Charging reduced to 24 A.

[syburtruck]

They are likely the same issue. The PCS2 unit provides AC to DC conversion both ways. Just had my PCS2 unit replaced.

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[Tech-Savvy]

Couple weeks ago my AWD CT vin in the 10000 range stopped charging at 70% overnight, had a charging message on screen telling me to schedule appt. I did that day, drove home from work later that day and message was gone and it would only charge at 24 amps, that doesn't work for me in MN winters when I get home late and need to be charged by 6am. Dropped off this week Monday, they didnt get the parts until Wednesday, they just sent me a message that the technician stayed late to finish it up and it is ready for pickup. I have 47,500 miles on it, phew... just made it while still covered.

 

[mitch9]

I also note that your Voltage was showing 201-204V, the power company needs to either upgrade the transformer feeding your house, or upgrade the service drop to larger wire, they are allowed about an %8 low/high voltage from the standard 240V, this puts the acceptable power company AC supply voltage (measured at the meter) from about 220V to 260V, anything below that or above that, they need to correct, at least that was the case in my area in Massachusetts, I was getting 207V measured at the power meter, when I used to charge my ancient Tesla Model S with the dual onboard chargers (charging up to 80A), I had a 200A service, and they ended up putting a dedicated transformer on the pole at the street, since it wasn't possible to shorten the wire run any other way.. after this was done, I never had an issue again. And yes, the onboard charger can also have the issue with the 24A maximum charging issue/defect.. you may still have a low voltage issue, which you need to call your utility about correcting.. BTW, this takes a long time, they will do everything to delay this, as this is very costly to them.. in my case, it took over a year before the issue was resolved, but it is worth pursuing.

 

[Tech-Savvy]

I also note that your Voltage was showing 201-204V, the power company needs to either upgrade the transformer feeding your house, or upgrade the service drop to larger wire, they are allowed about an %8 low/high voltage from the standard 240V, this puts the acceptable power company AC supply voltage (measured at the meter) from about 220V to 260V, anything below that or above that, they need to correct, at least that was the case in my area in Massachusetts, I was getting 207V measured at the power meter, when I used to charge my ancient Tesla Model S with the dual onboard chargers (charging up to 80A), I had a 200A service, and they ended up putting a dedicated transformer on the pole at the street, since it wasn't possible to shorten the wire run any other way.. after this was done, I never had an issue again. And yes, the onboard charger can also have the issue with the 24A maximum charging issue/defect.. you may still have a low voltage issue, which you need to call your utility about correcting.. BTW, this takes a long time, they will do everything to delay this, as this is very costly to them.. in my case, it took over a year before the issue was resolved, but it is worth pursuing.

I know you are referencing the OP with the voltage comment, however would that mean the dealership that has my truck right now charging on it's charger has to upgrade their equipment? I just looked at it and it is at 201V, I looked at my home one that is charging the loaner they gave me and it is at 224V. Kind of funny that when I told them my truck was charging at only 24 amps when I brought it in, that the tech said they would verify that it wasn't my charger by using their known good chargers there at the dealerahip to verify.

 

[mitch9]

The dealer likely has 120/208 3-phase service, not the usual 120/240V single phase service that is what %99 of residential customers have. If you look at the "208V" number, they can go up to %8 above or below that voltage (191.36V to 224.64V) and still be in spec... again, it depends on what your electrical service voltage is, to see if they are within their %8 "window" of acceptable voltage (at the meter)

 

[darrenf]

Yes, but PCS is not part of battery nor powertrain. Just letting everyone know and make it clear ya know. Warranty ends at 50k for that item.

https://www.cybertruckownersclub.com/forum/threads/power-conversion-system-failure.46266/page-2. Yeah check that cost. Not insignificant.

I think that owner had other work done as well. I paid $1,800 for the PCS and $900 in labor to have it replaced.

 

[Brandon708]

I also note that your Voltage was showing 201-204V, the power company needs to either upgrade the transformer feeding your house, or upgrade the service drop to larger wire, they are allowed about an %8 low/high voltage from the standard 240V, this puts the acceptable power company AC supply voltage (measured at the meter) from about 220V to 260V, anything below that or above that, they need to correct, at least that was the case in my area in Massachusetts, I was getting 207V measured at the power meter, when I used to charge my ancient Tesla Model S with the dual onboard chargers (charging up to 80A), I had a 200A service, and they ended up putting a dedicated transformer on the pole at the street, since it wasn't possible to shorten the wire run any other way.. after this was done, I never had an issue again. And yes, the onboard charger can also have the issue with the 24A maximum charging issue/defect.. you may still have a low voltage issue, which you need to call your utility about correcting.. BTW, this takes a long time, they will do everything to delay this, as this is very costly to them.. in my case, it took over a year before the issue was resolved, but it is worth pursuing.

I charge at my shop. We have 3 phase 208.
The power supply is more than sufficient. I do have a universal Tesla charger just sitting there I would like to install one day to replace the 40amp charger I have there. That would help with charging speeds but it’s not the issue with what’s is going on with the truck at this time.

 

[mitch9]

If you look above at post # 20, I stated it is an %8 range from nominal, so a 3 phase 120/208 service has an acceptable voltage range of 191.36V to 224.64V). You never stated you had 120/208. when I had my issue years ago, with the 80A charging on the dual charger Model S, I had 120/240 single phase, the voltage was dropping down to 207 volts or so. it's possible to be multiple issues. yes, in your case and many others its a defective onboard charger.

 

[earthworm]

Guessing my PCS will need replaced too. Just got the charging alert and only seeing 24A on my cybertruck awd. Tried with multiple chargers.
38k miles
vin 70XX

 

[SteelMyHeart]

Just happened to mine too. Hardly use superchargers, typically charge on 42 amps from universall wall connector at home to provide some context. Have used powershare twice. For two days it was 24 amps, then truck gave alert it wont accept an ac charge. Haven't tried ac charging, battery now 48%.

For people who had this happen: does it still charge at superchargers? I would assume it would as that is dc.

I requested service as soon as issue came up but parts still in transit and service is 4 weeks behind where I live so being able to use a supercharger is a must.

 

[mongo]

Just happened to mine too. Hardly use superchargers, typically charge on 42 amps from universall wall connector at home to provide some context. Have used powershare twice. For two days it was 24 amps, then truck gave alert it wont accept an ac charge. Haven't tried ac charging, battery now 48%.

For people who had this happen: does it still charge at superchargers? I would assume it would as that is dc.

I requested service as soon as issue came up but parts still in transit and service is 4 weeks behind where I live so being able to use a supercharger is a must.

Units limited to 24A will likely still supercharge, but with total failure, it may not...

 

[CyberGus]

Units limited to 24A will likely still supercharge, but with total failure, it may not...

Well, there are two 24A AC->DC converters, and I suppose both could fail, making AC charging impossible. But the PCS unit performs other functions, like providing 48V, and without that your truck is dead in the water... it might be able to live off the MV battery, but not for very long.

 

[mongo]

Well, there are two 24A AC->DC converters, and I suppose both could fail, making AC charging impossible. But the PCS unit performs other functions, like providing 48V, and without that your truck is dead in the water... it might be able to live off the MV battery, but not for very long.

Yah, my thinking was one 24A converter is an isolated fault. Both could indicate a higher level problem that prevents any charging, or it's just both ACDC modules.
I think overall mode control lives outside the PCS which bodes well for Supercharging.

 

[MSL2]

Anyone ever see limited amperage at times when charging at home?

I have a UWC wired to a 60 amp breaker. I usually get the full 48 amps but on two separate occasions recently I'm getting reduced charging rates. Once 29 amps and once 41 amps.

Today (and most times) it charges at the full 48 amps.

Any idea why? Cold battery???

 

[SteelMyHeart]

Update, the no ac charging alert means no home charging or supercharging. Took it straight from supercharger to service center now as it would only be a matter of time before my 40% ran to zero.

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