Solar targeting reticle

thingiverse

Solar panels operate optimally when directly facing the sun, but determining the ideal angle can be a challenge. This device, secured to a panel using 2-sided tape, eliminates the need for guesswork. When the panel is positioned at an off-angle, as seen in the second image, the shadow of the arches will appear offset from the reticle on the base. However, when the shadow aligns perfectly with the reticle, as demonstrated in the third picture, it indicates that the panel is perpendicular to the light source.