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[Sir Tigger KC]

If we banned farm machinery to cut down on emissions, all those villagers could go and work the land like they did in the olden days. 

[Doctor Gollum]

Just a shame that they've built housing on all those fields 

[Sir Tigger KC]

That's just nit picking.   

[Raeturbo]

Stopping wars would be a very good thing for the planet…….   Any thoughts on that bombshell😭

[LC0112G]

Maths was based on the following...

(square root of 3)1.73 x 32A x 240V = 13,286.4Wh or 13.29kWh

So to charge 93kW would take 7 hours.

22kWh would require a current of 53A which is somewhat optimistic for a domestic supply, even three phase.

Why root 3? The correction you're applying is already accounted for in the 240V RMS calculation of voltage.

Most normal houses only have single phase, and the supply is typically fused at 60A. Flats can be 30A, but if you're living in a flat on the 12th floor of Nelson Mandela house then charging an EV is going to be problematic anyway. You can ask for the 30A/60A to be upgraded to 80A or 100A on a single phase.

A 22Kw wall charger does require 3 phase. Again you can ask to be upgraded. I suspect the local distribution grid is going to struggle though if/when every house in a street wants it.

[Doctor Gollum]

From here, granted we're not talking about a motor, but draw is draw.

The 32A was the suggested current for domestic 3 phase in the UK.

If greater is available, have at it, but the cost of charging at those rates isn't going to improve.

[LC0112G]

From here, granted we're not talking about a motor, but draw is draw.

The 32A was the suggested current for domestic 3 phase in the UK.

If greater is available, have at it, but the cost of charging at those rates isn't going to improve.

30A @ 240V is 7.2Kw. Would've thought that a bit low for a house - even a small one. Got a feeling that my home electric cooker is fused at 30A on it's own. Will have a look at the main fuse when I get home. We've got 3 phase 100A here at work - so potentially 72KW.

But you're right - if you want to charge a 100KWh battery from flat to full, then you're going to need 100KW of electrons*. The supply capacity only really affects how long it takes to get those electrons into the battery* - the cost will be similar (assuming you're not on some day/night tarrif).

* that's not how it works. There are the same number of electrons in a charged battery as there are in a discharged one. The charged ones just have a higher energy state. :-)

[Doctor Gollum]

We have two separate 30A lines in the house. One runs the cooker supply, tother used to be the shower, but has been rerouted to the garage. Currently isolated but the idea being to allow 30A single phase to be used for garage type stuff. 

Some interesting 3 phase things here:

https://www.meterboxesdirect.co.uk/three-phase-electricity-uk#:~:text=The%20three%2Dphase%20power%20circuit,for%20commercial%20and%20industrial%20buildings.

The 32A in my example previously was a from here: https://www.spiritenergy.co.uk/kb-ev-understanding-electric-car-charging#:~:text=Fast%20charging%20is%20defined%20as,The%20required%20current%20is%2032A.

[STEMO]

I notice that the model X is too posh to have gull wing doors and has falcon wing doors instead 

They're double hinged, where as gull wing are singe hinged

I see. So triple hinged would be......pterodactyl wings? 

[Sir Tigger KC]

I notice that the model X is too posh to have gull wing doors and has falcon wing doors instead 

They're double hinged, where as gull wing are singe hinged

I see. So triple hinged would be......pterodactyl wings? 

You're completely unhinged! 

[STEMO]

I only said, in my first post, that running an EV was becoming expensive. I didn't expect us all to become slaves by page 4  :'(

[STEMO]

I notice that the model X is too posh to have gull wing doors and has falcon wing doors instead 

They're double hinged, where as gull wing are singe hinged

I see. So triple hinged would be......pterodactyl wings? 

Did you know.....that pter means wing or feather? Yes, probably. But did you also know that helicopter has those four letters at the end? No, you didn't 

[Doctor Gollum]

I only said, in my first post, that running an EV was becoming expensive. I didn't expect us all to become slaves by page 4  :'(

Well, that'll learn you...

I hope that there will be some sort of revolution long before that point, assuming any of us are around to see it.

[Marks DTM Calib]

Maths was based on the following...

(square root of 3)1.73 x 32A x 240V = 13,286.4Wh or 13.29kWh

So to charge 93kW would take 7 hours.

22kWh would require a current of 53A which is somewhat optimistic for a domestic supply, even three phase.

Yes, its wrong!

Its 3 phase so 1.73 x 32 x 400 = 22kW power available 

[Marks DTM Calib]

Maths was based on the following...

(square root of 3)1.73 x 32A x 240V = 13,286.4Wh or 13.29kWh

So to charge 93kW would take 7 hours.

22kWh would require a current of 53A which is somewhat optimistic for a domestic supply, even three phase.

Why root 3? The correction you're applying is already accounted for in the 240V RMS calculation of voltage.

Most normal houses only have single phase, and the supply is typically fused at 60A. Flats can be 30A, but if you're living in a flat on the 12th floor of Nelson Mandela house then charging an EV is going to be problematic anyway. You can ask for the 30A/60A to be upgraded to 80A or 100A on a single phase.

A 22Kw wall charger does require 3 phase. Again you can ask to be upgraded. I suspect the local distribution grid is going to struggle though if/when every house in a street wants it.

root 3 is used for 3 phase power calcs as you don't actually get '3' times the power when its a 3 phase machine in delta wiring (you can in star but then the voltage is lower), but the voltage is 400 not 230