This LabRat video is Part 2 in a 2-part series on building and testing a home-built hydroelectric generator. This episode expands on the hydroelectric generator electrical and mechanical design presented in Part 1. In this video, the water wheel is constructed and tested to validate the design. Several experiments are conducted in order to develop a simple analysis tool and an experimental flume system for testing the water wheel. More information on this topic and others can be found at www.labratscientific.com.