Clipped Power and need to determine how much is being Clipped.

[Will792]

I have 30 panels on one plane of the roof with 24 panels connected to Enphase IQ6 and 6 panels with IQ7. Continuous rating for IQ6 is 230W and IQ7 240W. Panels are 10 LG 330W and 20 Suniva 260W.

Since I do see some clipping in May/June I expected that LG panels with IQ7s would have noticeable higher
monthly electricity production for these months than panels with IQ6. There is none.

Clipping in action for one of the panels:

LG330IQ7clipping.png .

If I knew this information when I selected components for my system I would have used LG Neon R panels with 350-360W rating with the same IQ6/IQ7 microinverters. The aggregate effect of clipping to total production is smaller than what most people estimate.

[Ampster]

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If I knew this information when I selected components for my system I would have used LG Neon R panels with 350-360W rating with the same IQ6/IQ7 microinverters. The aggregate effect of clipping to total production is smaller than what most people estimate.

I agree. If you had used the bigger panels you would have seen more clipping but also more production overall. Your system would ramp quicker and produce more on overcast days than one with a lower DC to AC ratio. While the visual of a clipped production curve looks to be not perfect, what one does not see is the optimum result of having a higher DC to AC ratio. Having said that, I should remind the readers that there is no perfect DC to AC ratio. it all depends on the system design. For example one poster here has a DC to AC ratio larger than 1.5 to one and sees no clipping.