Juice Box and dropping KW…

[Tfreshman]

Is this normal. 50amp circuit start out around 9.68kw then drops to 6kw

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[Mach-Lee]

It's probably derating because your charge port is overheating:

https://www.macheforum.com/site/threads/l2-charging-speed-recently-dropped-33.28779/

I suggest cleaning your charge port and seeing if that makes a difference:

https://www.macheforum.com/site/threads/how-to-clean-your-charge-port.29901/

Your derate does look fairly severe, so you should definitely inspect your charge port for damage/melting.

 

[tbrumleve]

That’s not normal for a 50A circuit (40A charging). I get a steady 9.6kW all day every day. ChargePoint Home Flex @ 40A (50A circuit, hardwired).

 

[Tfreshman]

but doesn’t the car lower voltage from the charger as you near the end of the charge cycle. 0-80% vs 80%-100%

That’s not normal for a 50A circuit (40A charging). I get a steady 9.6kW all day every day. ChargePoint Home Flex @ 40A (50A circuit, hardwired).

 

[tbrumleve]

but doesn’t the car lower voltage from the charger as you near the end of the charge cycle. 0-80% vs 80%-100%

Only on DCFC, for AC charging, no.

 

[Tfreshman]

Only on DCFC, for AC charging, no.

got it. Thank you!

 

[Jack Roberts]

Is this normal. 50amp circuit start out around 9.68kw then drops to 6kw

I have a Juicebox 40 and have a nice steady line in less ic charge to 100 percent and then it starts to drop off at 90 percent in an arc to 100 percent. I always charge to 90 percent unless I am going on a trip and I get a nice straight line at 40 amps between 0 and 90 percent.

 

[Maquis]

I have a Juicebox 40 and have a nice steady line in less ic charge to 100 percent and then it starts to drop off at 90 percent in an arc to 100 percent. I always charge to 90 percent unless I am going on a trip and I get a nice straight line at 40 amps between 0 and 90 percent.

Correct - the charge rate will taper as the SoC approaches 100%. Even on AC.

 

[Tfreshman]

I think it was also a charger port temp issue as the car was sitting in direct sun. I was stuck at 9kw all night so we’re all good. Thanks all!

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