@Candleflame, your reply had a lot of good information, but this part is not correct. With the exception of the 10% top locked SR and recent shenanigans with the new packs in EU cars, Model 3 batteries charge up to 4.2V per cell. This has been widely seen and reported.
Here’s an example at 100% SOC showing 403V at the pack and 4.20V at the cell level. Start at about 2:40.
Any special instructions for the 10% top locked SR?