Is it possible to synchronize multiple UPSs?

Question

Electronics

Good day!
I want to try to synchronize 3 or more UPSs (the same) to increase power (at least 2 times).
For a long time, it was possible to pull off such a trick with two generators by synchronizing the phases, so I think it will work with a UPS? What tricks can wait?
PS I don't want to straighten it with a diode bridge, and then again I don't want to make a sinusoid.

Answer 1

And why again do a sinusoid if in switching power supplies (almost all modern technology) all the same diode bridges (even in chastotniki)? What is the sacred meaning in this sinusoid? (Except for load distribution in a diode bridge)
Do you even know why we have an alternating voltage in the outlet?
Although if you find circuits and the controller has a synchronization input and output, then you can, you can still connect the power part to one controller, turning off the low-current part of the others completely, but then you have to recalculate the protection and more on trifles.
Make diode bridges and don't sweat your brains.

Answer 2

No. In practice, the one that turned on first takes all the power to itself, and the second one simply does not start.