Home charging speed

[Ray324]

I picked up my CT Christmas eve, and I have one question? Why is my charging speed about half what it is on my model S.

On my model S I achieve 44MPH charging speed but on the CT it’s only 28MPH.

Does this have something to do with the batter architecture?

Thanks for the info.

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[Jager]

The pack on your CT is larger than the pack on your Model S.

Same amount of current coming out of your home charger. But the larger pack in the CT takes longer.

 

[eswimm]

MPH displayed while charging is based on the efficiency (Wh/mi) of the vehicle. The CT has lower efficiency (385 Wh/mi), so it appears to be slower charging. The actual charge rate is measured in kW (V*A) and will be the same in both vehicles.

 

[Carlos Thomas]

You gain about 11% of your battery back per hour when plugged in at home.

 

[AlmostHuman]

You can check to see what kW charge rate you are getting on both rides by looking at the app or the screen inside the vehicle if you have it set to show you percent instead of miles. That will tell you if you have something going on with the Cybertruck causing it to charge at lower rate than other rides. I have found that the Cybertruck charges at a higher rate than our 2020 X due to it being able to handle the higher voltage we normally see form from our mains, both are normally above 120v which makes the voltage the Wall Connectors kick out higher than 240v, normally around 245v and up to 250v at times. The 2020 X onboard charger throttles the amps when it is above 240v normally keeping the charge rate around 11.6 to 11.7kW. The Cybertruck does not throttle the amps allowing it to charge around 12kw on average. I noticed the same thing when a buddy was here charging his 2023 Model Y, the onboard charger seems to handle the higher voltage better. Interestingly the app will show the Cybertruck only pulling 11kW if you look at the vehicle area of the app but when you look at the home section (if you have solar/Powerwalls) it will show you the decimal value as well and shows 12kW most of the time the truck is charging here. I have also checked this with the other energy monitoring solutions we have on the breakers, it is indeed pulling 12kW.

Like others have said, the MPH you are getting is simply due to the Cybertruck not being as efficient as the Model S thus getting less miles for the same charge rate over time.

 

[igs]

Stop looking at mph and use percent or kwh.

 

[Crissa]

Stop looking at mph and use percent or kwh.

Mph is important! It's how fast you can charge up.

At 11kW my Zero would be charging at 133mph. (It would also melt, the battery is only rated for 6kW max.)

However... I'm baffled why anyone would think you could charge as much distance in the same time from the same power as a much smaller, more efficient vehicle.

But the miles is important because my charger maxes out at 17mph, which means it's going to take longer to get back that trip over the hill than a Cybertruck would.

-Crissa

 

[JimBuck333]

Put succinctly, the bigger battery of the CT results in a longer total charging time, whereas the higher energy consumption (per mile) of the CT results the miles of range building up more slowly.

 

[Woodrick]

I picked up my CT Christmas eve, and I have one question? Why is my charging speed about half what it is on my model S.

On my model S I achieve 44MPH charging speed but on the CT it’s only 28MPH.

Does this have something to do with the batter architecture?

Thanks for the info.

Because the truck uses twice the power per mile as your Model S.

If you look at the current/voltage, you should see that it is using the same rate, i.e. 48A/48A.

 

[ldiebel]

If you have a Tesla wall charger you can charge at up to 48 amps (x 240 volts=11,520 watts).
If you're using a Mobile charger in an NEMA-1450 (RV) plug you can charge at up to 32 amps (x 240 volts=7,680 watts)

Our Model 3 had about 75 kilowatt hour batteries.
From 20% to 80% would take 60% of 75=45 kilowatt hours.
On a Tesla wall charger, this would take 45 kilowatt hours / 11.5 kilowatts = about 4 hours.
On a Mobile charger, this would take 45 kilowatt hours / 7.6 kilowatts = about 6 hours.

Cybertruck has 123 kilowatt hour batteries.
From 20% to 80% would take 60% of 123=73 kilowatt hours.
On a Tesla wall charger, this would take 73 kilowatt hours / 11.5 kilowatts = about 6 hours.
On a Mobile charger, this would take 73 kilowatt hours / 7.6 kilowatts = about 9.5 hours.

Both have an EPA range of about 300 miles.

I've rounded some numbers, and there are inefficiencies that we're ignoring, but that's the gist

 

[ldiebel]

I'm sure you know this already, but make sure you're getting all 48 or 32 amps when you're charging.
You can adjust that in the vehicle or from the App.
Sometimes Tesla limits this if it sees a voltage drop or senses high temperature at the connectors, charger etc.

 

[Ray324]

If you have a Tesla wall charger you can charge at up to 48 amps (x 240 volts=11,520 watts).
If you're using a Mobile charger in an NEMA-1450 (RV) plug you can charge at up to 32 amp (x 240 volts=7,680 watts)

Our Model 3 had about 75 kilowatt hour batteries.
From 20% to 80% would take 60% of 75=45 kilowatt hours.
On a Tesla wall charger, this would take 45 kilowatt hours / 11.5 kilowatts = about 4 hours.
On a Mobile charger, this would take 45 kilowatt hours / 7.6 kilowatts = about 6 hours.

Cybertruck has 123 kilowatt hour batteries.
From 20% to 80% would take 60% of 123=73 kilowatt hours.
On a Tesla wall charger, this would take 73 kilowatt hours / 11.5 kilowatts = about 6 hours.
On a Mobile charger, this would take 73 kilowatt hours / 7.6 kilowatts = about 9.5 hours.

Both have an EPA range of about 300 miles.

I've rounded some numbers, and there are inefficiencies the we are ignoring, but that's the gist

Thanks for the help understanding this.

 

[Lasttoy]

My CT takes a day longer than my S.
The 4680 batteries are bigger. It's really bad when at very low level. Max of 32 amp is 18mph charge.
It's horrible. Super charging is bad also. I've Super charged over 100 times. 15000 miles. All over country. 250kw are slow. And. Max charge is only 318 miles. Period.

 

[FlykidCT]

My CT takes a day longer than my S.
The 4680 batteries are bigger. It's really bad when at very low level. Max of 32 amp is 18mph charge.
It's horrible. Super charging is bad also. I've Super charged over 100 times. 15000 miles. All over country. 250kw are slow. And. Max charge is only 318 miles. Period.

by your own admission (318/18=17.667) it takes -18 hours to charge your CT from 0 to 100% against all recommendations for EV charging habits. -Taking a DAY longer that your MS doesn’t make any logical sense with the provided information. Additionally, the “tank” in tour CT is around twice as big so if the charge rate (power) remains the same it would take twice as long - theoretically..

further more because power Volts x Amps is the best measure of charging - just saying 32amps doesn’t help any of to understand what your issue is I’ll assume you meant 220 x 32 =7,040 or 7kW. But if you are trying to do 110 x 32 = 3,520 or 3.5kW, that’s a whole other issue.

are you just complaining or looking for help with something?

 

[Lasttoy]

After 250k miles in a Tesla (3). I keep logs of Kw, miles. Times. What ever you say? Back it up with miles traveled, states. Good luck catching me. ?

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