The author remixed this model.
Tweaked Collin Ostrowski's model to support a different solar panel, as I had some of these lying around. Seems to make up for a lot of the device's parasitic power draw while not in use.
0.1mm and 0.2mm layer heights successfully printed.
Used similar setup as per Collin's original design, but added a small cable chase to route the positive lead around the side of the panel so it doesn't take up additional depth in the case (as my panel is somewhat thicker than that used in the original).