I would do the battery balancing as detailed here:
MG ZS EV charging FAQ This guide mainly applies to the 44kWh 1st generation MG ZS EV (Can apply to other cars but figures quoted might not be the same, as battery packs & charging rates maybe larger or hopefully not smaller) Charging categories: Charging speed can be defined into these three...
www.mgevs.com
"Once the car reaches 100%, the car will go into a mode called
balancing. The ZS EV battery pack is made up of hundreds of smaller individual battery cells. Best way to describe it, you just filled up your ice cub tray with water from the tap very quickly. Most of the cubes are full (they are the individual battery cells) but a few are not. What you do now is with a very slow trickle from the tap, you top up each of the empty cubes until they are all level and full with each over. You can unplug if you want but it’s best to leave the car to balance if you can, it helps with battery health. When balancing, its using 300-500w of power per each hour. Balancing can take a while, either once the car reaches 8 hours or it’s perfectly balanced it will shut down, whichever is first. A misbalanced battery can take multiple full charges to get back to balance. The ZS EV will warn you if you need to do a balance charge, saying "Please Slow-Charge the Vechicle". Any AC will do this, but make sure you leave it once its got to 100% to do it's balance. How do I know it's balancing when I don't have a fancy smart EVSE, you may ask. Well the MG badge at the front will be solid on (not pulsing) when balancing. Once done, the badge will turn off.
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