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This is a list of renewable energy equipment manufacturers, primarily those that are developing new technologies. Where possible, technology descriptions, references, and external links are provided. Startup companies are included on the list if they have been reported on in the media, have a source of financing, and have engineers developing prototypes. Non-manufacturers, such as utility companies and equipment installers are not included. A firm that make two or more broadly different technologies may be listed more than once.

1 Solar power
2 Wind power
- 2.1 Large wind
- 2.2 Small wind
3 Wave power
4 Ocean thermal energy technology
5 Hydroelectricity
- 5.1 New solutions for large hydro
- 5.2 Small hydro
6 Water current power (from tides, ocean currents, and rivers)
7 Geothermal energy
- 7.1 Geothermal electricity
- 7.2 Geothermal heat and cooling
  - 7.2.1 Heat pumps
8 Biomass
9 Fuel cells
10 Energy Storage

Solar power[edit]

Aleo Solar: Make of modules. (Link)

Wind power[edit]

Large wind[edit]

Large 3-bladed wind turbines[edit]

Other large wind turbines[edit]

Floating wind turbine platforms[edit]

Small wind[edit]

Small 3-bladed wind turbines[edit]

Small savonius[edit]

Small darrius[edit]

Other or unsorted small wind turbines[edit]

Wave power[edit]

Aerovironment -- A buoy is attached to a cable, and the buoy sits several meters underwater. The buoy rises and falls in response to pressure changes from waves passing overhead. (Although the buoy's design is unclear, it probably includes a flexible, gas-filled bladder.) The bottom of the cable is connected (through an unspecified mechanism) to a generator on the seabed.
AquaEnergy Group Ltd (AquaBuOYs) -- A buoy is attached to a long piston, which pumps water to a common (shared by a number of buoys) hydroelectric generator on the seabed. Electricity is transmitted ashore.
BioPower Systems -- Oscillating flexible arms, based on kelp fronds, drive an electrical generator via a proprietary gear system.
Bourne Energy -- Technology is not specified.
Brooke Ocean Technology Ltd (SeaHorse -- Wave-Powered Moored Ocean Profiler) -- (This device is not suitable for electricity generation.) A suitcase-sized ocean sensor is attached to a rope between a buoy and a seabed anchor. It uses the motion of waves to power a ratchet mechanism. This mechanism drives the device up and down the rope to programmed depths. Water density, temperature, and turpidity data is gathered.
C-Wave Ltd -- Two or more vertical plates sit underwater and normal to the direction of wave propagation. Wave forces cause the plates to be alternately drawn together and forced apart. Hydraulic pistons utilize these forces.
Energetech -- A parabolic face focuses waves into an inverted basin, and the rising and falling of the water moves an air column. The air column drives a special air turbine generator, one whose vanes rotate to maintain generator direction when the air column reverses. (See article on "Tom's Turbine".)
Gyro-Gen, developed by Aaron Goldin -- The device includes a spinning gyroscope and a power generator inside a buoy. As the buoy travels over a wave, it tilts, first one way and then the other, and this motion causes the gyro to undergo precession. The gyro resists the rocking motion, not by tilting in the opposite direction, but by turning on the axis of the tilting force. This action is harnessed to move a crank that turns a generator.
Ing Arvid Nesheim (Oscillating device) -- A floating column is fitted into a sleeve (to enable sliding) and through a large hole in the center of a buoy. The sleeve is attached to the buoy by means of a universal joint, which enables more active (adaptive) up-and-down movement of the buoy. The movement powers an hydraulic electrical generator. (The column has a sea anchor attached to its bottom to reduce vertical movement.)
Independent Natural Resources Inc (SEADOG Pump) -- A buoyancy block moves up and down in a buoyancy chamber, which rests on a water tank on the seabed. Movement of the buoyancy block drives a piston, which pumps pressurized water into the tank and from there to a reservoir onshore. Water from the reservoir runs through hydroelectric turbines and back into the sea.
Japan Agency for Marine-Earth Science and Technology (JAMSTEC) (Mighty Whale) -- A large steel raft has a work deck aft and a vertical grill that faces the waves. The device uses an oscillating water column to move air in each of three pneumatic chambers. The turbines that convert the pneumatic energy to electrical energy are self-reciprocating. Specifically, the vanes are fixed pitch and have reflective symmetry normal to the direction of airflow, creating bidirectional equivalent lift and drag. (See image of "Wells Turbine".)
Ocean Power Technologies (PowerBuoy) -- A mostly-submerged buoy connects to a generator on the sea floor.
Kneider's Sea Wave Energy Propulsion Technology -- (This device is not suitable for electricity generation.) Wave action on flexible flippers forces a boat through the water.
Ocean Motion International -- Buoys are suspended from a platform (like a fixed oil platform) and are able to move up and down. The buoys are quite heavy (even though buoyant), and they work (pumping water) as they descend into wave troughs. The pressurized water is intended for hydroelectric use or water purification.
Ocean Power Delivery (Pelamis Wave Energy Converter) -- The machine is long and narrow (snake-like) and points into the waves; it attenuates the waves, gathering more energy than its narrow profile suggests. Its articulating sections drive internal hydraulic generators (through the use of pumps and accumulators).
OWECO Ocean Wave Energy Company -- The Ocean Wave Energy Converter (OWECÂ®) is a system of quick-connectable modules that form neutrally-buoyant arrays stabilized and sea-anchored by damper sheets. The system may be slack-moored. Large wave-following buoys convert reciprocal motion to counter-rotating, direct-drive electrical generators located in submerged chambers. Sensors control ballast volume and generator resistance. Electricity from multiple modules is combined through linking tubes to output terminals. Major components are shaped to permit volume manufacturing, shipping, and deployment. The electricity produced can be used to desalt water or produce hydrogen.
Ocean Wave Energy Conversion System (SARA) -- A surfboard-shaped buoy is attached to a long rod. The rod is embedded with magnets, and it moves up and down within a linear generator housing, which is stabilized by an anchored damping plate. A ballast is connected to the bottom of the rod, to pull the rod down after each wave.
Renewable Energy Holdings Plc (CETO) -- A gas-filled tank has rigid sides and base and a flexible (bellows-like) top. The center of the top, which is attached to a lever, rises and falls in response to pressure changes from the waves passing (about 10 meters) overhead. The lever drives pistons, which pump pressurized water ashore, for hydroelectricity or reverse osmosis.
Sea Electrical Generators Ltd -- A wave power device is made of polyethylene tubes. Details are not specified.
S.D.E. (Sea Wave Power Plant) -- A buoyant metal plate is attached at one side to a concrete seawall. Waves press the plate up (in a cantilever action) and drive an hydraulic ram. The hydraulic system is connected to a hydroelectric system.
Seabased AB -- A buoy pulls on a rope attached to a linear electromagnetic generator on the seabed. Permanent magnets (NdFeB) are used. The device is claimed ideal for calmer seas. The mechanism for adjusting the generator housing in sympathy with tidal sea levels is not specified.
Seavolt (Wave Rider) -- A cam shaped buoy rolls with the passing of waves. The rolling action drives hydraulics, which run a hydroelectric generator.
Sperboy (Embley Energy) -- A large cylinder contains an oscillating water column. The cylinder is kept in place by buoyancy and ballasts tanks and by about 12 vertical anchor lines. The water column drives air in and out of 4 horizontal ducts that radiate out from the top of the main cylinder. The ducts contain self-reciprocating turbines that convert the pneumatic energy to electrical energy.
Vortex Oscillation Technology -- Claims involve discussion of theoretical hydrodynamic concepts. Details are not specified.
Wavebob The device is a point absorber that is designed for rough, winter conditions. The top of the unit rests at or just below the surface. The incorporated linear generator uses adaptive electronics to match the wave conditions.
Wave Dragon -- A parabolic face focuses waves onto a ramp. Waves overtop the ramp and spill into a low dam. Water from the low dam flows through hydroelectric turbines into the sea beneath the floating structure. See also Wave Dragon.
WAVEenergy AS (Seawave Slot-Cone Generator) -- Waves wash up a slotted ramp (over swept-back louvers) into tiered basins, which drain into a multi-stage hydroelectric system.
Wavegen (Limpet) -- A shore-side inverted basin contains an oscillating water column, which moves an air column. The turbines that convert the pneumatic energy to electrical energy are self-reciprocating. Specifically, the vanes are fixed pitch and have reflective symmetry normal to the direction of airflow, creating bidirectional equivalent lift and drag. (See image of "Wells Turbine".)
Wavemill Energy Corp -- Water flows up a ramp, which is on a modular concrete structure. A system of valves captures the water and uses it hydroelectrically.
WavePlane Production A/S -- A raft shaped like an obtuse angle is anchored (by chain or cable) in the middle. The point of the angle is designed to self-orient into the waves. Horizontal damping plates reduce vertical movement. Waves spill into guide vanes ("funnels"), which direct water towards a cylindrical tube. The water enters the tube tangential to the curved surface, creating a spinning cylinder of water ("fly wheel tube"). The type of turbine appropriate for utilizing that spinning energy is not specified.
Wave Star Energy -- A long truss is mounted on steel piles. Articulating arms are attached to the truss, and buoys are attached to the ends of the arms. Movement of the arms forces fluid into a central hydraulic accumulator and through a generator turbine.
A.W.S. BV (Wave Swing) -- A large buoyant cylinder is open at the bottom. The cylinder surrounds and slides up and down on a cylindrical framework, which is attached to a platform on the seabed. The cylinder is mostly full of gas, and it rises and falls as the gas pressure equalizes with the sea pressure, which changes as the wave peaks and troughs pass overhead. The whole assembly is a linear electrical generator.
Waveberg -- A central float is connected to 3 bent lattice arms, each of which has another float on its outer end. Vertical movement of the outer floats drives hydraulic rams, which pump high-pressure water to shore. This high-pressure water can then be used for hydroelectric generation.

Ocean thermal energy technology[edit]

Hydroelectricity[edit]

New solutions for large hydro[edit]

Template:Empty section

Small hydro[edit]

Water current power (from tides, ocean currents, and rivers)[edit]

Geothermal energy[edit]

Geothermal heat and cooling[edit]

Heat pumps[edit]

Biomass[edit]

Bioethanol[edit]

Biodiesel[edit]

Steam reforming (of sustainable raw materials)[edit]

Fuel from algae[edit]

Clean wood combustion[edit]

Fuel cells[edit]

Energy Storage[edit]

List of renewable energy manufacturers

Contents

Solar power[edit]

Photovoltaics[edit]

Monocrystalline silicon[edit]

Polycrystalline silicon[edit]

Cadmium telluride photovoltaics[edit]

Copper indium gallium selenide[edit]

Amorphous silicon[edit]

Unsorted or other[edit]

Concentrated photovoltaics[edit]

Concentrated solar power[edit]

Parabolic trough[edit]

Compact Linear Fresnel Reflector[edit]

Dish stirling[edit]

Solar power tower[edit]

Solar hot water[edit]

Evacuated thermal tube[edit]

Other solar thermal[edit]

Other solar technologies[edit]