Median measured P ÷ modelled P_mp per irradiance bin. Hover a cell for V ÷ V_mp and I ÷ I_mp: low V with normal I points at a local-peak lock or mismatch; normal-to-high V with low I at a current limit. The hover also gives I ÷ the model curve at the measured voltage: about 1.00 means the operating point sits on the curve (any loss is where the tracker holds it); below 1 means less current than the array should give at that voltage (effective irradiance, soiling, mismatch or measurement).

Each 15-min reading from ModuleTemperature1/2/3 is dropped if missing, exactly 0 °C, out of range, logged in the sensor-issue log, stuck for the day, colder than ambient − 3 °C in sun, or more than 8 °C from the other valid sensors. The rest are averaged; with none left, T is estimated from ambient (NOCT model).