I'm having a hard time figuring out the right settings for my Victron Orion to charge my Victron 200Ah smart lithium battery. I have a 2013 Sprinter with a smart alternator.
The issue is that when I'm pullings amps to charge the battery while driving (about 28 amps) the voltage is around 12.4 volts. With the engine switched off the voltage is also around 12.4 volts. So in my situation the 'engine shutdown detection' doesn't work. The alternator doesn't kick in, or at least not in a way that makes the voltage go up to 13+ volts.
I have read that the Sprinter keeps the battery charged around 80% (12.4 volt) to leave enough room to charge while braking (the voltage jumps to 14+ volts).
When I switch on the lights while charging the voltage jumps up to around 13.3 volts and remains there, it seems that the ECU decides to let the alternator work harder when the lights are switched on.
While driving without charging and with the lights switched off the voltage is around 12.6/12.7.
One option would be to disable the 'engine shutdown detection' and simply use the inut voltage lockout at around 12.3. This would mean that I will be emptying the starter battery while the engine is switched of. A bit crude..
Another option would be a switch or a D+ cable but I actually want to use the 'engine shutdown defection' but it doesn't seem to work for me.
Another option would be to use the default smart alternator settings in the Victron app and switch on my lights when I want to charge.
Any suggestions? Is this a common issue or am I doing something wrong?