AC Cycles Sync between two inputs, and between AC inputs and inversion

Hi,

This question is regarding Quattro-II 2x 120V. When outputting power, the power can be inverted from batteries (if neither AC input has power), or pass through AC input 1 or 2, or power assist.

When switching between the two AC inputs, does the unit keep the AC cycles in sync? The two inputs themselves are unlikely to be in sync (in terms of AC cycles), so if the unit does not do some magic, after switching from one input to the other, the output AC cycles will change when switching, right? In that case, I think that will cause problems for some appliances, especially the appliances that have motors/compressors, if the switching is fast? A slow switching (like dozens of seconds or even a minute or two minutes interval will not be a problem because that will give motors/compressors plenty of time to stop and then restart.)

When power assist, I would assume that the unit will make sure the assisting power will be in sync with the AC input it is trying to assist, otherwise it does not make sense. Right?

When simply switching from AC input 1 or 2 to inverting (e.g. when generator is not running and the shore power goes out, or when not on shore power and generator is running but then I turned off the generator), inversion will kick in, will the AC output cycle remain in sync in this case? I.e. not only the inversion kick-in very quickly, the kicked-in power cycles match the AC input that was just lost? I assume that the inversion should be capable of doing so? (since the unit must be capable of doing so in order to power assist, which means the unit has the capability to make the inverted AC output in sync with the input AC)

How about when either AC input 1 or AC input 2 is restored? The restored AC input’s cycle won’t be the same as the inverted AC output cycles. Will the unit gradually adjust its inversion AC output cycles to input power and then switch?

Thanks!