A little bit of explanation…
Casing for cell
Outer walls are 4mm thick while the one’s inside are 3mm. Batteries are tightly fixed between the walls with possibility to rotate them as the wiring will dictate.
On four inner corners I left holes for casing attachment, distance between them (on the smaller side of case) corresponds to corrugated roof panels (if the ones that others are using in this challenge are actually being used). If not – there are four holes outside of the case. However, I think that no matter which model will win, who ever will be installing this he will probably bolt our casing to whatever piece of sheet metal he can find… if he has a piece of roof panel even better.
Cell is fixed with 2mm flange from three corners via top of the case (0.1 spacing between cell and top of the case) and even if it has usable surface all over it still covers only 0.05% of it. I left a 1mm gap in the middle of bottom case walls (as shown on one of the pics) so that even if some water leaks it would still go through that gaps all the way out. Have in mind that case is tilted due to roof so the water will slide. That’s why there is no wall around the bottom of the solar cell. A small amount of silicon can be used along the edges but maybe there is no need. Case lid (top) is screwed with two M4 12mm socket head screws.
Casing should be white or with some similar but light reflecting color because solar cell are way more effective if they are cooler. That’s why casing should have some holes so the air can flow
Casing for LED
Everything is made with clear plastic. It would be nice if even bottle caps are made the same way so that water can receive more light during day time. Cap and the tube inside are in one piece and they are hollow all the way for easy access to diodes and cable routing. Whole thing is protected from water by another cap that is placed and rotated on top of the bottle (there is enough room for cables)
If I have time I’ll design another way of led positioning were they are placed to the side as well. Same goes to rendering where the whole thing is fixed to the roof...
Like if you like :)