Harlequin
Standard Member
Hi, I got very little information from the dealership when I picked up my new MG ZS LR the other week. Can someone please advise how I can charge the battery past 80%, please?
I think it is commonly accepted by most, that long term exposure to rapid charging in general is not great for the long term battery health of you car.When I picked up my mg4 the dealer said you shouldn’t use rapid or ultra rapid for 100 per cent. Only slower such as home. I know the charge rate slows down from 80 to 100 but is there really any reason not to do that on something like Ionity 350?
Never charge to 100% on DC, for one it is likely to affect the long term life of the battery but most importantly no-one should be hogging a rapid to charge to full battery especially as the charge rate falls at the top end. Charge to the percentage you need then move on to allow someone else the opportunity to top up.When I picked up my mg4 the dealer said you shouldn’t use rapid or ultra rapid for 100 per cent. Only slower such as home. I know the charge rate slows down from 80 to 100 but is there really any reason not to do that on something like Ionity 350?
It's more about long term battery health rather than the charger. Batteries last longer if used between the 20% to 80% margins. Rapid chargers will be throttled to protect the battery. They can go higher or lower, but over the years, the more often you go outside of these values, the greater the degredation.We have a SR MG5 and always charge up to 100% on our 7KW home charger. Does the advice to limit charge to 80% only really matter for rapid chargers?
Did you ask your dealer why?When I picked up my mg4 the dealer said you shouldn’t use rapid or ultra rapid for 100 per cent. Only slower such as home. I know the charge rate slows down from 80 to 100 but is there really any reason not to do that on something like Ionity 350?
The rapid charger has nothing to do with controlling the rate, this is done by the cars BMS. Different cars has different set ups, but most do start to reduce the rate considerably at around 80%.It's more about long term battery health rather than the charger. Batteries last longer if used between the 20% to 80% margins. Rapid chargers will throttle the charge to protect the battery. They can go higher or lower, but over the years, the more often you go outside of these values, the greater the degredation.
Only that you'd be hogging a charger! The 80-100% time could well be the same as 20-80% which is why you should avoid it especially if people are waiting.When I picked up my mg4 the dealer said you shouldn’t use rapid or ultra rapid for 100 per cent. Only slower such as home. I know the charge rate slows down from 80 to 100 but is there really any reason not to do that on something like Ionity 350?
Didn't say I wanted to do it - I don't. I was just checking the dealer advice which has been erroneous in other areas.Only that you'd be hogging a charger! The 80-100% time could well be the same as 20-80% which is why you should avoid it especially if people are waiting.
I think 'never' is a bit over the top.Never charge to 100% on DC, for one it is likely to affect the long term life of the battery but most importantly no-one should be hogging a rapid to charge to full battery especially as the charge rate falls at the top end. Charge to the percentage you need then move on to allow someone else the opportunity to top up.
Heat is the batteries major enemy number oneI think 'never' is a bit over the top.
The BMS will effectively slow the rate down once you get to 80%, and by the time you are 90% it's on a similar rate to an AC home charger anyway.
It's more about the speed and the fact it's faster to drive on until the next charger by the time you hit 80%.
I would agree. Having recently been on a long journey, I visited a local instavolt charger and charged from 18% to 94% in around 44 minutes. I went back the next morning to finish the charge off to 100% before heading home and the additional 6% took 36 minutes.I think 'never' is a bit over the top.
The BMS will effectively slow the rate down once you get to 80%, and by the time you are 90% it's on a similar rate to an AC home charger anyway.
It's more about the speed and the fact it's faster to drive on until the next charger by the time you hit 80%.
Agreed, a perfect example of hanging around until it hits 100% SOC is really not effective.I would agree. Having recently been on a long journey, I visited a local instavolt charger and charged from 18% to 94% in around 44 minutes. I went back the next morning to finish the charge off to 100% before heading home and the additional 6% took 36 minutes.
Which is what I do...if I can find oneWhen you get past 90% on a rapid you will probably find it is only charging at around 7kWh anyway. If you need 100% for your journey, you would be seen as a knight of the road if you moved to a 7kW AC fast charger instead.