AC charging limits

[Lookmanobrains]

So not sure if anyone remembers pre refresh Model X/S could home charge at somewhere around 72amps. That is of course if you had home charger that was capable putting out that much amperage. Tesla Gen 2 home chargers were capable of a max of 80 amps if connected to a 100amp circuit.

With the refresh of the Model X/S the brought the max home charging down to 48amps inline with the model 3/Y. They also changed the max charging rates on the Gen 3 home chargers To 48amps when connected to a 60amp circuit.

So this brings me to the question what’s the maximum AC charge the Cyber truck can handle from a home charger? Will my Cybertruck take all 80 available amps from my Gen 2 charger that is connected to a 100amp circuit?

I have a feeling that with the bidirectional charging higher charging rates for the Cyber truck may be available. But I’m wondering if the Cybertruck will with a simple Gen 2. Or other charger will accept the higher charge rate?

At 48 amp rate It takes me around 7.5 hours to charge my model X from 10%-90%. I think this is important consider that the main Cybertruck battery is approximately 25% larger than the battery in the model X/S this means it’s going to take close to 10 hours to fully charge the Cybertruck main battery. Add in the range extender which i’m guessing is 50kw? now your looking at maybe 14-15 hours to charge at 48amps.

if your like me and carry 1000lb of tools and drive 40k+ a year this could be an issue.

Does anyone know what the upper limit of the Cybertruck is for ac home charging using the tesla home charger. Also what happens to the charging limits when you have the bidirectional charging/backup power option installed.

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[Rutrow]

The CyberTruck has the potential for higher AC charging than other recent models because of its 800V battery that can be split into two 400V batteries at 400V DC Fast Chargers.

The early Model S had an optional "Dual Onboard Charger" that allowed for 80 amp charging. This was abandoned by Tesla fairly early on. I don't know if its discontinuance was due to low uptake rate on the option? or it was scrapped due to battery harm, or perhaps even overheating/fires in owners home wiring? That is a lot of current passing over wires that may have been installed by shoddy electricians or even naive, overconfident DIYers.

I haven't seen anything about higher AC charge amp limits, but have my fingers crossed for future updates. ?

 

[Lookmanobrains]

Thanks for the reply.

I now have a 22 M-X however i did have a 2018 M-X and i can tell you while charging the 2018 at 70+ amps the charging handle on my Gen 2 wall charger would get quite hot. I scanned it with a FLIR device and my recollection was that the temp exceeded 110deg.

I really think the CT with the larger battery capacity needs more amps somehow for home charging.

once again thanks for the input and happy new year

 

[scottf200]

Thanks for the reply.

I now have a 22 M-X however i did have a 2018 M-X and i can tell you while charging the 2018 at 70+ amps the charging handle on my Gen 2 wall charger would get quite hot. I scanned it with a FLIR device and my recollection was that the temp exceeded 110deg.

I really think the CT with the larger battery capacity needs more amps somehow for home charging.

once again thanks for the input and happy new year

Certainly, you realize that you are a corner case?
40K miles/yr @ ~250 work days is 160 miles per day.
It used to be that the average persons daily drive was < 40 miles (1/4th).

I can appreciate your situation but I suspect Tesla would not account for corner cases like yours.
I would guess they have standardized on 48 amp ... but then again there are some first on the CT including bi-directional charging.

The universal wall connector that explicitly mentioned the cybertruck says 11.5 kw & 48 amps.

https://shop.tesla.com/product/universal-wall-connector

 

[Lookmanobrains]

Much truth to what you say. However I’m in rental managment and I’m contractor i can tell you that the majority of my piers in the construction field drive with the same loading and mileages.

Also take into consideration the power output capabilities of the CT. If this truck is going to be successful in the long run it’s going to need to perform tasks in the commercial market.

I can see scenarios where it’s driven 50 miles round trip but then be used to power the job site. Consider that at 48amps it will take around 10 hours to charge from 10%-90%. Then add in the range extender and you’re looking at 14+ hours. That’s a truck that once you come home from work it cannot be moved from the charger. No working all day and then going out for dinner or to the supply yard to prep for tomorrow day.

Hopefully Tesla has plans to turn back the hands of time and get 80amps of home charging wither it’s thru the bidirectional cabling or upgraded home chargers.

 

[Zoomit]

The on-board charger is limited to 48A, per Tesla's documentation to the EPA:

Ref: https://dis.epa.gov/otaqpub/display_file.jsp?docid=58897&flag=1

 

[Lookmanobrains]

Wow constantly amazed at the quality of information that’s available on forums.
Thanks so much for taking the time to answer my question and for providing the source documentation!

 

[Woodrick]

The CyberTruck has the potential for higher AC charging than other recent models because of its 800V battery that can be split into two 400V batteries at 400V DC Fast Chargers.

The early Model S had an optional "Dual Onboard Charger" that allowed for 80 amp charging. This was abandoned by Tesla fairly early on. I don't know if is discontinuance was due to low uptake rate on the option? or it was scrapped due to battery harm, or perhaps even overheating/fires in owners home wiring? That is a lot of current passing over wires that may have been installed by shoddy electricians or even naive, overconfident DIYers.

I haven't seen anything about higher AC charge amp limits, but have my fingers crossed for future updates. ?

The 800/400 battery configuration only is important to DC charging. AC charging is well below enough to even tickle the battery.

From my understanding, dropping the 80A charging was because uptake with nil. And that's because there aren't many houses capable of it. Homes with 100A panels certainly aren't capable of it and many homes with 200A panels are already too full.

 

[Woodrick]

Certainly, you realize that you are a corner case?
40K miles/yr @ ~250 work days is 160 miles per day.
It used to be that the average persons daily drive was < 40 miles (1/4th).

I can appreciate your situation but I suspect Tesla would not account for corner cases like yours.
I would guess they have standardized on 48 amp ... but then again there are some first on the CT including bi-directional charging.

The universal wall connector that explicitly mentioned the cybertruck says 11.5 kw & 48 amps.

As well as the Powershare connector
Powershare | Tesla
In a video, the Tesla team indicated that the built the onboard charger as bidirectional, 11.5kW in or out.

 

[scottf200]

Much truth to what you say. However I’m in rental managment and I’m contractor i can tell you that the majority of my piers in the construction field drive with the same loading and mileages.

Also take into consideration the power output capabilities of the CT. If this truck is going to be successful in the long run it’s going to need to perform tasks in the commercial market.

I can see scenarios where it’s driven 50 miles round trip but then be used to power the job site. Consider that at 48amps it will take around 10 hours to charge from 10%-90%. Then add in the range extender and you’re looking at 14+ hours. That’s a truck that once you come home from work it cannot be moved from the charger. No working all day and then going out for dinner or to the supply yard to prep for tomorrow day.

Hopefully Tesla has plans to turn back the hands of time and get 80amps of home charging wither it’s thru the bidirectional cabling or upgraded home chargers.

I understand that there are corner cases for sure. I think there will be many 1000s of commercial market scenarios that don't require that far in travel *daily* tho. I suspect many commercial fleets will be using BEV trucks. Some may be able to charge during the day at work sites, etc so there is not a requirement for 10-14 hrs of charging at 'home'. Hope that makes sense.

It seems like the main options are
a) do a "short" supercharge (10-ish minutes?) - short walk, get coffee, paperwork, etc
b) continue to utilize a ICE truck ... which I suspect will be the 90%+ people will do if they max out the available resources (time, 'fuel', etc)

 

[Lookmanobrains]

Wow constantly amazed at the quality of information that’s available on forums.
Thanks so much for taking the time to answer my question and for providing the source documentation!

The 800/400 battery configuration only is important to DC charging. AC charging is well below enough to even tickle the battery.

From my understanding, dropping the 80A charging was because uptake with nil. And that's because there aren't many houses capable of it. Homes with 100A panels certainly aren't capable of it and many homes with 200A panels are already too full.

I too share your opinion regarding 100amp dedicated to charging your car being excessive loading for most residental panels.

 

[Woodrick]

Much truth to what you say. However I’m in rental managment and I’m contractor i can tell you that the majority of my piers in the construction field drive with the same loading and mileages.

Also take into consideration the power output capabilities of the CT. If this truck is going to be successful in the long run it’s going to need to perform tasks in the commercial market.

I can see scenarios where it’s driven 50 miles round trip but then be used to power the job site. Consider that at 48amps it will take around 10 hours to charge from 10%-90%. Then add in the range extender and you’re looking at 14+ hours. That’s a truck that once you come home from work it cannot be moved from the charger. No working all day and then going out for dinner or to the supply yard to prep for tomorrow day.

Hopefully Tesla has plans to turn back the hands of time and get 80amps of home charging wither it’s thru the bidirectional cabling or upgraded home chargers.

While the numbers that you quote are indeed possible, I feel that they are far from reality. 50 miles will take about 2 hours to recover the charge. 240V @48 A should be around 20-25 mph. But if charged at a commercial location it could be only 208 @48A which would be slightly slower.

 

[C T Rick]

Don't know what part of the country you live, but where i'm at in Los Angeles, 11 mph has been my average speed for well over 10 years now. doucumented on my Sprinter and Nissan NV. Fortunatly both Vehicles see under 5000 annual miles combined. So the CT is way too small for me to work out of as a plumbing contrator. But it could replace my SUV that puts on more miles for weekend fun.

I purchased a 200 amp panel with anticipation of an electric vehicle and new Hybrid electric water heaters.

Rick

 

[Woodrick]

Don't know what part of the country you live, but where i'm at in Los Angeles, 11 mph has been my average speed for well over 10 years now. doucumented on my Sprinter and Nissan NV. Fortunatly both Vehicles see under 5000 annual miles combined. So the CT is way too small for me to work out of as a plumbing contrator. But it could replace my SUV that puts on more miles for weekend fun.

I purchased a 200 amp panel with anticipation of an electric vehicle and new Hybrid electric water heaters.

Rick

All you can say is

There are a couple of work EVs comparable to the Sprinter and Nissan out there. With your driving habits, they would be perfect for saving a LOT of money.

 

[scottf200]

40:50ish nice background and comparisons.

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