Defaults are the shaded-string row from our simulation (rounded): 10 Canadian Solar CS6U-325P modules at an assumed 850 W/m² and 45 °C cell temperature, with one third of one module shaded. They are model output, not a site reading. Enter your own string or module values.
Expected values must be corrected to the irradiance and cell temperature you measured, for example with your tester software or a model. The band is an assumption: no source we opened sets one. Hints come from our simulation and the sources on the page; they point to what to check, not to a diagnosis.