11.5 kw 48A not adding 46 mile per hour

[smggsm]

I it this charger it’s really good happy with it.. lot of charger for the money WiFi you can monitor and adjust the charging rate ..
my issue It show 48A max but I’m only at this rate should add at least 40 mile per hour but I’m only 27mile per hour .. I’m using 14-50 plug ..

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[agordon117]

First, you should not be running a nema 14-50 above 40A continuous. That's dangerous.

Second, nothing anywhere said 40 miles per hour for home charging with regard to cybertruck.

Some quick math says 29 miles per hour would be the expected if there were no losses, so 27 miles seems exactly correct.

 

[smggsm]

Thank you
What the amp rate should be ? It been set on 48a for a month over 1000 mile charged

 

[agordon117]

Thank you
What the amp rate should be ? It been set on 48a for a month over 1000 mile charged

For hard wired you can do the full 48. But for a plug, you are not supposed to charge above 80% of the current rating. So 40A would be maximum safe current on a nema 14-50.

 

[smggsm]

I thought This battery need to be balanced to charge 100% at least once a month ,That why I heard from service

 

[agordon117]

I thought This battery need to be balanced to charge 100% at least once a month ,That why I heard from service

I am not referring to charge percentage of the pack. I am referring to safe charging limits through a plug in the wall. Outlets were never designed to be used at their full current rating for 14 hours at a time. So the safe limit on a nema 14-50 is 80% of the 50A current limit, or 40A.


Also, the batteries in cybertruck are not LFP cells, so whoever gave you that guidance was incorrect. This is the second time I've heard someone say that service told them to charge to 100% once a month, but it is not needed for these cells as they are not LFP. Only charge to 100% when you need it. Otherwise keep your range limit at 80%.

 

[Gigahorse]

Thank you
What the amp rate should be ? It been set on 48a for a month over 1000 mile charged

40 Amps, also be sure that the plug is inserted firmly and not unplugged a lot (to the Nema).
It is going to take a long time to charge the CT at 40amps, basically overnight in most cases. This will be true until the new battery version comes out that allows better density and charging rates.

 

[smggsm]

thank you do the info , if make sense I probably need to wire it .. to be safe
What LFP stand for?

 

[agordon117]

thank you do the info , if make sense I probably need to wire it .. to be safe
What LFP stand for?

LiFePO4, or "Lithium Ion Phosphate"

These batteries are used in the standard range vehicles outside of the few 4680 model Ys they made at giga texas. The cells are cheaper, and less energy dense, which makes them a good candidate for the standard range vehicles.

 

[smggsm]

I have 2 Fiskers with 23kw batteries I think they come with LifePO4. For these cars balancing a must
100k miles now so far still strong ..
So I wasn’t Surprised when they recommended the balancing ..

 

[Bamaboy007]

27 to 29 mph is the fastest that a cybertruck is going to charge on a full 48 amp

 

[smggsm]

27 to 29 mph is the fastest that a cybertruck is going to charge on a full 48 amp

Is the the highest rate available for in-house wall charger ?

 

[agordon117]

Is the the highest rate available for in-house wall charger ?

Yes, for a hard wired one that doesn't use a nema 14-50. The charge rate is not limited by the wall charger to 48A, but by the internal charger in the truck. The wall charger is basically just a switch that allows power to flow into the charging circuit inside of the truck.

 

[smggsm]

You mean onboard charger limit 27 mile/hr ?
My question how the super charger push 250 mile?

 

[agordon117]

You mean onboard charger limit 27 mile/hr ?
My question how the super charger push 250 mile?

Supercharger bypasses the onboard AC charger for DC fast charging. The charger circuit for DC charging is in the supercharger, not in the car.

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