Clipping more than expected

[jflorey2]

We are not comparing apples to apples here. It seems like you have a SMA Sunny Tripower 1500TL Inverter. This is a commercial inverter that is designed for oversized DC/AC ratios.

There's no such inverter. Did you mean the 15000TL? That would make more sense.

But in any case the inverter he has - the SB8000 - is a run of the mill 240 volt inverter, often specified while it was available due to its low cost.

[discodanman45]

There's no such inverter. Did you mean the 15000TL? That would make more sense.

But in any case the inverter he has - the SB8000 - is a run of the mill 240 volt inverter, often specified while it was available due to its low cost.

Yes, I meant the 15000TL. The graph they posted had a peak output of 15 kW, so I figured that was their system.

[nwdiver]

Yes, I meant the 15000TL. The graph they posted had a peak output of 15 kW, so I figured that was their system.

Apologies for the confusion. The graph I posted was of a recent system that just came online last week. (2) 7.7SB on 22.77kW. So oversized by ~148% with E/W facing arrays. The SB8000 I have at my home has been online for ~6 years and I've never observed any derating despite being oversized by ~134% with panels facing 180S. My inverter is usually saturated for ~5 hours/day in the spring and ~2-3 hours/day in the summer.