Fast Charge 100%?

A

alwaysoverpar

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Hey all,
Newbie to the forum and to an EV.

Got my car as a lease through work, MG5 EV LR. Unfortunately I don't have a driveway or charging facilties at work so am living off public chargers - I am sure there is a thread somewhere about how amazing and reliable they are.

Anyway, I was wondering if its possible to charge beyond 95% on a fast charger, that 5% is fairly important given how I am travelling charger to charger, or if there is a particular wattage that I should be looking for that would get me to 100% the quickest.

thanks in advance
 
Hi and welcome, you may be getting confused with fast EVSE units and rapid chargers.
Fast AC Type2 will go to 100% and balance the battery.
Rapid DC CCS won't battery balance and best not to go into the 90% region
 
Jomarkh said:
Hi and welcome, you may be getting confused with fast EVSE units and rapid chargers.
Fast AC Type2 will go to 100% and balance the battery.
Rapid DC CCS won't battery balance and best not to go into the 90% region
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Appreciate your help, could you please help me understand the difference
 
The MG5 EV charges at around 6.6kw/h on a standard fast charge all the way up to 100% tailing off only after 99%. It is the best way to charge 90 to 100% or if left parked up unattended for a while. It uses a T2 connector.

A rapid charger uses a CCS connector and can charge at up to 94 kw/h slowly dropping off as the battery fills, with a big drop at around 75%. If you sit on a rapid at over 80% expect hassle from other EV drivers waiting to charge. After 90% the MG5 EV is known to have a hissy fit if still charging on a rapid and you may get a lock on or a system crash. No EVs like rapids above 90%. What you can do is disconnect the CCS and switch to the T2 cable at 90%. This allows others to rapid charge & you not to have a problem.

Whatever the rating of a T2 connector, 3kw, 7kw, 22kw or 43 kw/h they only charge the MG at 6.6 kw/h
 
Another point to note, it's often quicker to do multiple stops to charge in the car's "sweet spot" rather than one long stop all the way to 90%+ given how much the charge rate drops off around 80% (it's 83% on my car, others might be different). There are some graphs kicking about on the forum (for the ZS rather than MG5) which show how the charge rate varies with the car's SOC.

Download some apps such as ZapMap or ABRP, certainly ABRP allows you to vary the journey strategy for fewer/greater number of stops. Even on a long journey, I don't go above 83% unless there is a real lack of available chargers, and doubt I'd ever go above 90% even if there was no one waiting.
 
Wazzajnr said:
7kw fast will charge to 100% as will a rapid but the last few % will be much slower than the initial charge.
In your situation, you need to be grazing any chance you get.
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I agree it will be a very frustrating experience fr you if you treat it like a petrol/Diesel vehicle and expect to fill it up to full at the Electron pump. Grazing is best. Rapid chargers charge most Rapidly on most EVs between say 10% and 60% then hit the road again and when you've put on a few more miles take a toilet stop while the car charges.

It is an issue not having a home charger but if you can stick the car on a workplace charger, a Supermarket or Destination 7 kW charger or even at home or work on the Granny charger to charge to 100% once a month and then an hour or two more to "Balance" or "Equalise" your charge you'll continue to get the range out of the car you do today. If you don't then your range will progressively decrease.
 
BarryH said:
I agree it will be a very frustrating experience fr you if you treat it like a petrol/Diesel vehicle and expect to fill it up to full at the Electron pump. Grazing is best. Rapid chargers charge most Rapidly on most EVs between say 10% and 60% then hit the road again and when you've put on a few more miles take a toilet stop while the car charges.
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That sort of implies that you are limiting your range to 50% - say 100 miles - on a long trip (except for the last leg to a destination charger/home) . A toilet stop every hour and a half ?
 
To the OP, just to be clear, with an MG5 on a rapid DC charger (as others have said, the correct terminology for DC, (CCS connector) charging) you cannot charge to 100%. It will disconnect charging at 95% and display HV battery disconnected. If you get this when in the car, don't freak out, just make sure the car is switched off, disconnect the charger, replace the rubber bungs, close charge door. Then when you start the car as normal, all will be good and off you go! To charge to 100% you need to be connected to an AC charger, either slow (aka granny) or fast (upto 22kw AC), though as others have said, basically the fastest an MG5 can charge on AC is around 7Kw due to limitation of on board AC charger.;) So a public AC charger will get you to 100%, whilst (as others have said) carrying out a battery cell balance(y)
 
BigBear said:
To the OP, just to be clear, with an MG5 on a rapid DC charger (as others have said, the correct terminology for DC, (CCS connector) charging) you cannot charge to 100%. It will disconnect charging at 95% and display HV battery disconnected. If you get this when in the car, don't freak out, just make sure the car is switched off, disconnect the charger, replace the rubber bungs, close charge door. Then when you start the car as normal, all will be good and off you go! To charge to 100% you need to be connected to an AC charger, either slow (aka granny) or fast (upto 22kw AC), though as others have said, basically the fastest an MG5 can charge on AC is around 7Kw due to limitation of on board AC charger.;) So a public AC charger will get you to 100%, whilst (as others have said) carrying out a battery cell balance(y)
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Due to the slow down I wouldn't recommend it, but categorically on at least 2 occasions I have left a rapid charger at 100% mg5sr
 
Dt99idr said:
Due to the slow down I wouldn't recommend it, but categorically on at least 2 occasions I have left a rapid charger at 100% mg5sr
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Interesting........ Wonder if that's another difference between the SR & LR........ Like the OP, I have an LR and it disconnects from the rapid at 95%, so categorically will not charge to 100%, certainly not on the rapid DC chargers that I have used. (Evolt)
 
Paul Mason said:
I have the SR and have no problem charging to 100% on DC, on PodPoint, Instavolt and Gridserve
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That's useful to know if we ever need to. SWMBO's 5 has never seen a rapid charger but the one we might use and I have used with the ZS, is rarely used anyway, so there's usually no queue.
 
If you're charging to 100% on DC you should be aware that a lot of people are going to get annoyed with you. Because it takes so long to do the last 20% folk normally quit the charger at 80 or there abouts.

Also, if you are travelling from charger to charger you should not have any problems topping up?
 
EVsince2016 said:
The MG5 EV charges at around 6.6kw/h on a standard fast charge all the way up to 100% tailing off only after 99%. It is the best way to charge 90 to 100% or if left parked up unattended for a while. It uses a T2 connector.

A rapid charger uses a CCS connector and can charge at up to 94 kw/h slowly dropping off as the battery fills, with a big drop at around 75%. If you sit on a rapid at over 80% expect hassle from other EV drivers waiting to charge. After 90% the MG5 EV is known to have a hissy fit if still charging on a rapid and you may get a lock on or a system crash. No EVs like rapids above 90%. What you can do is disconnect the CCS and switch to the T2 cable at 90%. This allows others to rapid charge & you not to have a problem.

Whatever the rating of a T2 connector, 3kw, 7kw, 22kw or 43 kw/h they only charge the MG at 6.6 kw/h
Click to expand...
That is the first time I have heard of MG5 EVs having a "hissy fit" if charging on a rapid beyond 90%. So far it has never happened to me.

And feel free to ignore any other EV driver who wants to hassle you re the charger you are on. You do what is best for you. If you need to maximise your charge then do so.

Also I don't see how a T2 connector, rated at 3kw, can charge at 6.6 kw/h.

Finally, enjoy your car. As it is a lease car, I suspect you don't need to concern yourself too much re the long term health of the battery.
 
The drop off at 75% is a bit over stated too. I guess it depends if using one of the more common (near me anyway) Rapid 50kW units which allow 45kWh all the way to 83% (some people say 80%), where it then drops - or an Ultra Rapid that allows the car to charge at 90kWh+ (it may be a theoretical 100kWh - not entirely sure anymore!)
 
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