I see the term "overcharged" being used about bonuses from items, what exactly does this mean and how does one know when it is happening?

thanks

https://www.youtube.com/watch?v=ssob9XP4dUc

This video explains it and gives you a visual.

TL;DR once you reach a certain soft cap on a stat, you go into overcharge and gain 60% less new gains from sources for that stat. Its just a cute way of saying diminishing returns.

Cool, thanks.

you have to distinguish between them stats which have the soft cap and get overcharged, and them stats which don't. From the video you can see for example that mana and mana regen have soft caps, but spell crit and spell power dont. I am not sure if this is intended/final, but I think the minmaxers will try to remain under the softcap for those particular stats and pick those items with those particular non-capped stats.

To be fair, those stats have soft caps, they're just hard as hell or impossible to reach. Spell damage and crit in particular are somewhat rare stats, whereas regeneration and resource stats are very common.

How do you know when you've reached the soft cap? Has it been researched and listed somewhere for each stat?

It depends on level, somewhere around 1900 @ 50 for stam and magic. It also increases when you hit new vet ranks.

They're pretty easy to reach at the moment.

The stat will turn orange in your character sheet and have a tiny lightning bolt with a tooltip on mouseover explaining it.

WOW! First game where i can see clear soft cap indicators!

Take a look at the video linked above, he shows his character sheet a lot and the difference when he's overcharged and not.

It means that armor enchantment w/50 Health is only going to grant 20.