Issue with AC charging/New CCU fitted (Phase One SE LR)

[tsedge]

I guess that has been MG's frame of mind all along, never admit anything is wrong and never admit it has happened before. At least they didn't brand it as a characteristic.

Those who have had the CCU replaced did they replace it with the same unit as originally fitted i.e. 11 kW 3 phase unit or the 7 kW single phase unit fitted to the later cars?

I believe it is like for like, although I have never tested 11kW AC charging to check. There was no change made to the charge port itself, the pins are all still there, but it is possible that it is limited to 7kW.

I must admit I can't really see the need for anything beyond 7kW with AC charging, or it is too quick overnight or during the working day!

 

[Ian Key]

I believe it is like for like, although I have never tested 11kW AC charging to check. There was no change made to the charge port itself, the pins are all still there, but it is possible that it is limited to 7kW.

I must admit I can't really see the need for anything beyond 7kW with AC charging, or it is too quick overnight or during the working day!

It'd be interesting to find out why they fail. Is it poor components, bad design or a software issue.

I seem to remember mine failed soon after I heated the cabin via the app while it was still attached to my charger for the first time.

 

[tsedge]

Usually it is component failure, eg Mosfets blowing up on the circuit board. There's some seriously high currents in a small package. That can happen because of design problems (overworked / temperatures) but it is more likely a bad batch: ie quality control issues.

There are companies now that can repair them, which is far cheaper than a replacement, but no OEMs seem interested in repair, everything is replace, replace, replace.

Software can contribute, eg by creating overworking or over-switching that leads to failure.

Given that these are failing many months in, it suggests to me it is premature component aging.