DC Charging speed

[MGPHOAWR]

I'm not convinced my MG4 ER is hitting the speeds it should when rapid charging.

Today I plugged in at 35%. Ambient temperature 12°C but I had driven about 20 miles beforehand and I had on intelligent battery heating. Despite this the power never went above 67kW.

Surely they can't be normal? This was a 200kW charger and I've seen other cars getting well over 100kW on it.

 

[siteguru]

It wasn't a 200kW charger with 2 outlets, was it? And another car was using the other outlet?

 

[MGPHOAWR]

It had two outlets but the other outlet was empty. There were two other cabinets though which had 3 cars on them.

 

[ReintjeWA]

Wasn't there a thing where a charger was listed as 200kW but on 800V architecture, and the MG4 is 400V so will only get 100kW max? I think I remember @Coulomb mentioning this once or twice.

 

[Coulomb]

Ambient temperature 12°C but I had driven about 20 miles beforehand and I had on intelligent battery heating.

Battery heating probably only comes on at or below 10°C.

It's possible that your main battery cells are not well balanced. Some cars spend a lot of time idle in transport and/or at showrooms, during which balance can drift off. If so, a few more balance cycles might improve the DC charging speed, as may increasing temperatures.

 

[fnegroni]

what's the charging curve for the ER?

 

[siteguru]

Given that it is also NMC chemistry, I'd imagine that it is very similar to that of the LR.

 

[Bam Bam]

Could be lots of reasons as others have mentioned.

It could be that the site as a whole had its power throttled by the grid.

More likely it was your car that was limiting the power to protect the battery but you seem to have done a lot of the right things to avoid that.

Here is the charging curve from Fastned:

MG

Fastned | Nature inspired fast charging

www.fastnedcharging.com