The solar panels frame has nothing to do with the water-tightness of the sandwich and its ability to weather outdoor operations over time. There are several characteristics:

– Handling

– Storage

– Grounding

– Fixation

– Resistance against mechanical load such as wind, snow

Two modules with the same frame thickness may not behave the same, depending on the choices made during design

The evolution of frame design is not very important and should always be done carefully to ensure reliable behavior.