a) EL image of a fielded cracked module. Highlighted cells show an example of a low severity crack with 1.5% cracked area (orange); medium severity with 20.4% cracked area (green) and high severity with 30.6% cracked area (red). b) Boxplot showing the maximum cell temperature trends in drone altitude and cell crack severity compared to reference healthy cells. Irradiance of the inspection >800 W/m².