Question about Charge Point Installation
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2025 EQS580
Question about Charge Point Installation
The wall mounted Charge Point Flex unit was installed today in my garage. The electrician informed me that the electrical box is capable of 60 amps. I informed him that most folks have a box capable of 50 amps but the car will charge at 40 amps. He said that’s not a problem. Does this mean that since he made it so it’s capable of 60 amps, it will charge at 50 amps or will the Charge Point charge at 40 amps no matter what?
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From: NM
2023 AMG EQS
The wall mounted Charge Point Flex unit was installed today in my garage. The electrician informed me that the electrical box is capable of 60 amps. I informed him that most folks have a box capable of 50 amps but the car will charge at 40 amps. He said that’s not a problem. Does this mean that since he made it so it’s capable of 60 amps, it will charge at 50 amps or will the Charge Point charge at 40 amps no matter what?
If your electrician installed a 60amp circuit and the Chargepoint is Hardwired then you should be able to safely charge up to 48amps.
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The Changepoint will be able to charge up to 50amps when hardwired. If you use a the14-50 plug then it will only be able to go up to 40amps. On a 60 amps circuit you can safely go up to 80% of 60amps so therefore you should only go to 48amps if its hardwired.
If your electrician installed a 60amp circuit and the Chargepoint is Hardwired then you should be able to safely charge up to 48amps.
If your electrician installed a 60amp circuit and the Chargepoint is Hardwired then you should be able to safely charge up to 48amps.
The wallbox cannot be prepared for a specific car which is why the wallbox and the car need to "negotiate on the safe charge current". The wallbox must be set to a max current capability that is safe for long term charging (from the fixed side point of view).
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You are considering the safety at the chargepoint side? The OP seemed to be concerned about the charge current from the car point of view. Don't know anything about the US electricity safety issues but nothing to be concerned from the car point of view. As said already, the AC charging level is controlled by the car, within the wallbox capability limits, the lower one will be selected. One can further reduce the max current from the MBUX settings if preferred.
The wallbox cannot be prepared for a specific car which is why the wallbox and the car need to "negotiate on the safe charge current". The wallbox must be set to a max current capability that is safe for long term charging (from the fixed side point of view).
The wallbox cannot be prepared for a specific car which is why the wallbox and the car need to "negotiate on the safe charge current". The wallbox must be set to a max current capability that is safe for long term charging (from the fixed side point of view).
If OP should one day want to charge greater than 48amps then the circuit will need to be upgraded.
Does this mean that since he made it so it’s capable of 60 amps, it will charge at 50 amps or will the Charge Point charge at 40 amps no matter what?
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The electrician told OP that information so that OP would know that the maximum charging that should be done on that circuit is 80% of 60amps which is 48. That is vital information to know for safety's sake. If one day in the future OP buys a new car and a new wallbox that is capable of charging at 70amps, now OP knows that even though the capability is there, it is not safe to charge any higher than 48amps.
If OP should one day want to charge greater than 48amps then the circuit will need to be upgraded.
The answer to the original question; the car can charge at a maximum 48amps if the Chargepoint Home Flex is hardwired and 40amps if the Chargepoint Home Flex is socketed. This is all controlled by the Chargepoint app, it will ask you the Breaker amperage and if its a plug-in or hardwire installation.
If OP should one day want to charge greater than 48amps then the circuit will need to be upgraded.
The answer to the original question; the car can charge at a maximum 48amps if the Chargepoint Home Flex is hardwired and 40amps if the Chargepoint Home Flex is socketed. This is all controlled by the Chargepoint app, it will ask you the Breaker amperage and if its a plug-in or hardwire installation.
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From: NM
2023 AMG EQS
Yes the car will only charge at a maximum of 40amps because the Chargepoint will only supply 40amps maximum.
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NO. The car charger is 9.6 kw. It will pull a maximum of 32 amps. NO WORRIES. Plug and go.If we had been equipped with the eurospec 11kw charge, you could have used the whole 40. Think of it as a very large safety factor🤣
Last edited by c4004matic; Jan 26, 2022 at 11:38 PM.
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Remember though that the Euro charger is a 3-phase charger. Makes 16A "only" per wire (240 V) for a total of 11 kW.
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This brings me to another question. If I charge the car overnight, does it stop charging at 80% charged? Why wouldn’t it charge to 100%? Is that a no-no for the batteries?
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On the EQS (and I guess latest PHEVs too) you can set the maximum charge level from MBUX menus. Limiting it to 80% is healthy for the battery life. If full charge is needed, best if the battery is charged just before the journey.
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The EQS, through the software and the Mercedes Me app, has three charge programs. I have set one to go to 100%, which would only be used the night before a trip. The one I regularly use is set to 80%. I plug the ChargePoint in and follow along on the MercedesMe app as the car charges. I do not use the ChargePoint app, except for information if I need it. My car charges (40amp circuit) at 7.7kw, and the car shuts itself off when it reaches 80%, then the app sends me a message that it is fully charged. Very clean and simple operation. Hope this helps.
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7.2kW is 32A (assuming 240v of course....)
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The wall mounted Charge Point Flex unit was installed today in my garage. The electrician informed me that the electrical box is capable of 60 amps. I informed him that most folks have a box capable of 50 amps but the car will charge at 40 amps. He said that’s not a problem. Does this mean that since he made it so it’s capable of 60 amps, it will charge at 50 amps or will the Charge Point charge at 40 amps no matter what?
Even if your EVSE is capable of supplying more than 40 amps......the car will only draw up to that 40A limit.
When you set up the CPHF in your app, it is critical that you tell the truth. Do not say it is hardwired on a 60A circuit if in fact it is plugged into a 50A receptacle because then you may have a problem if you attempt to charge an EV with a larger on board charger (such as the Ford Mach-E).
