Today I did a test run to charge my AC200pl through the charger 2 using the alternator of my car.
It did not charge using the CHG connection to DC/PV input, the green light on the charger 2 kept blinking, I then decided to try and hook up the AC200pl to the charger 2 with the BAT connection to the Battery expansion input, this showed 1-3 watt of charge in the Bluetti app and the charger 2 light became solid green.
After trying to change some settings that in the end did not solve my problem I decided to connect both CHG and BAT from the charger 2 to the AC200pl and then it seemed to work and charge the AC200pl.
The app showed the charger 2 was charging in the hundreds of watt and the AC200pl showed 40 to 80 watt of charging.
I did not see any warning icons and did not run it long but I have not seen anybody doing it like this and also not seen it in the manual.
Soon I will receive a B300k battery expansion and I will wire it different, just wanted to test charging the AC200pl through the charger 2 with the alternator