Shingled solar panels (shingled modules) contain solar cells cut into strips that overlap inside the framed module. Intercell gaps are removed, and more silicon cells can be crammed into one module, increasing power output and module efficiency.
Shingled modules use an electrically conductive adhesive in between the top of one cell strip and the bottom of another strip. That’s what binds them electrically and mechanically connects them into their longer strings.
Shingled solar panels are eliminating a lot of the gaps. That’s why these panels reach more efficiency or higher power from shingling,” Additionally these panels are visually more appealing by eliminating busbars from view.