Seems like a no-brainer

[NEOH]

SQUARE-D DU221RB AC Disconnect, NEMA3R, 30A 240VAC,
2-Pole Unfused, Hub
Won't you need a 60A disconnect? each inverter requires a 30a fuse x 2 = 60amp disconnect I think.

They have quantity (2) of the 2-Pole 30 Amps Mains Breaker.
Maybe, they need Quantity (2) of the 30 amp DU221R1RB vs a 60 amp model?
Are they designing two individual / seperate 5kW systems all the way back to the Main Panel?

The -40 SB Inverter is now the older version
The -41 SB Inverter is now the newer version

The -40 SB Inverter has dropped down to $1,020.00