These panels are very well constructed and they have a power generation comparable to our hard panels. These panels can be flexed to 30 degrees so can conform to most boat curved surfaces. The 100+ watt panels have an electrical box on the front (not shown in the picture) which contains two blocking diodes. The 50 watt panel has one blocking diode. The base material is very sturdy and strong. Each panel has grommets for attaching the panel.
I have tested the output of these panels under various weather conditions and their susceptibility to shading. Below is a quick comparison of output of our three mid-range panels laying flat at mid day on a mostly sunny day measured with a meter:
Flexible 100 watt Rigid 105 watt Rigid 100 watt
Monocrystalline Monocrystalline Polycrystalline
Short Circuit Current (Isc) 5.48 amps 5.50 amps 5.26 amps
Open Circuit Voltage (Voc) 19.2 volts 19.7 volts 20.5 volts
Computed Power (not rated power) 105 watts 108 watts 108 watts
Additional information is available on our solar panel page.