What is the AC pass through rating of parallel XW inverter Systems?

Multiple Units pass through rating for XW units?

IMPORTANT:  In a multiple unit configuration where two or more XW units are set up together, the AC transfer relay rating remains the same at 60 amps.  This AC transfer relay rating does not double/triple etc.
WARNING FIRE HAZARD:  Do not power multiple loads in excess of 60 amps even in multiple unit configuration.  Failure to follow this instruction can result in death or serious injury