High amperage charging option

High amperage charging option

Does anyone know how to access the "High Amperage Charging" option in the design page? It is a $1000 option but it is hard to access - I'm ready to order except for that 1 option. Thanks

Kariwood | December 7, 2015

When you are in the design studio just type charger ( anywhere on the page; but you won't see the letters and won't believe anything is happening) then scroll down and it will be at the bottom of the options.

rubiosity | December 7, 2015

Thank you - found it and just placed order! Excited!!!

clublon | December 8, 2015

The article includes the following: "If you are paying a minimum of $80,000 for a Model X, why on earth would you not pay an extra $1,000 to always be able to charge the car in half the time?" But, that statement is not true for superchargers, 110 and 220. Aren't most homes 220? I profess my electric charging ignorance. Isn't it more for destination chargers? If so, is it then worth $1,000?

Tâm | December 8, 2015


An onboard charger is a AC-to-DC charger.

Internalized AC-to-DC charger is slower than externalized DC-to-DC Supercharger.

The question is how much slower do you to your charger to be?

If you want it to be real slow, then equip your home with a 120V socket. It will take about three days to charge your battery in summer.

If you want it to be as fast as it can then equip your home with a 240V 100A circuit for your HPWC and your higher capability onboard charger.

Now why anyone in their right mind want to install a HPWC with 240V and 100A circuit for higher capability onboard charger?

Of course if you have all the luxury of time then choose a slower rate of time.

Suppose you forgot to charge your car last night, and now you need to charge your car before you go to work.

$1,000 means it's a 30 minute late for work or 1 hour late for work.

It could mean 1 hour late for work or 2 hours late for work to wait for enough charge.

The same principle: when you got home and you need to attend a function but so it's a difference of waiting for 30 minute late for work or 1 hour late for work...

Tâm | December 8, 2015

Also, some owners are on Time Of Use electricity rate.

Choosing a no additional fee onboard charger may mean you have to pay higher electrical rate due to prolonged charging into more expensive time.

Paying $1,000 for faster charge may mean you never have to pay a higher electrical rate because it is twice quicker than the barebone charger option.

Brian Vicars | December 8, 2015

Since it is not upgradable after delivery, you are stuck with 48 amps. if you change your mind later.
Please, everyone, purchase your vehicle with the 72 amp charger option. You will not regret the decision. You will, however, probably receive your vehicle at a later date since the 72 amp charger appears to be back ordered. | December 8, 2015

Also valuable for destination charging. It enables you to free up shared charging at some destinations in less time.

speyerj | December 8, 2015

"Paying $1,000 for faster charge may mean you never have to pay a higher electrical rate because it is twice quicker than the barebone charger option."

I'd be interested to see the math. At the higher rates, how long until you break even on that $1000? Here in Seattle we have no differential rate structure. I have my theories about the answer, but I don't know.

Tâm | December 8, 2015



Comparing charging without Off-Peak discount and the one with it for an EV that drives 20,000 miles per year:

$4,128 - 2,904 means a saving of $1,224 which is cheaper than paying $1,000 high amperage charger option.

gfb107 | December 8, 2015

Tâm, that's greatly over-simplified. You can still sign up for the TOU plan with the 48A charger.

You would still have the off-peak discount for most of your charging, it's just that some of your charging happens outside the off-peak window. Charging at 48A instead of 72A increases charging time by 50% (or you could say that charging at 72A instead of 48A reduces your charging time by 33.33%). With a 48A charger, you would use less power during the off-peak window (reducing your off-peak charges), and then add some charging time at the household rate.

So it really depends on how long the off-peak window is, how much charge you need every night, and the off-peak and regular price of power..

speyerj | December 8, 2015

What are the actual rates per kW? If the difference is $1000 a year, at least up here in Seattle at our rates that would be about 10,000 kWh to ring up a $1k bill (actually even more...but 10c is more of a country average). 10,000 kWh is enough to drive your Tesla nearly 27,000 miles...

speyerj | December 8, 2015

I suppose you did say 20k miles a year. God I'm glad I don't drive that much...

But I could also point out that if you are driving a daily commute of 54 miles (20k miles a year) that you can probably still manage to charge that during the off peak window using Tesla software. It's not like you are trying to fit in a full 90kwH charge every night unless you're driving 90k miles a year.

I could grant you that yes, I suppose the higher amp charger would let you wait more days between charging and then still theoretically fit in all your charging in one night during the low cost window. But I feel like I'm trying to create a scenario where the high amp charger is "necessary" rather than looking at reality. Part of the charm of charging at home is plugging it in every night and having the battery ready to roll every morning.

Claudedohrn | December 8, 2015

I'm a bit dense, so please help me understand this statement by Tesla when you're selecting the option:
'High Amperage Charger Upgrade
Take advantage of high amperage power sources by equipping your Model X with a 72 amp onboard charger. This upgrade will only reduce charge times when connected to power sources over 48 amps. Charge rates when connected to 110 volt outlets, 220 volt outlets or Tesla Superchargers will be unaffected."

I know it does not affect Superchargers. What does "charge rates when connected to 110 volt outlets, 220 volt outlets..." mean? If I (in my next house) install a 220V 100A outlet, will it charge faster than on my current (ha!) 220V 50A outlet?

Tâm | December 8, 2015


Thanks for pointing out such a confusing statement.

I think they mean: for the 240V, if your electrical source can only supply 48A and below, the faster charging rates are not any faster than a standard issued 48A charger even if you pay $1,000 extra for the higher amperage 72A charger.

Claudedohrn | December 8, 2015

^ fwiw, I asked at my local Tesla showroom, and the salesperson said she thought it would only speed up charging if you had a HPWC. I was unconvinced, since the statement could have simply said that, but it is frustrating that with the scarce information available, what little there is should be clearly stated.

Farmer Dave | December 8, 2015

For the faster home charging rate, you will not only need the HPWC, but it needs to be on a 220v 100A circuit.

THEN your charge rate will be 1/3 faster (but not really, due to charge tapering as the battery nears full).

Tâm | December 8, 2015


She is correct for the combination of 72A charger and standard HPWC set up.

Mobile connector can connect your power source to supply a maximum of 40A.

HPWC is hardwired from the wall to supply a maximum of 80A but if your car can take a maximum of 80A if it's a Model S, 72A if it's Model X (if maximally so equipped onboard.)

Claudedohrn | December 8, 2015

Well, I guess my next house gets a HPWC. Thanks.

Tedsla | December 8, 2015

All - This is confusing. Tesla's statement is correct about charging from Superchargers or the UMC when attached to conventional 110 and 220 sources wired to circuits less than 48A continuous power. But because some HPWC at home and at destination points are wired with circuits like 100A circuits. These chargers can deliver more current (Amps) than a 48 Amp charger can deliver to the battery. In these cases a 72A charger will cut your charging time period. The time savings will vary, like they say "your mileage may vary." It may or may not be significant depending on your situation.

milesbb | December 8, 2015

In the US the UMC is limited to 40 amps, it will not mater which charger you have in the model X, you will get 40 amps if using a UMC plugged into a 14-50 outlet, less if plugged into 10-30 or any of the other options Tesla makes available for the UMC. If you use a HPWC or a J1772 with a 60 amp or greater source you will get the full 48 amp charge rate using the 48 amp charger. If you have a HPWC or a J1772 with a 90 amp source or greater you will get the full 72 amp charge rate. The 72 amp charger only speeds charging over the 48 amp charger when connected to a HPWC or a J1772 with a 70, 80, 90, or 100 amp circuit.

paradis | December 9, 2015


"You will, however, probably receive your vehicle at a later date since the 72 amp charger appears to be back ordered."

Where di you see or hear this? I have seen nothing on the forums and the Tesla config page does not say anything about it causing a delay (they have noted it on other options in the past).

Brian Vicars | December 13, 2015

I am only speculating, based on information gained from this forum and the, You may recall the complaint that the first sigs would only receive a 48 amp charger. Telsa then changed their minds and said that the vehicles would come with the 72 amp version. Coupled with the fact that the 72 amp charger option is "hidden" in the design studio, it may lead one to speculated that very few are presently available.

speyerj | December 17, 2015

For what it's worth, I got a call from Tesla today in response to an email I sent. I was told that the 72A charging option will have no effect on delivery dates. I asked him twice.

Of course...he could be wrong. But that's what I was told. I wasn't going to get the 72A because I think it will be 1) largely useless to me and 2) I was worried it might delay delivery. I'm now considering MAYBE just getting it since it's not terribly pricey as a future proofing. But still on the fence. I have 12 hours to make my decision before it's finalized.

Brian Vicars | December 17, 2015

@speyerj. Thank you. I don't want my SigX delayed any longer than necessary.

ian | December 20, 2015

Bumping this up to the first page so folks that are still configuring know how to access it!

Russ | April 24, 2016

We ordered our Model X w the 72a charging option, but our first go with an electrician didn't capitalize on it. He was a bit confused and only hooked our charger up to a - I think - 50a source. We ended up with an accidental experiment.

Anyway, the car charged fully every night at 48a (using about half the available range each day) in under 4 hours, suggesting full charge in about 8 hours, achievable in off-peak hours of 10-6. .

Once we got the correct circuit, it charges in about 1.5 hours for about half the range consumed.

My takeaway was pretty simple: not necessary, not an economic benefit. In fact, now with all my electrician costs to run a 100a line into my garage loaded in, we're in for about $2500 total ($1500 + 1000) for the option to charge our car really fast. ROI/breakeven on that seems like it would take awhile.

It is for us ALL about covering up he accidental no-charge. Forget to charge and be able to get a full charge in half a day. For us that was worth the extra $.

wang5150 | April 24, 2016

Mine is configured with the 72a charger and I'm planning to run 100a line to my garage. I've got the new wall connector and I plan to daisy chain with a second one when the Model 3 arrives. The new wall connector will adjust charging rate based on state of charge so one can be charged quickly on 72a with headroom for the other. Then after an hour, it will switch the charging rate to the other vehicle with a lower state of charge.

aesculus | April 24, 2016

@Russ: You are correct the for a single car with the ability to charge overnight, 50 amps, even with a NEMA 14-50 plug and the UMC will work for most.

@wang5150 is why the 72a charging was created for. This is why Tesla made it an option and why the new Wall Charger does what it does.

And another scenario that will be important for the higher charging you may get while on the road is where they are daisy chained to allow faster charging in sequence. Today if you showed up and tied up a charger all night long, the chargers could not fill up your car and move to the next without being unhooked, moved and reconnected. This will be the benefit, but it will take years for that to occur. But without cars with the higher charging capacity like yours, we all lose this potential benefit.

PixelatedEngineer | April 24, 2016

I'm pulling 2 100A lines to the garage. I have no idea what the future holds but I want to be able to charge my plane and my cars at the same time.

ian | May 1, 2016

72a charger now SW upgradeable after delivery. Hmmm, where did we hear that before? ;-)

vperl | May 2, 2016


NumberOne | May 2, 2016

While we have heard about it being software based before, I am still glad I ordered it when I did because I paid only about half of the amount they will charge to activate it later. Kind of evens out with the $1,200 I paid for my HPWC...

Redmiata98 | May 2, 2016

And I thought I was the only one that paid that much for my HPWC!

rdainer | May 2, 2016

It's upgradeable after delivery? Where did you see that? I confirmed before everyone found the hidden amp thing ....and I installed a 50A charger in my house, but I still want the 72A option in case I can take advantage of it on trips

NumberOne | May 2, 2016

If you go to the current configuration page, you will see that it is possible to add it later for the very low price of just $1,900. Not sure if this applies to all cars or just from a certain point.

panoramic4 | May 3, 2016

Selected the High Amperage charging option so I need to order the Tesla wall connector. Has anyone here ordered one? Do I have to pay the shipping charge or can I order it at the service center? Sorry if this is not the correct place to ask this question in advance.

vperl | May 3, 2016

It is free wave the magic wand.

Go to the Tesla store read all about it

Navigate the Tesla web site for answers

darlin | May 4, 2016

I though the 72amp charging only affected the at home charge rate ie. HPWCharging. It makes zero difference in supercharging.

I just don't need to fully charge my X in two hours at home, so I did not spend extra money to cut the charge time down from 4 hours to 2 hours. I sleep longer than 4 hours, so it works well for me.

wallstguy | May 4, 2016

^I think it also affects destination charging...

ian | May 4, 2016

@darlin - It affects the charging at any AC source greater than ~60amps. So destination chargers (if on the proper sized circuit), and other HAL2 J1772 chargers.

@vperl - I'm confused. Are you referring to the wall connector or the upgrade to the 72 amp onboard charger?

vperl | May 15, 2016

Any AC charging will be better with the Tesla optioned on vehicle 72 Amp Charger. The HPWC , or a 50 ,Amp fused AC .

Superchargers charge vehicle with DC. The on board charger is BY-PASSED when DC current is used.

All explained by Tesla on the web site for all to read at their leasure.

Be Happy
Don't Worry

jwh8000 | May 16, 2016

I'm retired I don't care if it takes all night to charge my MX, I also don't get a break on the electric rate so it doesn't make any difference to me. I saved a 1,000 bucks with the 48 amp charger. You still get about 26 mph on a 50 amp circuit, that works for me.

loganboyd | May 16, 2016

City of Austin, Texas has a new program for $30/month unlimited charging as long as it's done between 7pm and 2pm the following day. Caveat is you have to charge at < 10kW. So with the new 48A on board charger, i still have to install just a 50A breaker and let it charge at 40A over 240V for 9.6kW. But $360/yr for all the gas you can use :)
also a $150 one time cost for installing the sub meter.

ernie | May 16, 2016

@loganboyd...sounds like a winner to me.

loganboyd | May 16, 2016

My back of napkins calculation was going to be about $650-$800/yr charging at my house without this program. $510 for year 1 and $360/yr thereafter seems like a pretty good deal to me. If you do want to charge at >= 10kW then they want $50/month which is too much. Also, for the $30/month, I get free charging at all of the ChargePoint stations around town and we have a LOT of them in Austin. There's even a L3 charger by my office but CHAdeMO and SAE Combo only and I don't think i will be buying the CHAdeMO adapter.

eric.zucker | May 16, 2016

Public European AC charge points are usually wired for 3x32A, so the fast AC charger gets you 50% more energy in the same time (3x16A standard, 3x24A fast).

An empty 90 kWh battery fills up in 8+ hours at 11kW, 6+ hours at 15kW.

Are there outlets in your area capable of providing enough current? Do you need to save the time?

It's not a significant cost saving. For example if I plug in during an hour of shopping, I get 11kWh of free energy worth $2.50, or 15kWh worth $3.50. Takes three years of daily shopping to amortize the fast charge option.

ian | May 17, 2016

@vperl - Not true. With a 50 amp circuit all you can pull is 40amps continuous (80%). That's what the Mobile connector (UMC) will provide. Which, according to math, is less than the 48amp base charger now standard on the S and X will provide. You would need to have at least a 60amp circuit to get the full 48amps.

The only AC connection able to benefit from the 72 amp upgrade will be HAL2 (High Amp Level 2) EVSE's like Tesla's own Wall Connector and other AC EVSE's able to provide more that 60amps.

Maybe you should take your own advice and go back and re-read the website and users manual. ;-)

Triggerplz | May 18, 2016


lilbean | May 18, 2016


wallstguy | May 18, 2016

Most circuits up here are 200amps. Surprised 50amp circuits even exist given the power used by A/C and other appliances