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Series 1 HPWC issues with 2018 model S
- Thread starter rmholbrookjr
- Start date
EGK1
Member
The post is about 2018 cars and it looks like the people who have had issues are those with Gen2 MCU's charging with Gen1 HPWC
EGK1
Member
So a Tesla Mobile Tech came over to check out my issue yesterday and could not figure out why the HPWC was tripping with the Model X but worked fine with my 2015 S P85D. They have ordered me a new Gen2 HPWC which should be here on Friday.
whitex
Well-Known Member
Just a data point to confirm, I charged at a Gen 1 several times over the weekend at a destination charger on vacation on my MCU1 X, so def does seem to be some ‘improvement’ in the MCU2 cars!
Our X 100D arrived last Thursday. At home, we're charging it on the 14-50 connector that we used with our 2012 S P85 (which we traded-in for the X).
We've noticed that the charging will start at 40A and then drop down to 26-27A by the end of charging.
Is anyone else seeing this?
Is Tesla tapering home charging? Is there an incompatibility with the 14-50 connector (which we purchased early last year)? Or is this an issue with the software or onboard chargers?
We've noticed that the charging will start at 40A and then drop down to 26-27A by the end of charging.
Is anyone else seeing this?
Is Tesla tapering home charging? Is there an incompatibility with the 14-50 connector (which we purchased early last year)? Or is this an issue with the software or onboard chargers?
In my experience, charging always tapers. I have two Gen 2 HPWCs (see sig) and it always slows down ‘towards the top’. I use a max of 40 amps usually (unless in a hurry) and I always see it go to 20 and to 5, (continual, not steps) before stopping at my usual limit of 80 kWh.
EGK1
Member
It appears to be a constant red blink but perhaps it is a single blink that is just repeating; can't say for certain.
whitex
Well-Known Member
1 flash means ground fault. Are you sure the red flashes on the HPWC are not grouped in larger groups?
whitex
Well-Known Member
Where is this dip switch?
Gen1 HPWC has this the dip switches shown below, but nothing about "legacy mode". From the installation manual:
Aha, then it applies to my European model only.Where is this dip switch?
Gen1 HPWC has this the dip switches shown below, but nothing about "legacy mode". From the installation manual:
View attachment 313133
EGK1
Member
Yep, those guys made me and my mates totally uninteresting for the girls in our school.Aha and Norway reminds me of the good old 80's. Sorry,.. just had to do it. ;-)
They made some cool songs describing AP2 though, "Hunting high and low", "Stay on these roads" etc
richrootes
Member
A couple of weeks ago, we had a late 2017 S75D loaner
We had similar issues with the Gen 1 HPWC - charging the 75D tripped my 50A RCD Breaker a few times, and reduced the charge current down to 30A (from 40A) a couple of others
I did notice the charge port was really tight compared to my car (wasn’t this an issue recently?) so put the inconsistencies down to this
Because it was a loaner, we had no remote access, so had to keep checking the car to make sure all was well
When we got our car back, we plugged in and have had no issues since
So - it’s either a change in the port, a change in the car’s wiring, or the firmware in the old HPWC is not upgradeable to be compatible with some newer model foibles
We had similar issues with the Gen 1 HPWC - charging the 75D tripped my 50A RCD Breaker a few times, and reduced the charge current down to 30A (from 40A) a couple of others
I did notice the charge port was really tight compared to my car (wasn’t this an issue recently?) so put the inconsistencies down to this
Because it was a loaner, we had no remote access, so had to keep checking the car to make sure all was well
When we got our car back, we plugged in and have had no issues since
So - it’s either a change in the port, a change in the car’s wiring, or the firmware in the old HPWC is not upgradeable to be compatible with some newer model foibles
Talked to Tesla's charging team yesterday about the situation.
They are aware of some incompatibilities between Gen 1 charging hardware (HPWC, UMC, 14-50 connector) and the new MCU 2 cars.
I suspect the problem is caused by the faster MCU2 processor - the software is running faster on the new MCU, causing communication problems with the older charging gear.
With our Gen 1 HPWC, our new X 100D detects the HPWC can support 72A, starts to charge and almost immediately trips the HPWC, resulting in a "red ring of death" at the charging port. Resetting the breaker on the HPWC causes the process to repeat - and another red ring of death.
Using our Gen 1 14-50 connector, the X 100D starts at 40A of charging and appears to ramp down to 26A by the time it reaches 90% charge.
We haven't had any problems using the same charging hardware with our 2012 S P85 (now traded-in for the new X) and 2017 S 100D.
Even with reduced amps, we are able to charge our new X overnight.
The problem is with destination chargers - we did a short road trip last weekend, and the Gen 1 HPWC's kept interrupting charging - though we could have switched to the adjacent J1772 charger, which likely works OK, just slower.
The charging team indicated the problem is being reviewed - and we'll should see a software fix within the next month or two. Until then, if we take a road trip, we'll make sure we have a Plan B for destination chargers, in case we encounter this problem on the road...
They are aware of some incompatibilities between Gen 1 charging hardware (HPWC, UMC, 14-50 connector) and the new MCU 2 cars.
I suspect the problem is caused by the faster MCU2 processor - the software is running faster on the new MCU, causing communication problems with the older charging gear.
With our Gen 1 HPWC, our new X 100D detects the HPWC can support 72A, starts to charge and almost immediately trips the HPWC, resulting in a "red ring of death" at the charging port. Resetting the breaker on the HPWC causes the process to repeat - and another red ring of death.
Using our Gen 1 14-50 connector, the X 100D starts at 40A of charging and appears to ramp down to 26A by the time it reaches 90% charge.
We haven't had any problems using the same charging hardware with our 2012 S P85 (now traded-in for the new X) and 2017 S 100D.
Even with reduced amps, we are able to charge our new X overnight.
The problem is with destination chargers - we did a short road trip last weekend, and the Gen 1 HPWC's kept interrupting charging - though we could have switched to the adjacent J1772 charger, which likely works OK, just slower.
The charging team indicated the problem is being reviewed - and we'll should see a software fix within the next month or two. Until then, if we take a road trip, we'll make sure we have a Plan B for destination chargers, in case we encounter this problem on the road...
EGK1
Member
Im glad to hear that they are aware of the issue and are working on a software fix. I'm thankful that they have ordered me the new Gen2 HPWC to fix my home charging issues but that will not resolve those Gen1 destination charging issue that could come up later. I would think that this will be an issue that they will want to get fixed quickly as more and more of the new MCU cars get out there. I'm sure they don't want to replace every Gen1 HPWC at every resort across North America.
I suspect when they tested MCU2 - they focused on Gen 2 chargers.
For home charging, this will only impact owners who have MCU1 Tesla cars (it's likely most MCU2 purchases are by first-time Tesla owners).
The Gen 1 destination chargers is a bigger challenge - something Tesla likely would not want to fix by sending out Gen 2 HPWCs to the early destination charger locations.
Though, based on our experience last weekend on a short road trip, it's possible that the Gen 1 HPWC may provide some charging, if it's set down to lower amps (ours is set to 80A - and fails immediately).
Wonder what other bugs exist in the MCU software due to the faster processor speed... Surely this affects more than just the Gen 1 charger communications...
For home charging, this will only impact owners who have MCU1 Tesla cars (it's likely most MCU2 purchases are by first-time Tesla owners).
The Gen 1 destination chargers is a bigger challenge - something Tesla likely would not want to fix by sending out Gen 2 HPWCs to the early destination charger locations.
Though, based on our experience last weekend on a short road trip, it's possible that the Gen 1 HPWC may provide some charging, if it's set down to lower amps (ours is set to 80A - and fails immediately).
Wonder what other bugs exist in the MCU software due to the faster processor speed... Surely this affects more than just the Gen 1 charger communications...
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