A problem has been identified with the BMW i5, which interrupts charging when the car goes to "sleep mode" to allow the batteries to recharge. Specifically, charging may begin for a few minutes and then automatically stop once the car enters sleep mode, a situation that can be annoying, especially considering the cheaper nighttime rates often used for electric vehicle charging. It's important to note that this interruption may be due to the car's energy management settings or scheduled sleep times. To avoid any inconvenience, we recommend checking whether the charging interruption always coincides with sleep times or the car's scheduled sleep times. You can adjust the schedule or settings to ensure BMW i5 charging continues without unwanted interruptions during the cheapest times. An additional tip: disable scheduled charging and try a couple of direct charging sessions to observe the behavior. Ultimately, if you notice that charging regularly stops at specific times, it may be helpful to consult your vehicle's manual or contact BMW Service to check and optimize your charging and sleep management settings, thus ensuring maximum efficiency and cost effectiveness.