 bit of kit.

A B curve RCD is £40.

Neither of the above will give you the plus points a 3 phase supply will give you charging a EV?

Nor would it be legal (within building regs)

I’m going to speak to the developer to ask the dno how much extra if any it would be to install 3 phase