[cobratom]

There's more than one Tesla onboard charger...literally. You could get master/slave OBC's in a Tesla to double up the 45A (to the battery) "19kW" charger to 38kW...

You can do a lot more than 48A from the wall...

Yes, there are more than one onboard chargers but never a AC 38kW unit.
The max AC onboard charger has been 22kW for the older model S/X and 16.5kW if attached to 3 Phase power for the newer S/X

While the rest are limited to 11kW and some as low as 8kW.

Anything higher than those numbers and you are not using the AC onboard charger and are running a DC fast charge.

 

[remy_martian]

You are correct. The 38kW was a Brain fart where I used the pack voltage.

My Model X Signature would, however, pull 72A from the EVSE, a lot more than 48A, and a Master/Slave OBC will pull 48A each (23kW wall power), again a lot more than 48A.

 

[MattsAwesomeStuff]

So I just got the coolest piece of tech ever for my EV workshop, which is a 40kW rapidcharger from Kempower

What a dirty amount of charging for home use. I'm envious.

That said, I don't know how much of a hurry I'd ever be to fast charge at home. Like Remy said, you need fast charging on the road to a long destination, not suddenly right after supper again. Overnight charging should be plenty for most people.

Regardless, looks pretty cool.

I don't think people over here are familiar with how much you've contributed to open source EV development this last year or two, but, good on you and I hope it continues

 

[olegil]

In the EU, almost all homes have 3-phase power by default!

EU is not only Findland, Germany, France, etc. EU is also Estonia, Lithuania, Latvia, Bulgaria, Slovenia, Poland, Hungary - countries that carry a legacy of the Soviet regime(s), and typically aren't as economically agile. That was the basis of my comment.

You are of course right, but with membership to EU came both funds and regulations, so all new homes and nearly all renovated homes (ie, something like 90% of those who would consider an EV in the first place) have 3-phase 400V (TN or TT), where 240V is simply taking any single phase to neutral.

However, apartment complexes will typically have only 240V single phase to each unit. Though you wouldn't charge an EV inside an apartment anyway.

I live in a house with 3-phase 240V (IT), so only model 3 would charge at all direct from our 240V. To upgrade to TN would require not only a new fuse box in the house, but a new set of cables 200m up the road to the transformer station.

However, depressingly enough, new local regulations mean there's a fee added to the bill from the power delivery company if you have used more than 5 or 10kWh (three tier system) during a single hour in a month. So I will continue to charge at 240V/10A for the foreseeable future. Even that will bring me up to the second tier, unless I pay extra for a smarter charger than can throttle whenever more than one of water heater, stove top, oven or clothes dryer are also on. Or smarter appliances in the house, so water heater and floor heating does not come on while consumption is high.

 

[olegil]

It's not a real scenario to fully deplete your battery when you get home and where you HAVE to have a fully charged pack inside 2 or 3 hours.

You only need to charge to get to a fast charger

edit: yes, Hummer is 200kWh

For ev to be fully mainstream, we need to have two of them in every home, so charging two at the same time or in quick succession will quickly become a use case in some places.
If one of those is an R1T or both are model x/s, that means a lot of energy.

Also, dunno about your neck of the woods, but over here, tesla is the cheapest for supercharging, and that's twice the cost per kWh of charging at home.

 

[bawfuls]

Why on earth would you want to fast charge at home? It's worse for your long term battery health and home is the one place you're most likely to be able to charge for longer periods, since you sleep there.