Is there any way to adjust the charging amperage?
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2023 Mercedes ESQ SUV 580 ● 2021 Volvo XC40 Recharge
Is there any way to adjust the charging amperage?
Is there any way to adjust the charging amperage? My previously owned Tesla and my currently owned Volvo allow for charging amperage adjustment. Does the EQS? I can't find anything in the software to accomplish this.
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AFAIK, the charger mounted onboard the EQS is a 9.5/6 kW charger. So, if presented with a 40amp supply line from a wall box, that is the charge rate. If presented with a lesser amperage, it will adjust. Now, I can change the amperage supply from my ChargePoint Homeflex wall box through the iPhone app. When I diminish the supply line to 32amps (as I did after my recent garage fire) the EQS charges at 7.7kW. Now, I have a new supply line capable of supporting a full 40 amps, and have turned the ChargePoint back to 40 amps, and now I am charging at 9.5kW. So, the onboard charger will adjust to your supply line, but I am not aware of any way to influence it's charge level otherwise.
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Just a bit odd that the first generation Mercedes PHEVs (before MB EVs appeared) had the option to adjust max charging current from the car. Perhaps confusing owners when the same adjustment can be found from two places. I still feel both both would be useful, for different needs. Not essential though.
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I went with the lowest common denominator for a 240V oultet, a 24 AMP Splitvolt EVSE with a NEMA 14-30 plug and 14-50 to 14-30 adapter. So I can just plug-in to just about anything and not have to worry about it. Plugged into the dryer outlet at my new house last night at around 9:30 PM with a 35% state of charge and unplugged this morning at 7:30 AM with a 95% state of charge. I personally don't see the need for more than 24 AMPs and I saved the cost of having to pay an electrician.
Last edited by GreasedFolgore; Jul 19, 2024 at 09:22 AM.
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Just a bit odd that the first generation Mercedes PHEVs (before MB EVs appeared) had the option to adjust max charging current from the car. Perhaps confusing owners when the same adjustment can be found from two places. I still feel both both would be usIneful, for different needs. Not essential though.
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AFAIK, the charger mounted onboard the EQS is a 9.5/6 kW charger. So, if presented with a 40amp supply line from a wall box, that is the charge rate. If presented with a lesser amperage, it will adjust. Now, I can change the amperage supply from my ChargePoint Homeflex wall box through the iPhone app. When I diminish the supply line to 32amps (as I did after my recent garage fire) the EQS charges at 7.7kW. Now, I have a new supply line capable of supporting a full 40 amps, and have turned the ChargePoint back to 40 amps, and now I am charging at 9.5kW. So, the onboard charger will adjust to your supply line, but I am not aware of any way to influence it's charge level otherwise.
The Chargepoint charger should not allow you to adjust the charging current above the allowed limit for the circuit. Usually, the allowed current will be set by the equipment installer to match the rated continuous load capacity of the circuit. The car will draw as much as it needs up to the limit, and may draw less depending on the battery state (i.e., charge level, temperature, etc.).
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The max AC charging power for us in Europe is 11 kW or 22 kW, option dependent.
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The charging combinations are quite extensive, and the maximum charging power varies considerably depending on the voltage and number of phases available. Summarizing as follows:
In the US most houses are supplied single phase 240 AC power, with both 240V and 120V circuits available.
120V/15A circuits are the most common, and allow a max charging current of 12A (to meet 80% continuous load limitations) or 1.44 kW.
120V/20A circuits are less common, but allow 16A or 1.92kW charging
240V circuits are usually 30A or 50A supporting Dyers, Ovens, and Air Conditioners. These would support 24A and 40A or 5.76kW and 9.6kW charging. However, J1772 standard allows charging currents as high as 80A , which would allow 19.2kW charging if the AC inverter in the car supported it.
Note that the above applies to both CCS1 and NACS (which uses the same control protocol) for AC charging.
In Europe, 240C three phase service is available to houses, which means three phase 240V or single phase 208V charging is available.
It appears the most common charging circuits are 16A or 32A at the voltages above. The standard allows up to 80A single phase and 63A three phase charging.
In the US most houses are supplied single phase 240 AC power, with both 240V and 120V circuits available.
120V/15A circuits are the most common, and allow a max charging current of 12A (to meet 80% continuous load limitations) or 1.44 kW.
120V/20A circuits are less common, but allow 16A or 1.92kW charging
240V circuits are usually 30A or 50A supporting Dyers, Ovens, and Air Conditioners. These would support 24A and 40A or 5.76kW and 9.6kW charging. However, J1772 standard allows charging currents as high as 80A , which would allow 19.2kW charging if the AC inverter in the car supported it.
Note that the above applies to both CCS1 and NACS (which uses the same control protocol) for AC charging.
In Europe, 240C three phase service is available to houses, which means three phase 240V or single phase 208V charging is available.
It appears the most common charging circuits are 16A or 32A at the voltages above. The standard allows up to 80A single phase and 63A three phase charging.
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If you have a 40A circuit, the maximum current you should draw is 80% of the rated current or 32A. In the US, the maximum sustained load allowed is 80% of the rated capacity, and EV charging is definitely a sustained load. You can draw the full capacity only temporarily. The only way it would be safe to draw 40A charging would be if you have a 50A circuit. Do you have a 50A circuit?
The Chargepoint charger should not allow you to adjust the charging current above the allowed limit for the circuit. Usually, the allowed current will be set by the equipment installer to match the rated continuous load capacity of the circuit. The car will draw as much as it needs up to the limit, and may draw less depending on the battery state (i.e., charge level, temperature, etc.).
The Chargepoint charger should not allow you to adjust the charging current above the allowed limit for the circuit. Usually, the allowed current will be set by the equipment installer to match the rated continuous load capacity of the circuit. The car will draw as much as it needs up to the limit, and may draw less depending on the battery state (i.e., charge level, temperature, etc.).
