An in-depth study of renewable energy systems, focusing on the principles, technologies, and applications. It focuses on various renewable energy sources, including solar, wind, hydro, biomass, and geothermal etc. Course Information: Same as ENER 453. 3 undergraduate hours; 4 graduate hours. Previously listed as ENER 553. Prerequisite(s): Junior standing or above. Recommended Background: ME 321 and ME 325.