Inexpensive Student-fabricated Solar Panels and Some Related Classroom Measurements

We describe a procedure in which elementary education students fabricate 3-cell, $\approx5 ~\mathrm{Watt}$, $1.6~\mathrm{V}$ solar panels. The panels are manufactured at a cost of about $\$6$ each. The paper also describes a series of characterization activities that we have had our students complete with the panels once fabrication is complete. Specifically, our students have determined: the dependence of panel power on load resistance, the variation of open-circuit panel voltage between different students' work, and energy capture efficiency. The activity also allows opportunities for discussion of manufacturing and process improvement which can provide unusual connections to engineering and technology learning outcomes.