How To Build a 400sqft Solar Powered Off Grid Cabin for $2k - How to build a nice small cabin powered by solar panels. Lamar Alexander built this cute little 400 square foot cabin for approximately $2000, and powers it with a 570 watt solar and wind power system.
How #WindPower Works : When you talk about modern wind #turbines, you're looking at two primary designs: horizontal-axis and vertical-axis. Vertical-axis wind turbines (VAWTs) are pretty rare. The only one currently in commercial production is the Darrieus turbine, which looks kind of like an egg beater.