Experience of 11kW onboard charger issues

[Bennachie]

Googled a lot and have found some information but looking for real world experience on here.
Two days after a heater replacement, I plugged in to recharge my battery.
The following morning my garage breakers have tripped and the requested charge has not quite achieved its target.
Breakers re-set and plug in RCBO immediately trips. I have a Porsche Mobile charger so plug that into the three pin socket on (obviously) a different circuit. Immediately on plugging the PMC turns all light red and trips. Light sequence suggests residual current detected.
Car drives Ok. P Assist finds 'loads of codes' and arranges the usual 'stuff'. Car now at the OPC and the XC60 is underwhelming especially as the headlights are worse than 1960s bicycle lamps.
Thoughts/experience would be welcome.
12v battery WSS6 and Charger WSS4 just completed.
I was hoping to be less evident on this Forum in '26...

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[Tooney]

If breakers tripped, likely your Taycan's onboard charger has failed and needs to be replaced.

(Thanks for your continuing forum participation... )

 

[Bennachie]

Thanks tooney, that is what my searching has suggested................ grrr. Nearly two years of trouble free thoroughly enjoyable motoring, now three things in a month.

 

[Tooney]

My 11 kw OBC blew and tripped breaker about a year after delivery of my 22 4S. I tried a couple of other AC EVSE units at other locations and had problems with them all. No problems since OBC was replaced.

 

[Dick G]

If breakers tripped, likely your Taycan's onboard charger has failed and needs to be replaced.

(Thanks for your continuing forum participation... )

My onboard charger replacement was $7000.00. That's why I love warranties.

 

[Bennachie]

Now, the 'wet' heater is situated directly above the OBC and its multi plugs...


Not my pic.

 

[snstevens]

Now, the 'wet' heater is situated directly above the OBC and its multi plugs...


Not my pic.


View attachment 88318

So I'm assuming the OBC is the silver box with the A20 on it? If not then the black box above it?

 

[Bennachie]

Sorry, meant to annotate. Black box is heater with insulating cover; silver box is OBC. The heater hose connectors are directly above the OBC connectors...

 

[Taycan4S_UK]

Funnily enough my braker tripped last week at 83% (I set at 85%). This only the second time in 14 months.

 

[Bennachie]

Spooky, same settings. Two years no issues with EVSE then... this.

 

[prj]

Now, the 'wet' heater is situated directly above the OBC and its multi plugs...

The multiplugs and the OBC are at the bare minimum IP65, so no problem there.

 

[Bennachie]

The multiplugs and the OBC are at the bare minimum IP65, so no problem there.

That is good to know.
Thank you.
My problem is I do not believe in coincidence. In this case I shall just have to subscribe to the 'these things happen' school of thought.

Phone call just now confirms the death of my OBC. Off road part order so hopefully Wednesday/Thursday return. Apparently it is not a quote 'big job'.. You will know more about this.

 

[prj]

That is good to know.
Thank you.
My problem is I do not believe in coincidence. In this case I shall just have to subscribe to the 'these things happen' school of thought.

Phone call just now confirms the death of my OBC. Off road part order so hopefully Wednesday/Thursday return. Apparently it is not a quote 'big job'.. You will know more about this.

The OBC's die if you breathe funny, there's defects inside.
You could submerge it and there would be no issues. For sure the problem is not liquid ingress, no need to make things up.

Did you know that certain BMW's in the past had their ECU's liquid cooled? With coolant running right through the DME?

 

[Bennachie]

Actually, yes; dielectric fluid is clever stuff. Many data centres now run submerged cooling 'computers'.


On a different topic, you don't happen to know how to get the arm cover off the Tourismo rear wiper arm by any chance?

 

[prj]

Actually, yes; dielectric fluid is clever stuff. Many data centres now run submerged cooling 'computers'.

It's not dielectric anything, just normal coolant
Never heard of any of them failing either. There's cooling passages in the heatsink.

On a different topic, you don't happen to know how to get the arm cover off the Tourismo rear wiper arm by any chance?

No, but I will find out soon because I ordered the shiny one for my new Taycan.

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