Constructing the 'Power Inducer' (Potato Battery)

What happens here

To boost the solar panel's power, the presenter introduces a 'secret ingredient' from a box: a red potato. He dramatically cuts the potato in half using a large machete. Next, he uses a hammer to drive a galvanized nail into each half of the potato. He then connects the alligator clips, previously shown, to these nails. He emphasizes the satirical instruction to keep the potato's cut surface 'wet' and to protect it by placing it cut-side down.

Goal: Create the (satirical) power-boosting component for the off-grid system.