Price of an electric car charger

Are you sure you heard correctly?

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Oh I don’t think he offered those services :joy:

As I mentioned, we’ve three phase, I’ve found a surprising number of houses in France have three phase. There must be some historical reason? @Badger So both our chargers can run at 11kWh, and one at 22kWh if the need ever arises, which I don’t frankly think it will. I can’t see me rushing in needing that, even if whatever car I have at the time could take it.

I didn’t know a charger could load balance at the circuit level, how does it know what the load level is? We load balance at the house, not the circuit level, it’s a separate box that the mains goes into and the charger and everything else is downstream. I guess when it senses we are getting up there it throttles back the charger circuit(s).

Obviously. Though I only use public chargers on long journeys, and then only high speed ones. My car can accept 205 kWH, but one rarely if ever sees that, and then only fleetingly, so even if both connections of a 350kWh charger are in use the real world impact is minimal. I’m a 20% to 80% man, so the coffee drinking and pee time usually exceeds the charge time.

I don’t know what you are referring to? Your home chargers? Your car will only pull what it can cope with, regardless of the charger capacity.

Three phase generation & distribution is more efficient than single phase, & the whole grid is three phase.

Anywhere above domestic level (max. 36kVA i.e. Tarif Bleu) will have a three phase supply, even if there is no need to run actual three phase kit. This is to spread loads across all the phases & keep things in balance.

For whatever reason when France was electrified they opted to use triphasĂ© everywhere. I’m guessing it was mainly down to cost as to deliver power via three phase cabling is lighter & cheaper than the same amount of power via monophasĂ©.

However, once domestic properties started having multiple numbers of larger monophasé items in them (washing machines, dishwashers, hairdryers, kettles etc.) the relatively low amount of power available on a single small phase of three became an issue.

Typically a property would have had a 45A/9kVA triphasĂ© supply i.e. 3 x 3kVA/15A. That doesn’t leave much headroom for other loads on each phase over & above the potential large appliances. As customers pay for an overall leveI of power of their choice having to oversize their triphasĂ© subscription just to cope with an overload on one phase wasn’t (still isn’t) a good thing. This is where the myth that triphasĂ© is more expensive than monophasĂ© comes from - the need to have a higher subscription to prevent it tripping.

It therefore became pragmatic (& safer) to start giving domestic properties larger single phase supplies, with grid load balancing being achieved by alternating houses being on different phases.

I don’t know if there was ever a move to provide all domestic properties with three phase when the UK was first electrified, but larger houses did have it. Clearly the lower voltage of single phase was a good thing (240V back then; 415V shocks were available across two phases
).

I don’t know, but I imagine that ENEDIS has seen a bit of resurgence in domestic properties converting to three phase supplies in order to use a three phase EV charger, or multiple monophasĂ© ones. I believe this is also true in the UK.

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Thanks for taking the time to explain Badger :slightly_smiling_face:

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