I had noticed before that my flat's adu fluctuates, but didn't dig for the cause. Last imaging run I decided to test what's going on and found this:
Right after turning the panel on I started to take Lum flats for about 2 sec long.
The first flat came about 40000 adu but the following flats dropped 80-100 adu each flat frame. By the time I finished 40 flats my last one showed a drop if about 2000 adu.
Then I moved to RGB flats and noted continious drop in adu. It is only after 30 minutes ny last flats became somewhat regulated.
I went to my friend who also use same panel and noticed same behaviour with he's flats .
We both feeding regulated 12v for the inverter.
Can you please check out your flats and see if you notice the same thing.
I contacted Gerd but he says that no one ever complained about this. Maybe no one had a chance to check it out?