Mix of module types on one MPPT

[LauraH]

Hi,

I am modeling a complicated array that uses 6 different modules, some mono- and some bifacial.  We are supposed to run strings of as many as two bin classes of monofacials and one class of bifacials all into the same inverter.  This inverter model (rated at 4000 kW) has a single MPPT.  On top of everything else, the inverter loading ratio is 1.5, so clipping will be important.  What is the best way to represent this?  I have read the information about "power sharing" in the manual and watched an instructional video.  These both centered on how to represent multiple MPPTs in the same inverter separately (which is the opposite of power sharing).

I know two ways to combine modules of the same type but different bin classes  This is by creating an "equivalent block" by picking the dominant module and adjusting either the number of modules or MQF to get the correct DC capacity.  The other is to break up the inverter.  The former has the advantage of treating all of the DC power together when computing clipping.  The second is more explicit, but would seem to miscalculate the clipping.  

I know one way of mixing mono- and bifacial modules.  That is creating an "equivalent block" where the capacity of the bifacial modules is multiplied by an effective received irradiance factor and then following the standard "equivalent block" method above using a monofacial module.  Maybe the two types can just be combined in PVsyst 8?  Otherwise you can break up the inverters again and put the monofacial and bifacial modules in different variants.  (Again, this would seem to compute clipping incorrectly.)

So back to the original question:  What would be the recommended/most accurate way to model these inverter blocks?

Thanks.  Too many Frankenstein systems these days!