Ok gotcha.
My dc/ac is 1.18. Between it being cloudy and my travels, I actually haven't been able to play with/observe the system hardly at all yet, but the one time I did, the inverters were putting out max. I would have to do more detailed analysis to see if it's worth the $$ for another inverter or just add more panels to existing.
Cool.
I go up to 1.2 as a rule of thumb when designing new systems. (If it makes sense e.g 120% rule etc.) No appreciable loss of power annually. I think it is less than 1%.
I would just add panels.
I have added panels to get an existing system of 2.2 kW-DC expanded to 6.1 kW-DC on an existing 3.8 kW inverter!
Yeah that's a lot, It is an outlier.
But in this one case, it made sense given the conduit run, install labor, cost of new inverter, second inverter space requirement and ugliness on wall, and the fact that the existing inverter was installed last year, and it is a good one.
Also.... I am not saying I wouldn't pull a permit for such an expansion.......... but the inverter and AC inverter output circuit and PV breaker certainly were not touched or altered.
Pros and cons change if your inverter is near expiration or problematic.
I wonder what her bell curve will look like in June. Probably a square curve, a flattened top hill.......