The BMW i4 can be charged either via a household outlet (usually with a Level 1 or 2 charger) or with DC at dedicated fast-charging stations. Plugging the car into a standard household outlet results in a very slow charge. For slightly faster charging, a wallbox with a BMW Type 2 charging cable is recommended. This is precisely the problem some owners report: the BMW i4 only charges via a household socket and not with a wallbox, while no issues are reported with DC fast charging. This issue doesn't affect all vehicles of this model BMW, but only a small percentage. AC home charging appears to only work if the car is plugged into a household socket, while an error occurs if connected to a wallbox. It's easy to believe the problem is the wallbox. In these cases, it's a good idea to try another home wallbox to rule out a problem with the cable and the vehicle's charging system (for example, ask a friend if they'd allow a charge to verify everything is working properly, or ask at the office if you have a home wallbox). Once you've confirmed that the car and cable are in order, you can focus on the wallbox, perhaps contacting support after checking the various possible settings. If you need more specific details or are experiencing a specific issue (for example, the car isn't charging as it should), I recommend consulting your vehicle's manual, BMW support, or a qualified professional who can service the charging wallbox.