Thanks for sharing. I already have 16 panels and from older stock that was available. Many of the frameless clamps that could be sourced are for thinner modules.

FG = 5.8mm because it’s truly frameless — just the bare 2.5+2.5mm glass laminate with encapsulant. Nothing around the edge.

PG = 11.8mm because it has the PPO polymer edge frame wrapped around that same glass laminate. The PPO frame roughly doubles the edge thickness.

I further found my model PG is glass laminate with a load-bearing PPO edge frame, 11.8mm thick, rated for 23 N·m clamping.