Adolf F

"Glaube" has been mistranslated; here is another translation: Hello, when a lithium battery is in the battery management system (BMS), the alternator heats up.

Yes, I’d also try bypassing the isolator (diode) and charging just one battery. If the error no longer occurs, it must be the diode. I found an AI guide (which I support from a technical standpoint). 2. The “Bypass Test” (Bypassing the Diode) If you suspect that the isolating diode is defective and you want to connect the alternator directly to a battery to rule out the diode as the source of the fault, proceed strictly in this order with the system completely turned off: 1. Turn off the engine and set the main battery switch to “Off.” 2. Disconnect the input cable: Unscrew the cable leading from the alternator (B+) to the input of the isolating diode at the isolating diode. 3. Connect directly to a battery bank: Screw this cable directly onto the output terminal of one of the battery banks connected to the isolating diode (ideally the starter battery). 1. Important: The alternator now has a direct, permanent connection to this battery. The other battery bank will not be charged during this time. 4. Insulate: The now-empty input terminal of the isolating diode requires no attention. Take great care to ensure that no exposed wire ends come into contact with ground (engine parts)! 5. Test run: Turn the main switch back on, start the engine, and measure the voltage at the selected battery to verify that the full charging voltage (without diode loss) is now present