Hello, in turn: Dec 2023: alternator defective -> have I changed Sept 2024: jumps suddenly no longer on -> pushed -> battery Zauhause measured ->empty conclusion: battery (3 years old) defective -> new battery built in -> once driven Next morning, car start -> clack, clack -> battery empty! battery charged, idle voltage 12.4V -> consumer current at no ignition: 0.2A (200mA) battery built in, measured: idle voltage: 12.2V When starting: 10-1 2V (is normal) In the stand gas: 12.2 V !!! (here at least 14V of the LiMa are attached) At 3.000-4,000 rpm -> still only 12.2V !!! error!!Now my question: => New alternator defective again ??? there is probably also a regulator, is the possibly defective ???? Where is the alternator controller ???? How can I measure whether the alternator or only the regulator is defective ???? Thank you very much!