Should I be concerned?

I think a 1.25 factor between DC PC panel watt vs AC inverter watt rating is considered the optimum.
LG Neon 2 350W vs IQ7 250W = 1.4 factor.
That is why you see flattened tops in your graph.
For the 1.25 factor a 280Watt inverter (Iq7+ = 290W) would be optimum

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