The Office of Energy Efficiency and Renewable Energy includes several research, development, and deployment programs that focus on renewable energy. For more information, see the websites for the programs:
Biomass 
The Biomass Program helps transform the nation's renewable and abundant biomass resources into cost-competitive, high-performance biofuels, bioproducts, and biopower.
Geothermal
The Geothermal Technologies Program works in partnership with industry, academia, and DOE's national laboratories to establish geothermal energy as an economically competitive contributor to the U.S. energy supply.
Hydrogen and Fuel Cells
The Fuel Cell Technologies Program is a comprehensive portfolio of activities that address the full range of barriers facing the development and deployment of hydrogen and fuel cells with the ultimate goals of decreasing our dependence on oil, reducing carbon emissions, and enabling clean, reliable power generation.
Solar
The Solar Program is primarily executed through the SunShot Initiative, a collaborative national initiative to make solar energy cost competitive with other forms of energy by the end of the decade. Reducing the installed cost of solar energy systems by about 75% will drive widespread, large-scale adoption of this renewable energy technology and restore U.S. leadership in the global clean energy race.
Wind
The Wind Program is developing the rapid expansion of clean, affordable, reliable domestic wind power to promote new job creation, increase rural economic development, and help meet the nation's energy needs.
Water
The Water Power Program researches, tests, evaluates, and develops innovative technologies capable of generating renewable, environmentally responsible, and cost-effective electricity from water resources.