The metal used in a solar panel is

Silver is the metal used in solar panels, forming the fine conductive lines that collect the current.

Gold conducts well but is too expensive for panel wiring.

Copper is used in cabling, yet silver is the preferred cell contact for its top conductivity.

Nickel is not the main metal in the light-collecting contacts.

Silver paste is screen-printed onto the cells as the front grid.

Solar manufacturing is a significant consumer of industrial silver.