UPS Autonomy

Say under normal situation, if each UPS system take only 50% of load, don't the autonomy becomes higher?

I would presume ‘Normal’ operating condition to be mains supply energized, UPS and battery arrays to be at idle.

Expanding on my comment #4.

Note well, my dear friend Anonymous Poster#1, that a presumption is made regarding your comment #2. That is to say a slice of information, known to you, did not make the trip from your head through your fingers to the keyboard and eventually to the members of the forum… this leads to assumptions, presumptions, and guesses.

Communication is more than just the belief that it has taken place.

Incomplete communication is the root problem here. If the specifier (a presumption) cited in your original post had succeeded in squirting out of his fingers and onto a keyboard all of the needs and desires regarding this UPS power supply that are clear to him, in his own mind… passing this clarity to you… Well, we would not be here now, would we?

Way I read the post is you have a
System demand for 100% full power for a minimum 2 hours

So its obvious that one UPS System can only meet 1 hour demand at full power so to meet the original 2 hour demand you need two UPS systems.

Otherwise you would only need 1 x 100% UPS system instead of 2.
You only have 2 hours in total, not 4 !

The UPS system as designed is continuously operating at 100% since the UPS is on-line at all times.. It may possibly continue to operate at 100% load for two hours or more depending on the conditions of the connected batteries after /when commercial power is lost or interrupted..