You can use PVWatts to estimate what it should produce.
You're missing the daily rotation of the earth that causes the sun to move across the sky. A 400W solar panel will only produce its maximum power at ideal conditions and the sun is perpendicular to it.
Then, you need to know how much inverter will produce max. That IQ8 is only rated to 300 max continuous and that is for the IQ8+.
Just checked to specs on that inverter. Max power is 300W output.
Don't forget, higher inverter output capability will mean fewer panels per circuit breaker, most likely.
My installer finally managed to get the CTs working and finally the enphase app is making some sense. The 29 panel system produced 63KwH today and also matched the PVWatts number. So all good for now.
Any feedback from the installer what was the issue, reverse wiring perhaps?
They finally believed that there is a reduction in production even though no error messages of any kind on app. They first scheduled a technician to come out Aug. 31, but then someone called and said they need a full crew and pushed back until October 11. Very disappointed. Going through hot summer a/c usage with only half the solar production. Also still don’t have PTO, even though last inspection was in March.
