Biofuels
Abengoa Bioenergy Corp.

Combined Heat and Power (CHP)
Ormat Technologies
Curtis Engine & Equipment, Inc
Cummins Power Generation

Distributed Energy & Efficiency
Breakthrough Technologies Institute/Fuel Cells 2000
The Stella Group, Ltd.
BTI/Fuel Cells
Pellet Fuels Institute
HUVCO 

Geothermal
Geothermal Energy Association (GEA)
Geothermal Education Office
Ormat Technologies, Inc
UTC Power


Hydropower
Verdant Power
Ocean Power Technologies
WaveGen
Voith Siemens Hydropower Generation and Grant County PUD
Enel North America, Inc.

Solar
Beacon Power Corporation
SCHOTT North America, Inc.
Solar Energy Industries Association
Uni-Solar Ovonic/ Energy Conversion Devices, Inc.

Wind
American Wind Energy Association
Southwest Wind Power
Clipper Windpower

Additional co-sponsoring organizations of the Expo include:
American Wind Energy Association (www.awea.org)
Biomass Coordinating Council/ACORE (www.acore.org)
U.S. Combined Heat and Power Association (www.uschpa.org)
Environmental and Energy Study Institute (www.eesi.org)
Geothermal Energy Association (www.geo-energy.org)
National Hydropower Association (www.hydro.org)
Renewable Fuels Association (www.ethanolrfa.org)
Solar Energy Industries Association (www.seia.org)
The Stella Group, Ltd. (www.thestellagroupltd.com)