Why is inverter cut off voltage so high?

[tszaboo]

So in an effort to gather some data I started plotting the line voltage measured by the inverter. 2 days ago we had a sunny day, my system was working at 75% of it's nameplate capacity. The voltage peak for the day was 245V. Yesterday, the inverter had very little work, 1/3rd of nameplate, the same peak was 238V. While I was checking the settings, I noticed that "Power limit" is reported, which might be interesting to look at as well. In any case, since we are already in September, I don't think that we will see clipping of power this year.