AC charging
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I think so, though it may not take advantage of all that extra power for example ac charging power would still be limited to 7.4kW compared to 1 phase:
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Mercedes-Benz EQC (2019) Charging Guide | Pod Point
The complete guide to charging your Mercedes-Benz EQC (2019), covering electric range, how long it takes to charge, how much it costs, and much more.
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Thank you for info! I was just wondering, because I have installed EASEE charging box at home (3 phase, 32 amps, 11 kw), but only get constant 4.2 kwh charging speed. So was wondering what is the problem. Could it be the included original Mercedes cable weirdly ranked at 20 amps? Something else?I think so, though it may not take advantage of all that extra power for example ac charging power would still be limited to 7.4kW compared to 1 phase:
Mercedes-Benz EQC (2019) Charging Guide | Pod Point
The complete guide to charging your Mercedes-Benz EQC (2019), covering electric range, how long it takes to charge, how much it costs, and much more.
I am no expert on this but some people seem to be having a similar problem even with 1 phase-
www.mbeqclub.com
Possible ideas to try-
Check other installs, like if you can charge 7.4kw at public ac chargers, especially with your own cable.
Check the ac charging cable, that you are using to connect the wall box to the car. Might be a 16amp/(20amp?!) cable instead of a 32amp triphase one which should be available from Mercedes.
Check other cars, like if you have access to another electric car, check it can make use of the extra power in your new installation, or perhaps the electrical installer can verify the install.
Check car settings, like Mercedes recommends check the maximum charging current settings in the multimedia systrm menu. Check set to maximum, not 8 amp or less.
Check the charging equipment, such as wall box and ancillary load balance devices, as they could be regulating the power to protect the circuit such as if they are setup for or detect there is a low capacity fuse.
The more info the better, to give to Mercedes Me support or dealer might have an ac charger to verify too. Be interesting to know what Mercedes find.
EQC single phase charging
Hi! My MY20 EQC is not able to handle 32A from a single phase wall charger, although other Mercedes hybrid to this nicely. More, other EQC owners are getting 32A (7.4 kW) from the single phase charger. Asked the dealership, but anything more complex than a spark plug they can’t process. So no...
www.mbeqclub.com
Possible ideas to try-
Check other installs, like if you can charge 7.4kw at public ac chargers, especially with your own cable.
Check the ac charging cable, that you are using to connect the wall box to the car. Might be a 16amp/(20amp?!) cable instead of a 32amp triphase one which should be available from Mercedes.
Check other cars, like if you have access to another electric car, check it can make use of the extra power in your new installation, or perhaps the electrical installer can verify the install.
Check car settings, like Mercedes recommends check the maximum charging current settings in the multimedia systrm menu. Check set to maximum, not 8 amp or less.
Check the charging equipment, such as wall box and ancillary load balance devices, as they could be regulating the power to protect the circuit such as if they are setup for or detect there is a low capacity fuse.
The more info the better, to give to Mercedes Me support or dealer might have an ac charger to verify too. Be interesting to know what Mercedes find.
3 phase 32A is 22kW. Are yous sure it's not 3 phase 16A, as that would be 11kW? Post a photo of the circuit breaker and we might be able to tell.
Another possibility: others here have reported low AC charging rates on early EQCs that were fixed by a firmware update to the car.
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Thanks a bunch! I have ordered another cable from Easee 32A - will see how that goes.I am no expert on this but some people seem to be having a similar problem even with 1 phase-
EQC single phase charging
Hi! My MY20 EQC is not able to handle 32A from a single phase wall charger, although other Mercedes hybrid to this nicely. More, other EQC owners are getting 32A (7.4 kW) from the single phase charger. Asked the dealership, but anything more complex than a spark plug they can’t process. So no...
Possible ideas to try-
Check other installs, like if you can charge 7.4kw at public ac chargers, especially with your own cable.
Check the ac charging cable, that you are using to connect the wall box to the car. Might be a 16amp/(20amp?!) cable instead of a 32amp triphase one which should be available from Mercedes.
Check other cars, like if you have access to another electric car, check it can make use of the extra power in your new installation, or perhaps the electrical installer can verify the install.
Check car settings, like Mercedes recommends check the maximum charging current settings in the multimedia systrm menu. Check set to maximum, not 8 amp or less.
Check the charging equipment, such as wall box and ancillary load balance devices, as they could be regulating the power to protect the circuit such as if they are setup for or detect there is a low capacity fuse.
The more info the better, to give to Mercedes Me support or dealer might have an ac charger to verify too. Be interesting to know what Mercedes find.
And I will see what speed is charging at some public chargers or dealership - all good ideas!
Yes it is something interesting to try though I'd be surprised if cable supplied with car isn't powerful enough, though the 32amp triphase one is more future proof and designed specifically for the power now installed and may help charge faster other cars that use the charger and will mean you can leave one cable at home while having another spare in the car and you have the option of choosing a different length too. I have 2 cables though only use a 32 amp replacement one, though for a different reason which is because it was 8m instead of the too-short 4m that was ridiculously curly and came with car. I see newer cars come with 5m cable that is not curly, and which would have been just about perfect length for me. Interesting to hear what eventually solves the issue
I reckon the 32A cable will almost certainly get you back up to 7.4kW.
There are two current limits, and the car will use whichever is lower. The EVSE (aka wall-box) tells the car how much current it can draw via a PWM signal. That value is set by dipswitches inside the EVSE by your installer. Yours is most likely set to 32A since you've got a 3x32A ganged circuit breaker upstream. In addition, the cable that runs between the EVSE and the car also reports to the car how much current it can carry, via a resistor on the Proximity contact. Yours will be reporting 20A, so the car will choose the lesser of 32A and 20A.
My home EVSE has a hardwired cable and its rated for 32A, so I get the full 7.4kW charging. You inspired me to check the cable that came with the car, and like yours it's only rated for 20A. I rarely use that cable, and only when out and about where it's connected to 22kW 3-phase AC chargers. My 2021 EQC can do 3-phase charging but only at 11kW which is 230V * 16A, so the 20A cable is a good match for that, but it's restrictive when you're trying to charge via a single phase. You are effectively single phase, even though your house and EVSE are all 3-phase, your early EQC can only use one.
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So got the 32A cable and problem solved - steady 7.4 kW! I am mesmerised why would Mercedes include cable they know doesn't work and also how uneducated dealerships are about things like charging and electrical setups. Thanks god, we have forums like this and people who take time to help the others! Cheers!
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Just to clarify a point for charging in certain countries, regulations restrict the maximum current pulled from a single phase.
In Germay, that limit is 20A (32A if pulling from all three phases)
Austira, Netherlands, and Switzerland will limit you to 16A on a single phase.
This is to make sure the grid is balanced (likely some infrastructure architecture that leads to the requirement)
I hope everyone selects a decent charge cable in a case where nothing is provided by the OEM...
Can't wait to give an EQS a test drive.
In Germay, that limit is 20A (32A if pulling from all three phases)
Austira, Netherlands, and Switzerland will limit you to 16A on a single phase.
This is to make sure the grid is balanced (likely some infrastructure architecture that leads to the requirement)
I hope everyone selects a decent charge cable in a case where nothing is provided by the OEM...
Can't wait to give an EQS a test drive.
Thanks, that probably goes a long way towards explaining why they put a 20A cable in the boot.
The MB supplied EVSE comes with a 32A tethered cable, avoiding the 20A limit of the cable in the boot. Then it's up to the installer to set the dip-switches to comply with the local regulations, 32A in my case: single phase, controlled load.
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Exact same limits here in Queensland, with the exception that if you make it a "controlled load" they'll let you draw 32A single phase. Controlled loads can't be used during two small peak windows (7am to 9am and 6pm to 7:30pm). I guess balance isn't so critical when transformers aren't running close to their limits.
The MB supplied EVSE comes with a 32A tethered cable, avoiding the 20A limit of the cable in the boot. Then it's up to the installer to set the dip-switches to comply with the local regulations, 32A in my case: single phase, controlled load.
Yep, the on-board AC charger in the EQC is an 11kW charger (and smaller on the pre 2021 models).
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