Public charger drops voltage drastically. Educate me, please

[HughJazzol]

While charging at a charger that charges but doesn't charge money for it, I saw this drop on my charge point screen. Why?

Did I reach 80%, and thus it drops to a slower charge? I have the target set to 95%.

Thank you

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[GreaseMonkey]

While charging at a charger that charges but doesn't charge money for it, I saw this drop on my charge point screen.

I think you exceeded the max number of allowed “c” word usage in a sentence by a long shot ?.

There could be many reasons why. We can speculate, but that won’t be helpful.

 

[devmach-e]

Does the charging station have two cords attached to it? If so, it is probably on a shared circuit. If only one EV is plugged in, it gets the full 6 kW. If a second EV plugs in, each car gets 3 kW. As soon as the second car disconnects, your car gets the full 6 kW.

 

[HughJazzol]

Does the charging station have two cords attached to it? If so, it is probably on a shared circuit. If only one EV is plugged in, it gets the full 6 kW. If a second EV plugs in, each car gets 3 kW. As soon as the second car disconnects, your car gets the full 6 kW.

Thank you Dave
It has 2 cords yes, and 2 of us were there charging from the beginning. But, another car could have come in at that time of the drop and started fresh.

Noted.

P. S.. Is there a way to have the ac always come on in recirculate mode?

 

[jmcbrew]

I don’t want to be “that guy,” but I’m going to do it anyway. Your voltage didn’t drop. The amperage dropped. The kilowatts dropped from around 6 to around 3. That probably means you were at a 30 to 32 amp EVSE at 208 to 240 volts, and it was supplying full amperage… then it dropped to half. As @devmach-e said, you were probably sharing with another car at that point.

 

[rhougey]

Does the charging station have two cords attached to it? If so, it is probably on a shared circuit. If only one EV is plugged in, it gets the full 6 kW. If a second EV plugs in, each car gets 3 kW. As soon as the second car disconnects, your car gets the full 6 kW.

I believe David has your answer here. A second person plugged in. A long time ago I tried using free, publicly located, time limited level 2 stations on a couple of occasions. The experience was so slow and unsatisfying that I don’t even give them a thought anymore.

 

[HughJazzol]

I don’t want to be “that guy,” but I’m going to do it anyway. Your voltage didn’t drop. The amperage dropped. The kilowatts dropped from around 6 to around 3. That probably means you were at a 30 to 32 amp EVSE at 208 to 240 volts, and it was supplying full amperage… then it dropped to half. As @devmach-e said, you were probably sharing with another car at that point.

You are correct, the amperage dropped, and I meant to say that.

 

[ocdxfv]

My last session at ChargePoint. Another car joined me and we got to share the juice.

 

[AliRafiee]

Don’t look a gift horse in the mouth. ? ?

 

[HughJazzol]

for the record, I have been at this same charger, with another car charging alongside mine, and the amperage never dropped and stayed up there at 6kw.

 

[rhougey]

for the record, I have been at this same charger, with another car charging alongside mine, and the amperage never dropped and stayed up there at 6kw.

Is it possible that on these occasions the other car may be plugged in but not actually charging?

 

[HughJazzol]

Is it possible that on these occasions the other car may be plugged in but not actually charging?

Yes it is, of course. But I could see the 2 stands showing "Charging" with the car animation moving

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