As per the most recent patch notes, there's now an Ecomanager-like automatic fabber management function built into FAF.
The production toggle in the UI no longer toggles on/off, it now toggles auto/off.
If my understanding is correct, the logic is as follows:
If your energy is below 90%, and the trend is down, it turns off a fabber.
If your energy is full, and you're overflowing at least 100 e, it turns on a fabber.
Jip wanted to see discussion on the forums, as opposed to Discord.
Personally, if someone can figure out how to make this elegant in the UI, I'd like a three-position toggle - Off/Auto/On, with the default behavior being Auto.
In my opinion, this is great for people who fight with the ACU, because it means you're more likely to have Overcharge available more of the time.
In the interests of not overflowing energy though, I'd prefer to see the threshold maybe off at 90% trending down, on at 98% trending up at all.