Our inverters are oversized and we've never experienced clipping but we had an issue similar to this last year with one of our inverters. This doesn't look like clipping to me. Every graph I've seen of clipping shows the production flatline at the top of the curve. I think this shows the inverter is having other problems.I oversized my inverters to never have these issues. BUT, I was not worried about the extra price
Maybe @nwdiver can chime in with his opinion?