1. A module frame for photovoltaic modules, characterized in that the module frame comprises vertical webs that are offset from an outer edge of the module frame by at least a distance d in the direction of the frame module center, such that a cross-section through the module frame forms an outer volume that is at least partially open having at least one vertical web of the vertical webs limiting said outer volume toward the center of the module frame, wherein the outer volume is designed for cable routing and for integrating connection sockets or module electronics, wherein the module frame has a connection socket integrated into the outer volume of the module frame and a connection plug with two or more contacts, wherein the module frame comprises a module electronics, wherein the module frame has webs for engaging in grooves of module electronics, wherein the module electronics are fixed by snapping one or more grooves located in the housing of the module electronics into said webs, wherein the snapped-in module electronics are slidable onto the connection plug of the connection socket within the frame.