Universal Wall Connector Dropping Amps on Cybertruck — Need Insight

[Cyber]

Looking for some help diagnosing an odd charging issue.

I have a Tesla Universal Wall Connector on a 60A circuit, configured for the expected 48A max output. Lately the charger keeps dropping down on its own, even though nothing else is drawing load on that circuit.

What’s strange:

If I sit in the Cybertruck and manually adjust the charge rate, it will hold the higher amps, but once I walk away, the Wall Connector eventually falls back to 32A again.


Details:

• Cybertruck
• Universal Wall Connector
• 60A breaker
• Ground-fault and connections verified tight
• No obvious voltage sag
• It has charged at 48A normally in the past if coax it from the truck.

Before I start tearing into wiring or calling an electrician, has anyone seen this behavior? Is this a known UWC firmware issue? Truck-side software? Load-sharing glitch? Thermal derating?

Any experience or suggestions appreciated.

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[mongo]

Looking for some help diagnosing an odd charging issue.

I have a Tesla Universal Wall Connector on a 60A circuit, configured for the expected 48A max output. Lately the charger keeps dropping down on its own, even though nothing else is drawing load on that circuit.

What’s strange:

If I sit in the Cybertruck and manually adjust the charge rate, it will hold the higher amps, but once I walk away, the Wall Connector eventually falls back to 32A again.


Details:

• Cybertruck
• Universal Wall Connector
• 60A breaker
• Ground-fault and connections verified tight
• No obvious voltage sag
• It has charged at 48A normally in the past if coax it from the truck.

Before I start tearing into wiring or calling an electrician, has anyone seen this behavior? Is this a known UWC firmware issue? Truck-side software? Load-sharing glitch? Thermal derating?

Any experience or suggestions appreciated.

Does your display say 32/32 or 32/48 when this happens?
What voltage does it read when the current drops?
What light pattern is on the UWC when this happens?

 

[CT425]

OP are you getting any alerts?

 

[syburtruck]

If the display drops down to show a lower max charge rate after it starts to try and charge it's on you more than likely have a PCS unit going bad. A quick trip to service mode for alerts would confirm this.

My foundation cyberbeast just had this issue. It's a good 5-7 hour repair.

 

[Cyber]

Shows 48A max. Guessing it’s not my UWC.

No alerts.

 

[Cyber]

I see some other items; but not charging related unless I’m too ignorant. Looks like unrelated HVAC.

 

[marialegotruck]

is it cold where you are? mine drops in rate if it is really cold outside and I plug in.

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