Richard of Hallett Sails decided that dual Velcro, both top and bottom, with a lapel was the best method to attach the panel to the bimini. Suffice it to say it is a very, very robust attachment.
The owner of this boat, an avid offshore voyager, has been caught in off shore storms before and wanted a solar option that allowed the easy removal of the panel. He also did not want a panel with a bulky, sharp aluminum frame to try and stow below in rough seas or for storm prep.
This Solbian CP-125 panel will easily stow below a berth cushion and not even be noticeable. He also did not want to re-invent his bimini frame which was simply not strong enough to support the weight of a rigid panel.