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It's likely your inverters are rated for less than 327 W output.
I don't doubbt your seen instantaneous array outputs of or a bit more than 8.5 kW. As for system output >= 8.5 kW, I have the same panels as you have. Only difference is they're 8 yrs. old (but going strong).
I too have seen momentary or very short term input to my string inverter > the 5.28 kW STC raing of the 16 panels, but always less than for a couple of minutes, always in the spring, always within about an hr. or so +/- on either side of the time of min. incidence angle on my 5.2 STC kW array and always when it's a partly cloudy with reflections from clouds acting as cloud cloud based albedo enhancement.
The best array input to my inverter I've ever recorded from my 16 ea. Sunpower 327's on a cloudless day is 4,972 W. That was on an unusually cold, very windy day in May with a near zero solar incidence angle on the array with the average array temp. was only about 12-14 C. above the ambient air temp. on my roof.
Read the book when you get it. There are things about arrays and how they work that you don't know (yet).
I don't doubbt your seen instantaneous array outputs of or a bit more than 8.5 kW. As for system output >= 8.5 kW, I have the same panels as you have. Only difference is they're 8 yrs. old (but going strong).
I too have seen momentary or very short term input to my string inverter > the 5.28 kW STC raing of the 16 panels, but always less than for a couple of minutes, always in the spring, always within about an hr. or so +/- on either side of the time of min. incidence angle on my 5.2 STC kW array and always when it's a partly cloudy with reflections from clouds acting as cloud cloud based albedo enhancement.
The best array input to my inverter I've ever recorded from my 16 ea. Sunpower 327's on a cloudless day is 4,972 W. That was on an unusually cold, very windy day in May with a near zero solar incidence angle on the array with the average array temp. was only about 12-14 C. above the ambient air temp. on my roof.
Read the book when you get it. There are things about arrays and how they work that you don't know (yet).
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