EV charging, AC vs DC (over a distance)

[Ihavenojob]

If (and it's a BIG if) I get an EV, is charging it via DC direct from solar quicker than AC from solar with an inverter? The charging port will be about 30 metres from the house, so would running DC that distance have any benefit over using an inverter and AC, or will the DC lose power over that distance? Is it six of one, half a dozen of the other, or is there a definite winner?

 

[flameport]

I get an EV, is charging it via DC direct from solar quicker than AC from solar with an inverter?

Irrelevant, as you won't be charging an EV 'direct with DC'.
They all require 230V AC.

The only DC charge options for EVs are high powered dedicated charging devices as found at motorway services and the like, and even they require AC as the input, typically a 3 phase supply capable of at least 100kVA, and the units themselves cost upwards of £25k each for cheapo models.

 

[plugwash]

You can't charge an EV "direct" from solar panels.

In general, there are a few ways of charging EVs.

Single phase AC, generally supports up to 7kW with UK spec EVs. The simplest soloution and usually enough to charge most EVs overnight. The "charger" which converts the fixed incoming voltage to the charge voltage/current needed by the battery pack is inside the vehicle, with the chargepoint just being a switching/safety device.

Three phase AC, can support up to 21kW on some vehicles, but relatively few go this high. Again the charge management. The "charger" which converts the fixed incoming voltage to the charge voltage/current is inside the vehicle. Generally you will need a 3 phase grid connection if you want to go this route.

DC rapid. The charge point is now an actual charger, converting the incoming power to what is needed to charge the battery. Much higher speeds are possible but the equipment is expensive and provisioning a suitable electricity supply can also be a challenge.

There is at least one manufacturer, sigenergy, that offers 12KW and 25KW DC rapid charging modules for their home solar/battery system. The 25KW module is about £2K but that is of-course on top of buying the rest of their solar/battery system. If you use such a module it will also mean that your battery stack has to be located next to where you plan to charge your EV.