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Luckily, newer wind turbines are designed to work in wind speeds as low as 0. Though the amount of energy your turbine will produce at these speeds is minusculeit is free energy. Rather than have your turbine sitting idle, you might as well be putting it to use. Here are five turbines that specialize in catching low wind. Gearless or direct drive wind turbines are great for areas with little to no wind under normal conditions.
They are typically lighter with lower maintenance costs. They are particularly fantastic for crowded or structurally-dense areas, where wind speeds may be scattered or otherwise dispersed. The Tumo-Int is one of the best residential gearless wind turbines available today. It can produce a maximum of watts of power under the proper conditions, but generally puts out watts of power regularly and safely.
You can also use this turbine alongside solar panels from the same company. The turbine generator has a built-in amp meter as well as an MPPT charge controller, so you can control the parameters of operation and generation with ease. The Tumo-Int turbine is easy to set up and install by yourself and comes with all the kits and supplies necessary to do so. Customer reviews reflect that it was simple and hassle-free to unpack, put together, and install in their yards or on top of homes or even RVs.
The turbine itself is made of high-quality polypropylene, while the blades are made with a durable fiberglass material. It is entirely weather-sealed, to increase its active life and to ensure durability throughout. Along with the materials and seal, this wind turbine has UV protective coating, an automatic braking system to endure sudden high winds, and a manual breaking option just in case it begins to overcharge the battery.
The Optiwind turbine was specifically engineered for use in populated areas with slow, class 2 wind speeds approximately 12 mph. This turbine increases the amount of wind power generated by 75 percent using an innovative wind acceleration technology that funnels wind into its five blades. This new technology offers additional benefits. That is the question Selsam Innovations designers asked themselves when developing their multiple rotor system.
Though larger rotors capture more wind, they are much heavier. Selsam designers believe that since the slower rate of rotation does not make the greater wind capture worthwhile, they designed a system with multiple small, light rotors mounted on a single driveshaft.
The shaft is pointed downwards and the rotors are sufficiently spaced apart so that each rotor receives fresh wind. In testing done at Tehachapi, CA and monitored by Windtesting. At the same wind speed, six times as much. It utilizes 21 blades to harness even the lowest wind input and generate power by turning a common generator.
This method optimizes the generated output while minimizing the necessary input and wind speed necessary to activate the turbine.
It is another example of an impressive, efficient gearless or direct drive wind turbine. Its output was more than double the next best turbine, despite being smaller. The manufacturer also claims that this model is extremely silent and vibration-free, making it a safe bet for the rooftop.In the trade wind belt the breeze is relatively constant, coming from the ENE to ESE most of the time at speeds that average in the teens but sometimes exceed 20 knots.
This is optimal for using a wind generator to transform that energy into electricity to charge the batteries.
If the wind were always constant then one could dispense with diesel generators, solar panels and other means, but this is not possible.
First of all, the amount of electrical power generated by wind doesn't increase linearly, at low wind speeds no power is generated with most devices and the ratio of wind speed to power is more of a logarithmic curve than a straight line. There are quite a few different generator models available for use on boats, I chose an Aerogen D because it was the quietest of all the models.
Unfortunately, that silence also translates into additional cost. The various manufacturers all advertise power output charts and curves that show their particular model to be at the top of the heap and the truth about actual output in real conditions is open to debate. Nonetheless, the D starts turning at the slightest whisper of a breeze and does a more than respectable job of providing power. It is also no lightweight and is, as far as I know, the heaviest model out there and thus it requires a solid mounting system.
I trust that this solidity also implies a long and productive life. I had Havin's Marine in St. Martin custom build the extruded aluminum mounts, braces and struts for the wind generator and mounted them myself. Havin did an incredible job in a short period of time and I can highly recommend the company plus they are located right next door to Island Waterworld.
The mounting process was involved and complex. I was anchored right off Marigot in the French side but Havin's was on the Dutch side.
I didn't want to clear out of France and clear into Holland again plus run the risk of getting stuck in the channel so I rented a car and drove the piece back-and-forth.
The main support had to carried several times, mainly because I couldn't measure angles correctly.
Once all the support struts had been measured twice and cut once I finally had all the pieces together and could start the assembly work. Fortunately a fellow singlehander, Bruce from Canada, was anchored next to me and he decided to mount a wind generator as well - so he helped me lift up and attach mine and I helped him with his; without a doubt I got the better end of that deal since his was a much smaller and lighter generator.
All in all the effort was worth it and Zanshin I got a blue-water worthy generator that is so silent that it can barely be heard, even when the wind picks up.
Downloadable Manuals page - D Wind Generator. Martin I managed to get several good snapshots of jets taking off over Zanshin I. Barths St. Eustatius Statia U. Visit the calendar master page for the daily blog entries Check out the Country pages. Return to list.The D is a wind generator, designed for a variety of marine, rooftop or terrestrial applications. It is exceptionally quiet and vibration-free in operation, qualities that are of paramount importance for any wind generator operating in close proximity to people.
The D features a powerful 3-phase alternator, and computer-designed rotor blades optimized for low speed, user-friendly operation. This innovative machine is extremely efficient in low wind speeds, yet is capable of sustained high power outputs of watts and more in higher winds.
Distinctive and elegant in design, the D is superbly engineered for long, trouble-free service, and is available in either 12,24,48 and 72 volt variants.
Price may be increased for the higher voltage models. Output Guide: 10 knots wind speed produces 40 watts 15 knots wind speed produces watts 20 knots wind speed produces watts 25 knots wind speed produces watts 32 knots wind speed produces watts.
NOTE: These figures are representative of performance at sea level when operating in an open, turbulence-free site. Call to order your D or for more information.
You can also click here to Contact us. We have had great success with the KATO poles for our installations. These poles are well built and are not difficult to install. We can also provide these poles as a package when you purchase the D system.
KATO Marine is well known for their quality marine stainless steel frabrication in poles, davits, lifts, solar brackets and most any kind of mounts or brackets you may need. Trouble shooting tips. D Drive Shaft and bearing replacement. Poor Yaw Action. Producing electricity on passage is an increasingly major consideration for the cruising yachtsman.
With on-board refrigeration, autopilot, radar and many other electrical appliances, typical power consumption when under way can be around amp hours per day or more. The Sail-Gen has the same geometry as the DuoGen and also utilises the same alternator, water impeller and drive train. The Sail-Gen comprises a rigid welded aluminium frame with carbon fibre drive shaft and cast alloy impeller.
It is compact in size and both reliable and efficient in operation. At typical passage speeds 5 — 6 knots the Sail-Gen is capable of matching power consumption, freeing the owner from engine runs to charge batteries. The StealthGen Wind Generator is a new direct-drive wind generator, designed for a variety of microgeneration applications.
The StealthGen features a powerful 3-phase alternator, and computer-designed rotor blades optimised for low speed, user-friendly operation. This innovative machine is extremely efficient in low wind speeds, yet is capable of sustained power outputs of over watts in higher winds.
It is small and light enough to be easily attached to most building structures.The D Wind Turbine is designed from the ground up to solve all the problems inherent in other turbines. The 3-phase alternator is specially designed to produce maximum power without having to spin at very high speeds.
The turbine blades are designed to match this moderate speed operation extracting the maximum amount of energy while remaining extremely quiet. High blade tip speeds are a major cause of turbine noise.
The D avoids this problem with its lower tip speed and specially designed 5-bladed rotor. Many turbines transmit low frequency noise and vibration through the hull of the boat.
The D uses an axial field, ironless rotor which means there is no cogging and hence no transmitted vibration. The D alternator uses large, powerful magnets and heavy copper windings which allow it to produce high power at lower turbine speeds. The highest quality, corrosion resistant materials are used throughout. This ensures a long, trouble free operational life in the tough marine environment. Note: To avoid overcharging the batteries and over-speeding the turbine, a shunt type regulator must be used.
Maarten St. Add to Cart. Product Description The D Wind Turbine is designed from the ground up to solve all the problems inherent in other turbines. Product Information SKU: You may be interested in…. Newsletter Signup Click here and be the first to receive our specials.
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Visit one of our stores! Find the nearest store. Eclectic Energy. Budget Marine Carriacou. Budget Marine Trinidad. Budget Marine St. Budget Marine Grenada. Budget Marine Bonaire. Budget Marine Aruba. Budget Marine Antigua — North Sound. Budget Marine Antigua — Jolly Harbour. Budget Marine Antigua — English Harbour.The D has been developed specifically to operate in close proximity to people.
The noise and vibration usually associated with small wind turbines has been designed out of the D This has been achieved by making the turbine run relatively slowly for a given electrical output.
In a given wind speed and a given electrical output, the D rotates at less than one quarter the speed of some competitor units. Combined with its rugged engineering and advanced computer-designed air blades, this makes the D the most reliable and benign turbine of its class currently available.
The air blades are precision injection-moulded from glass reinforced nylon and as well as featuring taper and twist incorporate a special low-Reynolds airfoil section which varies continually in camber from tip to root. Because of the production method used, the blades are extremely consistent in terms of mass and can be replaced singly should damage occur without losing turbine balance.
The bearings are high quality and generously sized, and are protected by twin-lipped radial shaft seals. All aluminium parts are etched, alachromed and finished in a tough polyester powder coat.
The D utilises a pole, 3-phase axial field alternator of very high efficiency. It comprises two large annular magnet rotors with stator coils positioned in between. The stator coils themselves are wound from heavy gauge copper and are encapsulated in a heat-conductive resin.
This in turn is bolted to a machined shelf within the aluminium housing, so ensuring excellent heat dissipation from the machine. This means that when operating D is virtually vibration free and no mechanical noise is transmitted to the yachts cabin.
D 400 Wind Generator, Sail-Gen, Duo-Gen & Off Grid StealthGen
A combination of the advanced air blade and alternator design delivers unparalleled efficiency in low wind speeds together with the ability to produce sustained high outputs in high winds. When mounting on a yacht or boat, positioning the turbine will be influenced by the configuration of the boat and other equipment fitted. It is important to ensure that the blades are at sufficient height such that injury to the crew from rotating blades is unlikely.
A minimum height of the lowest point of the blades above a crewed area should be 2. Because the turbine is subject to dynamic loads when the yacht is in a seaway in addition to wind loads, the tower should be securely braced or guyed both fore and aft and athwart ships. The bracing struts or wires should be firmly attached to the main tower at a point — mm below the lowest point of the blades. The D is an inherently quiet and low vibration machine.
However, certain applications may benefit from the introduction of anti-vibration mounts under the main tower and bracing struts. Note that, on a yacht or boat, no unsupported tower should exceed 2. As D is a low voltage system it can be installed by an owner. Alternatively a marine electrician or other suitable contractor can be engaged.
Ideal for mounting on buildings or boats. Virtually silent and vibration free in operation. Highly efficient and productive at all wind speeds. Low maintenance, 'fit and forget' engineering. Attractive, visually pleasing design. Robustly constructed for a long service life. Corrosion resistant materials used throughout. Turning circle mm. Weight 17kg. Available in 12V or 24V DC. In 15kts W, 20kts W, 25kts W and 30kts W. More Info. Customers also shopped for:. All are on the water and are easily reached by dinghy.
All are easily accessible by road with adequate parking. Get More! Ask for the Free Advantage Cardearn and redeem miles to benefit from many advantages! Redeem your miles in all Island Water World stores. We deliver almost anywhere. Shop Now. Available during business hours.
D400 Wind Generator
You can also contact us.The D should perform in line with, or exceed, the values given in the output graph. Should outputs be well below expectations, first suspect turbulence in the wind stream.
Alternatively, the D could be re-sited or raised in height. Finally, ensure that the battery bank is in good condition. When mounting on a yacht or boat, positioning the turbine will be influenced by the configuration of the boat and other equipment fitted.
It is important to ensure that the blades are at sufficient height such that injury to the crew from rotating blades is unlikely. A minimum height of the lowest point of the blades above a crewed area should be 2. Because the turbine is subject to dynamic loads when the yacht is in a seaway in addition to wind loads, the tower should be securely braced or guyed both fore and aft and athwart ships. The bracing struts or wires should be firmly attached to the main tower at a point — mm below the lowest point of the blades.
The D is an inherently quiet and low vibration machine. However, certain applications may benefit from the introduction of anti-vibration mounts under the main tower and bracing struts. Note that, on a yacht or boat, no unsupported tower should exceed 2. Both items have identification labels showing the voltage, typically 12 or 24 volt.
Check and re-make all connections from turbine to battery. Ensure that the two uses of a switch have not been confused. Ensure the D is connected to the non-battery side of the shunt. Check that the D is properly secured to the mount tower.Eclectic Energy D400 Wind Generator Installation (Part 2)
Also check fuses. Remove the brush-plate as above. On re-assembly, the yaw shaft should rotate silently. Replace blades as necessary. Sales eclectic-energy. Related Products. Add to basket Show Details. Newsletter Signup.