My system consists of 30 panels with 290 W Nominal output with a Sunny Boy SB 7.7 1 SP US-40 inverter rated at max continuous output of 7680 Wac. Panels are roof mounted 7:12 pitch, oriented to 170 degrees. I'm in North Idaho, so June sun's altitude during mid day is around 60 degrees. I have no shade.
Am I correct in believing that there should be long periods of time (a couple hours) in late June on a sunny day that my inverter should be maxed (clipping) given that my panels rated output would be 8700 W? I never observe this. I attached two output curves. Typical sunny day shows the curve on a blue sky sunny day. this one peaked at around at around 7100 W, but typically I'm seeing 6800 W. Max inverter shows that once in a while, the output of the inverter is at maximum, but this is very rare.
Should I be raising this as an issue, or is this what can be expected for a system with this DC to AC ratio?
Thanks, Steve
Am I correct in believing that there should be long periods of time (a couple hours) in late June on a sunny day that my inverter should be maxed (clipping) given that my panels rated output would be 8700 W? I never observe this. I attached two output curves. Typical sunny day shows the curve on a blue sky sunny day. this one peaked at around at around 7100 W, but typically I'm seeing 6800 W. Max inverter shows that once in a while, the output of the inverter is at maximum, but this is very rare.
Should I be raising this as an issue, or is this what can be expected for a system with this DC to AC ratio?
Thanks, Steve
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