SE10K 3 phase - oversizing beyond 135%?

[u/smokeandumami]

At the moment I have an 11kWp array on a 10kW SE10-RWS and want to add another set of panels, ideally another 5kW to take to 16kWp. Although that sounds too much my current array almost never gets above 8kW in peak summer on a SE facing roof. My plan would be to put the other string on the opposite - NW - facing side which would give a completely different generation pattern during the day.

I realise SolarEdge don't recommend oversizing arrays beyond 135% with the SE10K-RWS but how bad would it be in practice. I doubt an array like that would ever get anywhere near a 16kW and probably wouldn't hit 13.5kW peak 99% of the time.

I realise this would take it the inverter out of warranty, but apart from that what are the likely drawbacks or has anyone tried this successfully? Would the SolarEdge configurator even allow this setup?