I have an issue with a 5kva AIO inverter waking up when the morning sky gets bright. It flicks between trying to run on hopelessly low PV energy and draining the battery bank.
Then in the evening as the sun goes down the same problem happens.
So I wrote a program that senses the PV voltage...
The site has 3s3p. Two of the strings are identical, 1125W @ 103.5 Vmp. The third string is 1200W @ 93 Vmp & mismatched by ~10v @ Vmp. As you can imagine the inverter MPPT is tracking wildly.
So I added a forth panel in series with the 1200w string. Except that this single extra panel is wired...
