So that's what I'm doing. I have 3x6" cells, and each panel consists of 40 cells. The panels are made out of ply wood with 3/4" batten board around the edge. The whole thing is coated in white UV stain to protect from the rain and sun. The plexiglass covers the whole thing. I will coat the whole perimeter with silicone as well. I am connecting 2 panels in series to provide 40 volts. I'm using a powerjack 1200 grid-tie inverter. Does anyone know if I need blocking diodes when using a grid tie inverter?