- American Governor Company
- Full-service governor company, providing support for mechanical, analog, and digital hydro turbine governors.
- American Hydro Corporation
- Supplies and installs large equipment for the hydroelectric and water distribution industries, specializing in the design and manufacture of high performance hydroturbines and pumps.
- Hartvigsen-Hydro
- Supplies components to help you build a working hydroelectric power plant to power a home or cabin. Available microhydro components, include, turgo runners, turgo spoons, motor shaft arbors, shaft couplings, nozzles, and sight levels.
- Hydroacoustic Technology, Inc.
- Advanced tools for fisheries research, underwater acoustics technology for acoustic tags and echo sounders, including the latest equipment, software, and other key services.
- HydroWest
- Develops, designs and builds hydroelectric projects ranging from one megawatt to over 50 megawatts.
- Independent Power LLC
- Siting, design and installation of renewable energy systems, photovoltaic panels, inverters, batteries, power control panels, meters and other components of renewable energy systems for do-it-yourself home owners.
- The James Leffel & Co.
- Specialized in the design and manufacture of hydraulic turbines in a wide range of capacities and types.
- Ocean Power Technologies
- Specializing in cost-effective, advanced, and environmentally sound offshore wave power technology.
- Pelamis Wave Power Ltd
- Manufacturer of a unique system to generate renewable electricity from ocean waves.
- Phoenix Power Control, Inc.
- Provides products, systems, and services for the power industry, with extensive hydroelectric power and control experience.
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