Rigid solar panels outperform flexible panels in most every case. They are larger, heavier, and more expensive, but you will generate more power to feed your hungry system using them. There are two somewhat unique features of these panels. They are bi-facial, meaning the unused back side of the panel, which is typically unused, is also a sheet of photo cells. This allows them to generate power from the light reflecting from the ground, water, and deck. They are best suited for solar arches, side hanging, etc. If you are flush mounting your panels, in theory, you will still get some benefit. However, we would suggest it's not worth the cost and added fragility of the panels for that application. Yes, bi-facial panels are more fragile than standard panels becasue they lack the backing substrate found on standard panels. They are also 10BB. Go and look that up as you'll find some nifty pictures to describe what that means. Basically, it means there are more connections to the bus. That transaltes into less power generation loss when the panel is partially shaded by a boom, tree, lounge chair, etc.

• Compared with traditional backsheets, this upgraded version can generate electricity not only from the front, but also from the back! Efficiency increased by at least 5%!
• 10BB is here! Less influence from shadow, more power than average 5BB solar cell. Passed EL tested solar modules. 10BB solar cell, you best choice of solar power system .
• 2pcs 200 watt solar panel feature a black corrosion-resistant aluminum frame. It can also withstand strong winds of 2400Pa and Snowload of 5400Pa. Both the IP65 junction box and IP67 connectors have excellent waterproof function. 
• Each solar panels has specially designed pre-drilled holes for easy installation.