I love to hear about people who challenge our now-ingrained assumptions about electricity (that modern life requires lots of it, that we need to be grid-tied, that electricity should always be available and in near-unlimited quantities, etc.).
What I wonder though is why just the single PV panel? Why not at least hook up 4 or 8?*
*note: I'm in a crappy WiFi location so I can't watch the entire video, but only read the text. Perhaps they explain?