Customer Superchargers ?

Customer Superchargers ?

Ok, so we know the folks at Tesla are smart so how long to you think it will take them to come up with customer Superchargers?

The Tesla built Superchargers are built using 10 of the 10kw on board chargers so we know they can be stacked.
Supercharger high current connection is available and the cars have been designed to deal with the thermal loads associated with 1C charging (most of the capacity in an hour).

Thinking hard disk slots or CPU module slots in a typical server, how long do you think it will be before there is a rack system that allows you to plumb 220V 400 amp (or three phase at a lower amperage) service to your rack and populate it with chargers to get the recharge speed you want?

Anyone at Tesla want to chime in here?

jat | 22 november 2012

Getting that level electrical service to your home might be a problem and would definitely be expensive. More likely, the only way to get higher charging speeds like that would be to have a large battery at your house, charge it slowly, and then dump that charge into the Model S quickly at supercharger rates.

That isn't going to be cheap, and I can't imagine they would build something that maybe 20 people would buy.

Vawlkus | 22 november 2012

EXTREMELY bad idea. High voltage/amperage lines are NOT things to be fooled with. Besides, your power bill for one of these stations would be crazy during use unless you found a way to make power back.

Jolinar | 22 november 2012

well, customer superchargers for home purposes are very bad idea...

However, lets say I am fan of EVs (and maybe even owner of some Tesla EV) and I own a restaurant or museum or whatever so I would make some kind of contract with Tesla to mount 1 supercharger at my parking lot for me and my customers. This way it is much more likely than mounting it at my house ;)

Contract could be something like I would pay whole or large part of building cost, but not paying electricity charget to the car, so this way it could stay free for Tesla cusomers while owning the supercharger.

It's just an idea, I really don't know whether it could work...

BYT | 22 november 2012

That idea would expedite getting Superchargers all over the place more quickly and internationally. Almost seems like necessity to adopt some variation of this model for quicker expansion.

Brian H | 22 november 2012

Well, unless they run out of, or can't get, locations with utility buy-back for solar (enough to feed the cars on average), the free electricity isn't really sustainable. Semi-private or private placements would be well down the list of desirable spots, IMO.

The "free long-distance charging for life" model works in part because it is only a fraction of total use -- intercity l.d. travel.

Brian H | 22 november 2012

Sorry, that first sentence has missing bits.
"Well, unless they run out of, or can't get, locations with utility buy-back for solar (enough to feed the cars on average), free electricity (currently covered by Solar City) paid out of Tesla revenues is not in the plans and isn't really sustainable."

lolachampcar | 22 november 2012

The idea is not as crazy as you think. Normal large house service is 400 amps so this is not out of the ordinary. As for cost, you are going to put XYZ watt-hr into your battery. Doing it in 60 minutes versus 8 hours makes a small difference (charging is more efficient at C/8 then 1C) but the cost will be basically the same.

Given that the Tesla Supercharger concept is based on stacking the existing production 10kw chargers, all that is required is a rack system for the house (or business). This rack along with all the supporting communication system already exists for the Supercharger so providing just that piece is not as big a deal as a ground up design.

I whole heartedly agree that it will be way down the road, if ever. There would only be a few out there that would need or want it. It was just a whimsical thought.

DouglasR | 22 november 2012

Don't forget that a setup like this will likely flip you into whole new rate category from your utility. Most electric utilities impose a demand charge when maximum demand exceeds a certain level. The load profile of one of these units would have a very low power factor, so the electricity could get very expensive. When I have time, I'll take a look at my utility's rate schedule to get an idea of what the difference would be.

mrspaghetti | 22 november 2012

It's hard to think of a set of circumstances that would make it worthwhile to install a supercharger at one's house.

Docrob | 22 november 2012

I think residential superchargers are just silly, huge cost, safety and regulatory difficulties for so little gain. The far more important question is when/if they will offer private commercial superchargers for sale or license their production? I can imagine a service station having a commercial supercharger pay per use, or a restaurant wanting it as a marketing and customer attraction tool. In the end if offering commercial licenses got more rapid charging out there at no direct cost to Tesla (in fact a profit to Tesla) then surely that's something worth pursuing.

DouglasR | 22 november 2012

@Docrob ++

Jolinar | 22 november 2012

yea, free usage of superchargers is great, but I agree that most people would also be able to pay for it so this commercial SC could work fine.
Superchargers owned by Tesla/SolarCity would be free, commercial SC would be paid (or included in the lunch/dinner/ticket to whatever).

Brian H | 22 november 2012

But that torpedoes the "free charging for life" promo value Musk/TM want. Don't think it will happen.

Right now the bottleneck is utility/regulatory clearances. Lotsa h/w ready to go.

Brian H | 22 november 2012

It also creates a whole special admin layer of overhead. This way is SO much simpler.

gimp_dad | 22 november 2012

I think it would be pretty cool. Great for that occasion where you drive around all day and then want to get out of town for dinner.

I see no real issue if it is installed professionally and the home owner had sufficient service at the house.

I had always assumed it required 408V service to drive it and didn't know about the "stacking" of the chargers as mentioned by the original poster.

Almost feels like you would actually need more like 600A service in order to take full advantage so you could dedicate 400A just to charging while using the other 200A for the rest of your house. If you had multiple cars you could charge them sequentially since it would be so fast.

lolachampcar | 23 november 2012

if I were to do something in the future, and that is a big if for all the reasons discussed above, I would have my utility pull a separate service for the charger (my house has 250 amp service and I am currently adding natural gas so I can free up service for the Model S on the way) so it would have a dedicated supply.

As for the charger itself, I would think it some sort of rack system where you could populated the number of charger modules you desired up to a 1C rate which seems to be 8 to 10 chargers.

Professional installation and proper service/venting/cabling are all givens.

Again, this would not be for many and nothing for Tesla to be looking at given all the low hanging fruit they are currently picking. It's more just a what if type conversation.

lolachampcar | 23 november 2012

BTW, if the Model S is trouble free then I'm going to need another 40 to 100 amp service for the wife's car :)

jerry3 | 23 november 2012

The big problem with the Model S is going to be that if you have a significant other, you might not get to drive it all that often.

pilotSteve | 23 november 2012

not to go off track (this has been discussed many times before), this is why I am going for dual chargers and HPWC: "poor man's supercharger", e.g. the best currently available for home installation!

Brian H | 23 november 2012

And more for their replacements when the kiddies inherit yours ...


Larry Chanin | 23 november 2012

So lets see, to do this the home owner would have to be willing to spend maybe $20,000+ for the Supercharger cabinet populated by 8 to 10 chargers and electronics, and several thousands for an addition new electric service panel. Then he/she would have to be prepared to pay for the substantial demand charges. Finally, there's going to be the huge utility fees to install a second dedicated tranformer and service at 480 volts, probably at three phase (assuming that three phase is even available near the neighorhood) to the residence.

Why would anyone need to spend this very serious money? Running an electric taxi service out of your home? ;-)


Volker.Berlin | 24 november 2012

Running an electric taxi service out of your home? ;-) (Larry Chanin)

In that case you'd probably be better off with owning more than one Model S and charging/driving them alternating.

lolachampcar | 24 november 2012

I bought a plane once from a guy with a G550, Pilatus, Eurocopter and two Extra 300Ls. I asked myself "why?" but then I do not sit on his wallet. An in house SC would not be out of the question.

Pilotsteve, I took your approach :)

Brian H | 24 november 2012

true, but so rare and potentially troublesome that it would not be worth TM's while to offer or facilitate it.