Energy storage converter (PCS) consists of power, control, protection, monitoring and other software and hardware components. Divide it into single-phase and three-phase.
The gap lines are spaces between the solar cells, through which you can see the panel's white backing. Both the fingers and the busbars are electrical conductors.
The most common cause of white spots is moisture seeping into the module laminate. A solar module is built like a sandwich, with the solar cells and encapsulant sealed between glass and a backsheet. The edge seal is the first line of defense against the elements.