I already have a primary PV inverter connected up through a 40A breaker. I'm looking to expand by adding a second PV inverter. To comply with the 2014 NEC 705.12(D)(2) rule I need to know the panel bus bar rating. The existing system drawings were done based on the assumption that the main breaker and the bus bar were rated equivalently (at 200A_, but if I'm reading the label in the panel correctly, the bus bar is rated at 225A.
If the bus bar is indeed rated at 225A then my allowance under the NEC rule is 1.2*225 = 270 - 200 (main breaker) = 70A. With the existing system taking up 40A, then I could install another 30A breaker for the second inverter. If not I'd have to replace the main breaker with a 175A breaker.
I have partial picture of the sticker inside the panel, and realized it matched a sample from a data sheet, so I'm including the data sheet picture.
Am I reading the "Mains 225A max" as meaning that the bus bar is rated at 225A?