12-03-2025, 03:04 PM
What do you exactly mean by 2-3h standing time? Has car sat hood open and doors locked that time before measuring or have you opened doors and hood first before measuring? If you have unlocked and opened doors, in other words, "waked up" all computers in car, ~12V is quite normal I would say. When you lock doors it takes a little bit time before car is starting to shut down systems.
What kind of weather there is and what charger do you have? I'm asking because it is a common known phenomenom that cheap "smart" chargers can't charge cold battery. As far as I know the reason for that is that because cold battery can't charge fast, the charger things that battery is full.
Modern cars like these never fully charge the battery over 80%. It means that voltage never goes over 12,5V if you don't charge it with external charger. When you wake up the car by unlocking and opening doors, the voltage drops really fast. Try to measure voltage immidiately after driving. What does it say?
blazki: I'm not an electrician and I can't explain this like professional would but if you have good charger there won't be any problems in real life. For example my charger usually gives about 7-8A immidiately when I plug it and turn it on after driving. When I turn ignition on it immiately starts to give 20A for the car. There might be huge difference between different charges, I don't know... But good charger seems to react for dropped voltage really fast.
What kind of weather there is and what charger do you have? I'm asking because it is a common known phenomenom that cheap "smart" chargers can't charge cold battery. As far as I know the reason for that is that because cold battery can't charge fast, the charger things that battery is full.
Modern cars like these never fully charge the battery over 80%. It means that voltage never goes over 12,5V if you don't charge it with external charger. When you wake up the car by unlocking and opening doors, the voltage drops really fast. Try to measure voltage immidiately after driving. What does it say?
blazki: I'm not an electrician and I can't explain this like professional would but if you have good charger there won't be any problems in real life. For example my charger usually gives about 7-8A immidiately when I plug it and turn it on after driving. When I turn ignition on it immiately starts to give 20A for the car. There might be huge difference between different charges, I don't know... But good charger seems to react for dropped voltage really fast.