[ketrab]

Took delivery November.

Just installed 30A Charger by Siemens on 50A circuit. BMW has limit set at 16A in the settings.

I've noticed that about 97% the BMW shutoff charging throwing that message.

This is my first time charging level 2 at home. Anybody with similar issue that could share his thoughts?



PS. Been charging using the 10A before (using included charger) at 6A without any issues. Should I perhaps change the settings in the car to minimum 6A and let it decide?

[jad03060]

Any error indication on the EVSE?

If you plug into the unit that came with it, does it charge?

Have you tried removing the plug and reinserting it?

Are you sure you have a good ground in the wiring to the EVSE?

Are the connections tight?

[ketrab]

Originally Posted by jad03060

Any error indication on the EVSE?

If you plug into the unit that came with it, does it charge?

Have you tried removing the plug and reinserting it?

Are you sure you have a good ground in the wiring to the EVSE?

Are the connections tight?

No errors on the EVSE - just showed green as it was fully charged

The unit that came with it I didn't have any problems.

I did reinsert the plug and no errors, it actually finished charging to 100%

Ground (white/neutral) is there in there patched to receptacle.

Connection tight? Well its like plug and play I didn't really pay attention.

I'm going to try to lower the car settings back to 6A tomorrow and recharge and see what happens.

[jad03060]

A typical 240vac EVSE has no neutral connection...just L1, L2 and ground for safety (at least in the USA).

[ketrab]

Originally Posted by jad03060

A typical 240vac EVSE has no neutral connection...just L1, L2 and ground for safety (at least in the USA).

It’s the same thing*. Neutral on your main panel is grounded.

[Spencer518]

Originally Posted by jad03060

A typical 240vac EVSE has no neutral connection...just L1, L2 and ground for safety (at least in the USA).

A plug-in EVSE will have 4 wires running to the outlet, if it's a 14-50 plug. OP mentions a receptacle, so I think it's plugged in.

[ketrab]

Originally Posted by Spencer518

A plug-in EVSE will have 4 wires running to the outlet, if it's a 14-50 plug. OP mentions a receptacle, so I think it's plugged in.

Mine is 6-50R so 3 wires. Spencer have you ever had this issue on your 45e? Also what are your settings as far as the max amp setup in the car?!

[Spencer518]

Originally Posted by ketrab

Mine is 6-50R so 3 wires. Spencer have you ever had this issue on your 45e? Also what are your settings as far as the max amp setup in the car?!

I haven't had any problems charging. I set the car to 16 amps when I first got it home and it has remained on that setting. I'm using a Chargepoint Flex EVSE with a 50 amp circuit. The EVSE will put out a max of 40 amps, but when it communicates with the X5 it automatically drops to 16 amps. We're planning to get a full EV as our 2nd car next year so I wanted something that will work with both cars. I'm using the charge immediately settings in the car. Haven't had a need to schedule the charging, so that could be a difference if you are using scheduling.

[ketrab]

Originally Posted by Spencer518

I haven't had any problems charging. I set the car to 16 amps when I first got it home and it has remained on that setting. I'm using a Chargepoint Flex EVSE with a 50 amp circuit. The EVSE will put out a max of 40 amps, but when it communicates with the X5 it automatically drops to 16 amps. We're planning to get a full EV as our 2nd car next year so I wanted something that will work with both cars. I'm using the charge immediately settings in the car. Haven't had a need to schedule the charging, so that could be a difference if you are using scheduling.

Thanks, no scheduling just immediate. I'm also running on 50 amp but my Siemens Charger is 30 amp capable. I had it changed to 16 amps in the car when I got home but I remember when I was pickup up the car at the dealer they had it plugged in into chargepoint and I saw drawing 16a but settings in the car were 6a.

[ketrab]

Also would it be advisable to change the Amperage on the Charger? I.e if mine can go max at 30a but 45e only does 16a. Technically you are still "pushing" 30 amp at the EV and its controller or whatever on the ev to adjust to 16 amp only.

[Spencer518]

If you have no need for your EVSE to output more than 16 amps and you can adjust it down to that, I would give it a try.

[ketrab]

Originally Posted by Spencer518

If you have no need for your EVSE to output more than 16 amps and you can adjust it down to that, I would give it a try.

Ok to summarize your setup. You have 40A charger pushing max, your car is setup to 16A in settings so the car scales down from 40A to 16A automatically. No scheduling but immediate.

[ketrab]

45e owners out there. Can you share your experience?

[Spencer518]

Originally Posted by ketrab

Ok to summarize your setup. You have 40A charger pushing max, your car is setup to 16A in settings so the car scales down from 40A to 16A automatically. No scheduling but immediate.

I think the EVSE scales down the power before the power is sent to the car. The car sends its amperage setting to the EVSE for this to happen. At least that's my understanding of how it works.

[ketrab]

Originally Posted by Spencer518

I think the EVSE scales down the power before the power is sent to the car. The car sends its amperage setting to the EVSE for this to happen. At least that's my understanding of how it works.

I doubt it. Reason why some units come with Amperage Adjustments EVSE will push its max or whatever is set for(dumb devices). Its the car onboard to scale down.

[Spencer518]

One of the pins in the SAE J1772 is for communication between the car and the EVSE

[ketrab]

Originally Posted by Spencer518

One of the pins in the SAE J1772 is for communication between the car and the EVSE

What software/firmware you are running on your 45e? Not sure how to even check for it.

[jad03060]

The EVSE is primarily a smart on/off switch. It announces to what's attached how much power it has, but otherwise, does not control the power through it except through the safety interlocks. Think of it like you have a 15A circuit, and you plug your phone charger in that might draw 10W...in the case of the EVSE, because it's smarter and the vehicle is, too, the vehicle won't try to draw more power than the thing says it has. Just like when you plug the supplied unit into the vehicle...it can only supply 10A, but the vehicle could use 16A...it works fine because the vehicle won't try to pull more than that from it. Now, if it wasn't smart, you'd overload the EVSE, and that might also overload the circuit breaker feeding that.

I don't remember the range the pilot signal has that's sent to the vehicle (I think the current max is 80A), but you could have a much larger EVSE than the X5 can use, and they'd co-exist just fine. All the vehicle cares about is not overloading the EVSE...otherwise, it will use what it can for the current conditions (state of charge, temperature, etc.).

The only reason the vehicle has the ability to restrict how much power it can draw is if the EVSE is sharing its circuit with something else, and the combined load would trip the breaker feeding it, like say in the garage, you plug it into the same circuit that's feeding your garage door opener.

The only reason you might want to adjust the EVSE (not many can be) is if you say had a unit capable of 40A, but it was not on a 50A circuit (80% rule applies). If that circuit was say a 40A circuit, and you could adjust it to a max of 32A, that would protect the wiring feeding it and abide by the electrical codes, but now be telling the attached vehicle it could only supply 32A versus it's real maximum (when wired as such) 40A.

[moodyhank82]

After installing the latest software update, I did get a few errors including the unable to charge one. After a hard reboot of iDrive system, everything returned to normal. Long shot but maybe that it is what is happening to you too?

[Spencer518]

Originally Posted by ketrab

What software/firmware you are running on your 45e? Not sure how to even check for it.

07/2020.54

[ketrab]

Originally Posted by jad03060

The EVSE is primarily a smart on/off switch. It announces to what's attached how much power it has, but otherwise, does not control the power through it except through the safety interlocks. Think of it like you have a 15A circuit, and you plug your phone charger in that might draw 10W...in the case of the EVSE, because it's smarter and the vehicle is, too, the vehicle won't try to draw more power than the thing says it has. Just like when you plug the supplied unit into the vehicle...it can only supply 10A, but the vehicle could use 16A...it works fine because the vehicle won't try to pull more than that from it. Now, if it wasn't smart, you'd overload the EVSE, and that might also overload the circuit breaker feeding that.

I don't remember the range the pilot signal has that's sent to the vehicle (I think the current max is 80A), but you could have a much larger EVSE than the X5 can use, and they'd co-exist just fine. All the vehicle cares about is not overloading the EVSE...otherwise, it will use what it can for the current conditions (state of charge, temperature, etc.).

The only reason the vehicle has the ability to restrict how much power it can draw is if the EVSE is sharing its circuit with something else, and the combined load would trip the breaker feeding it, like say in the garage, you plug it into the same circuit that's feeding your garage door opener.

The only reason you might want to adjust the EVSE (not many can be) is if you say had a unit capable of 40A, but it was not on a 50A circuit (80% rule applies). If that circuit was say a 40A circuit, and you could adjust it to a max of 32A, that would protect the wiring feeding it and abide by the electrical codes, but now be telling the attached vehicle it could only supply 32A versus it's real maximum (when wired as such) 40A.

Very good info thank You!

[jad03060]

For those that may be doing the s/w update, the notes do say that if it was plugged in and charging, it will report an error after the update is completed. To clear that, you have to remove and then reinsert the charging cable.

That probably isn't the issue here, but people coming to look for errors might be helped by this tidbit.