Undersized Inverter? 7.02kW system with 3.8kW inverter.

I’m by no means an expert with this, so if I’m all wrong about it, please let me know.

I’ve only had my system turned on for a month and access to the SolarEdge app for about two weeks, so I may need more data before I know for sure that there is an issue. But I have a 7.02kW system (18 panels x 390W) and a 3.8kW inverter, a SolarEdge SE3800H-US inverter. My graph is clipping between 10:00am and 3:00pm anywhere between 3.90kW and 4.00kW. Here’s my chart from today, not a cloud in the sky. Panels face east and only about two to four panels receive any kind of shade from my neighbors’ trees until about 10:00am.

I know I should expect my system to be more like 80% of 7.02kW, but even then 3.8kW seems pretty far off.

I called my installer on Thursday and left a message but haven’t heard back. I’m curious about how much I need to get on them about this. Thanks for any help you can provide!

(Bonus question: my SolarEdge app says under my site details that my “peak power” is 6.3kWp. Does anyone know how this number is calculated?)