Home chargers (Tesla UMC)

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Elio

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Hi everyone

I have an issue, that my facelift MG5 won't really charge on my tesla UMC charging cable. It sometimes charges for a view minutes when i start up the car (like i would drive). On other typ 2 chargers (i tried an opel one) and also on wall boxes it charges fine. I checked my tesla charger and it works with a ford focus electric and with a Tesla. I also borrowed an other tesla UMC to check and its the same.

Does someone experienced something like that with other chargers?

I really like the tesla UMC because it can charge from 220V 10A and also 400V 16A depending on the plug.
 
Last edited by a moderator:
Elio said:
Hi everyone

I have an issue, that my facelift MG5 won't really charge on my tesla UMC charging cable. It sometimes charges for a view minutes when i start up the car (like i would drive). On other typ 2 chargers (i tried an opel one) and also on wall boxes it charges fine. I checked my tesla charger and it works with a ford focus electric and with a Tesla. I also borrowed an other tesla UMC to check and its the same.

Does someone experienced something like that with other chargers?

I really like the tesla UMC because it can charge from 220v 10a and also 400v 16a depending on the plug.
Click to expand...
You must have a Gen1 UMC as later models seemingly are only single phase. It usually doesn’t matter which order you do what on a type 2 but then the MG5 doesn’t seem to like Tesla very much. So maybe try the CCS approach:

1. Connect the UMC to mains (but don’t power it)
2. Make sure you don’t have a charge limit/schedule set
3. Turn off/lock the MG5
4. Unlock the car
5. Plug in the UMC
6. Wait until the car locks again
7. Power UMC
8. Wait….
9. If nothing happens, start charging with the app or in-car
 
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MickeySw said:
You must have a Gen1 UMC as later models seemingly are only single phase. It usually doesn’t matter which order you do what on a type 2 but then the MG5 doesn’t seem to like Tesla very much. So maybe try the CSS approach:

1. Connect the UMC to mains (but don’t power it)
2. Make sure you don’t have a charge limit/schedule set
3. Turn off/lock the MG5
4. Unlock the car
5. Plug in the UMC
6. Wait until the car locks again
6. Power UMC
7. Wait….
8. If nothing happens start charging with the app or in-car
Click to expand...
Thanks for the fast reply.
I'm pretty sure i have the gen1 (type 2 has all the pins and it's at least from 2017)

What do you mean by connect the UMC to mains but not power it? (I don't think the UMC has a power switch right?)

I definitely try that approach (i usually have a charging limit set to 80 or 90%)

Thanks again for your help.
 
MickeySw said:
Yes, skip step 1 and plug it in @ 7.
Click to expand...
How long do you wait until you start the charging on the app?
So far i haven't had any success.
After the procedure and some waiting i han see the message "connected, not charging" on the instrument display. When I then try to start charging on the app after a while the message "failed" comes up on the app. When i try to start charging in the car, as soon as i open it, the charging port unlocks.

Thanks for any advice.
 
Try the “Tesla rapid charger hack”

“So I moved to a different stall did the same and after waiting 5 minutes still nothing, so put my thinking cap on and leaving the car plugged in I got back into the car and switched it on put it into ready mode then went in to the infotainment screen for the charge settings pressed start charging and it did less than a minute later.”
 
MickeySw said:
Try the “Tesla rapid charger hack”

“So I moved to a different stall did the same and after waiting 5 minutes still nothing, so put my thinking cap on and leaving the car plugged in I got back into the car and switched it on put it into ready mode then went in to the infotainment screen for the charge settings pressed start charging and it did less than a minute later.”
Click to expand...
I already tried to put the car in ready mode and it did start charging but after maybe 5-10 minutes it stopped. I haven't tried it with the steps above. Maybe this will work.

So does MG don't like tesla chargers in general or has my MG5 a defect?
 
Elio said:
So does MG don't like tesla chargers in general or has my MG5 a defect?
Click to expand...
Without an EVCC upgrade MG5s don’t to work with open Tesla superchargers (DC rapid charging, level 3).

Given your experience it looks like there is also an issue with UMC & MG5s (AC, Level 1) although the protocol used is completely different?

Is there a change if you run the UMC on 3 vs single phase supply?
Once charging has started, can you turn off the car and check if it interrupts the process?
 
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MickeySw said:
Without an EVCC upgrade MG5s don’t to work with open Tesla superchargers (DC rapid charging, level 3).

Given your experience it looks like there is also an issue with UMC & MG5s (AC, Level 1) although the protocol used is completely different?

Is there a change if you run the UMC on 3 vs single phase supply?
Once charging has started, can you turn off the car and check if it interrupts the process?
Click to expand...
I tried with 3 phase and it's the same. It looks like when it charges (with car on) it's a bit more reliable but still not usable.

What's the EVCC update? Is it software?
 
Last edited by a moderator:
Elio said:
I tried with 3 phase and it's the same. It looks like when it charges (with car on) it's a bit more reliable but still not usable.

What's the EVCC update? Is it software?
Click to expand...
Yes, a firmware update for the EVCC is required to work with Tesla supercharges (at least in UK/Ireland).

Not sure if it’s the same in mainland Europe, may be worth trying your MG5 on an open access Tesla DC supercharger?
 
MickeySw said:
Yes, a firmware update for the EVCC is required to work with Tesla supercharges (at least in UK/Ireland).

Not sure if it’s the same in mainland Europe, may be worth trying your MG5 on an open access Tesla DC supercharger?
Click to expand...
I tried a tesla supercharger yesterday. It didn't charge. I tried with the car in ready mode but it don't want to charge either. (I didn't start the charging from the display in the car though.

Is the EVCC a free update?
 
It was for me. I believe the issues many are facing, particularly with cost, relate to the older version, which you didn't get in Europe
 
Elio said:
I tried a tesla supercharger yesterday. It didn't charge. I tried with the car in ready mode but it don't want to charge either. (I didn't start the charging from the display in the car though.

Is the EVCC a free update?
Click to expand...
Depending on the version of the Supercharger, an upgraded MG5 needs to be either off (older Teslas) or in READY and start charging from the display in-car (newest additions with CC readers?)
 
MickeySw said:
Depending on the version of the Supercharger, an upgraded MG5 needs to be either off (older Teslas) or in READY and start charging from the display in-car (newest additions with CC readers?)
Click to expand...
So it only works with the update? (On or in ready)
 
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