We are in the process of buying a 120w plus solar panel with regulator and extra battery etc. We were going for a rigid one until we heard about the plastic glue on types. These would certainly cause less drag but our campervan garage says that they heat up and as they are stuck to the roof, all the heat comes through to the inside. We live in Spain so heat is a problem. He also says that they are more fragile and easily damaged by low branches. I am a cynical man who wonders if he prefers to sell me his make! The other thing is that rigid panel have been around for 30+ years and the flexible ones for only 4 or 5. So is is difficult to know how long they will last in reality. Can any of you give me your thoughts and ideas?