Welcome to Tesla Motors Club
Discuss Tesla's Model S, Model 3, Model X, Model Y, Cybertruck, Roadster and More.
Register

>24A charging at EVSE stations?

brianp6621

Member
Mar 20, 2018
55
20
San Jose
So there are free Clipper Creek charging stations at my work. The label on then seems to indicate that they will output 32a continuous but my S100D won't let me set higher than 24A and I get a message saying "reduced charging rate" on all of them.

I have searched and find conflicting answers. Is this normal?

Brian
 

harry

Member
Jul 17, 2012
322
220
Prince Edward Island & Wisconsin
No, that's not normal. A Clipper Creek 40A unit should put out 32A continuous. Tesla reduces power when the car thinks there is some problem with the circuit, such as low voltage. Especially with three phase wiring where the charging station is far from the circuit box, the voltage will sometimes be below Tesla's pretty strict threshold.
 

brianp6621

Member
Mar 20, 2018
55
20
San Jose
No, that's not normal. A Clipper Creek 40A unit should put out 32A continuous. Tesla reduces power when the car thinks there is some problem with the circuit, such as low voltage. Especially with three phase wiring where the charging station is far from the circuit box, the voltage will sometimes be below Tesla's pretty strict threshold.
So how can I see if it is the car vs the installation of all chargers? Since they all act this way it seems the 2 conclusions are it is the car or the voltage drop effects all chargers since they presumably all go to the same panel?
1. Check with another Tesla owner
2. Try other similar like panels but installed elsewhere that hopefully don't have the issue
 

ewoodrick

Well-Known Member
Apr 13, 2018
5,285
3,732
Buford, GA
Does the Clipper Creek have a Tesla cable or are you using the adapter?
I'm using the adapter and I think that it may be the limiting factor.
 

MorrisonHiker

S 100D 2021.12.25.7
Mar 8, 2015
9,843
9,211
Colorado
Did you try contacting your employer or whomever manages the charging stations? We have 36 32 amp charging stations at my employer. 99% of the time, they run at 32 amps but they can be "load managed" and the power to each can be individually adjusted if needed.
 

scaesare

Well-Known Member
Mar 14, 2013
8,439
14,268
NoVA
Voltage drop will do it (and seems likely in tis case), other spikes/noise/dropouts on the line will trigger this as well.
 

davewill

Active Member
Feb 5, 2014
1,828
1,979
San Diego, CA, US
I think the car display will still show 32a as the maximum (24/32 for example) when it's the car that is limiting the charge rate. If the EVSE was limited to 24a, then the display would definitely show that as the max.
 

About Us

Formed in 2006, Tesla Motors Club (TMC) was the first independent online Tesla community. Today it remains the largest and most dynamic community of Tesla enthusiasts. Learn more.

Do you value your experience at TMC? Consider becoming a Supporting Member of Tesla Motors Club. As a thank you for your contribution, you'll get nearly no ads in the Community and Groups sections. Additional perks are available depending on the level of contribution. Please visit the Account Upgrades page for more details.


SUPPORT TMC
Top