I recently bought a Kia EV6, parked it overnight with an 80% charge. By morning the battery had dropped to 75%. The car just sat in the garage, didn't go anywhere. Is this self-discharge or is something wrong with me?
Five percent overnight is not a problem - it's actually a sign that everything's working as it should. Even when parked, electric cars are constantly running processes: climate control maintains the battery temperature, security systems are on standby, there might be some background sync happening with the app. As long as the losses stay in that range and don't increase over time, there's nothing to worry about - this is normal idle energy consumption.
Some battery self-discharge at rest is completely normal, especially in the first few months of using the car. On the EV6, losses in the range of 3-5% overnight in a garage are within normal limits - there are security systems running, climate control in standby mode, and other power consumers. If the battery is draining faster (more than 10% overnight), then you should check whether an electrical system is left on and verify your climate settings, but based on your description everything looks like a normal process.
With a new car, you need to keep in mind that the battery hasn't reached full operating capacity yet! During the first months of use, the charge characteristics are a bit unstable, and losing a few percent overnight is actually within the normal range. Your 5% loss is nothing to worry about - it's pretty typical.
But there's one thing worth paying attention to. Make sure you've got the energy-saving modes set up correctly in your car's menu! On the EV6, you can enable Sleep Mode, which significantly reduces battery drain when the car is parked. If you don't have this mode in your settings or it's turned off, the car might "wake up" more often than it should, activating systems like ventilation or sensors.
In a couple of months the battery will stabilize, and the losses should get even smaller. For now, just check your menu settings and don't worry - everything's working fine!
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