tle Here
Serial Number:_______________
Safety Issues
When installing the D400, exercise due care at all times. The turbine weighs 17.2
kilograms and is awkward in shape. It is best to plan the installation carefully in
advance and enlist some help when erecting the machine in order to avoid accidents.
Complete as much of the installation procedure as possible at ground level.
Choose a calm, dry day for your installation if possible.
D400 blades are quite sharp, particularly on their trailing edges. Handle with care.
D400 is robustly engineered, but contains high-energy ferrite magnets that can be damaged if the machine is dropped or handled heavily.
When running, particularly if disconnected from the batteries, D400 is capable of
producing high voltages. Caution must be exercised at all times to avoid electric shocks.
Always observe correct polarity when connecting D400 to an electrical circuit. Reverse
polarity connection will result in damage to the wind generator.
The D400 must be appropriately fused at all times.
Never approach the path of the blades when the machine is operating as severe
personal injury could result.
Always stop the machine and secure the blades before
attempting maintenance.
Ensure that all batteries are disconnected when undertaking maintenance.
The D400 is designed to be permanently connected to a
suitable electrical load such as a battery bank, dump
regulator or inverter.
It should never be allowed to run unloaded,
ie. open-circuit, for more than a few minutes.
In an open-circuit condition, the D400 will overspeed, and
very high voltages can be produced.
There is also a risk of damage to the machine’s rectifiers.
Safety issues
Features of the D400
Checklist (parts, tools etc)
Principles of wind energy
Installation - Boats
Terrestrial mounting
Guyed towers
Freestanding towers
Roof mounting
Assembling the D400
Electrical connections
Stopping the D400 / Braking switch
Electrical installation/ Circuit diagrams
Performance and expectation
Routine maintenance
CE Conformity
Appendix: Specifications
Estmated Annual Generation
Thank you for purchasing the D400 Wind Generator,
designed and manufactured by Eclectic Energy Limited.
The D400 is one of the most efficient, powerful and well-engineered
turbines currently available. Please read the entire manual
thoroughly prior to installation to ensure your personal safety and
the optimum performance of the equipment.
If you have any questions or uncertainties, having read the manual,
please contact your authorised dealer, or Eclectic
Energy Ltd, for further clarification.
Features of the D400
The D400 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 D400. 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 D400 rotates at less than one quarter the speed of some
competitor units. Combined with its rugged engineering and advanced computerdesigned air blades, this makes the D400 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
alternator and yaw shafts are precision-ground from 316 grade stainless steel,
and the D400’s body is a robust aluminium alloy casting.
The bearings are high quality and generously sized, and are protected by
twin-lipped radial shaft seals.
The tail is formed from aluminium sheet into a shallow ‘S’ section in order to
impart stiffness and prevent resonance. All aluminium parts are etched,
alachromed and finished in a tough polyester powder coat.
The D400 utilises a 12-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. 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.
Eclectic Energy Ltd’s attention to
design and quality should ensure
your D400 gives years of
trouble-free service.
Congratulations on your purchase.
Dimensions, output
Rated outputs 225 watts at 11 m/s, 400 watts at 16.5 m/s
D400 Wind Generator Output
Power in watts
Wind speed in knots
Check that you have received in your
delivery two cartons containing:
1 x alternator body
5 x air blades
1 x tail
2 x hub plates
1 x air hub spacer
1 x tower liner
1 x nose cone
Required for installation:
The principles of Wind Energy
Wind is a function of solar energy unevenly heating the
Earth’s surface. As warmer air rises at the equator, cooler
air flows in to replace it, setting in train global convective
currents. This circulation which we call wind distributes
both heat and moisture more evenly around the earth so
providing us with a comfortable planet to inhabit.
The same process of convection also happens more
locally, for example differential rates of heating and cooling
between land and sea, producing the land and sea
breezes which are most marked in the summer. These
streams of moving air also provide us with an
inexhaustible, if intermittent, energy source.
A wind generator works by converting some of the kinetic
energy in wind stream to electricity. Air weighs about
1.2 kg per cubic metre at sea level, and kinetic energy is
expressed by mass times the square of its velocity.
Understanding this is a key to appreciating the energy
available to wind generators.
In short, the amount of energy available to the wind
generator rises dramatically with increasing wind speed.
Regrettably, the reverse is also true. In low wind speeds
there is very little energy to capture.
It is important, therefore, when considering the site of your
wind turbine, that you choose a site with the highest
possible wind speeds. In addition, the airflow should be as
free from turbulence as possible.
Mounting Tower
Extension cable
Battery terminals
Connection blocks
Cable clips
Additional system items:
Charge splitters
Volt and ammeters
Wire strippers
Marine Mountings
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 airblades above a
crewed area should be 2.4 metres.
Also ensure that no part of the turbine can come into contact with any other part of
the boat’s fittings or rigging. 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 athwartships. The bracing struts or wires
should be firmly attached to the main tower at a point 200 –300 mm below the
lowest point of the blades.
The D400 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 2.5 metres in length. The wind loading on the D400’s rotor disc can
exceed 50 kg, so any tower structure should be designed to allow for a safe working
lateral load of 70 kg at the hub height of the turbine.
For inland watercraft such as narrow boats, a hinge-down tower arrangement can
be utilised to allow for rapid lowering of the turbine for passage under low bridges
For ketches and yawls, a mizzen mount is often suitable.
The D400 is also suitable for mounting on a stub tower from stern arches and
Contact your Dealer or Eclectic Energy Limited for further information.
Terrestrial Mounting
The performance of your D400 will be influenced by the topography of your proposed
mounting site. The golden rule with wind turbines is to mount them as high as is practically
possible. The higher the turbine is mounted, the more productive it will be. This is because
windspeeds reduce steadily as they approach the ground due to the effect of friction
between the airstream and the earth’s surface. This ‘wind shear’ effect is less marked over
smooth surfaces such as the sea, and more marked over ‘rough’ surfaces such as woods
or urban areas. Obstructions such as trees and buildings also introduce turbulence into the
airflow, and no wind turbine works at its best in turbulent air. Given that low windspeeds
and turbulent airflow will greatly reduce the efficiency of any wind turbine, it is important to
locate the D400 in the clearest, fastest airflow possible.
Aim to mount your D400 at least 8 metres above the height of any surrounding obstruction
within a 100 metre radius. If this is impractical, aim to mount the turbine as high as
A useful assessment of the quality of airflow at a proposed location can be achieved by
attaching a streamer, similar to a kite’s tail, to a pole and letting it fly at the proposed height
of the turbine. If the streamer flies straight, the airflow is clear. If the streamer flutters and
spirals, turbulence is present, and you should consider an alternative site.
Mounting towers can be either guyed or free-standing. Free-standing towers need to be
very substantial and require either a screw pile or concrete foundations. They are therefore
generally expensive. Guyed towers are the more usual choice.
Guyed Towers
A typical guyed terrestrial mount for a D400 would consist of a tubular tower supported by
four or more guy wires. No more than 2 metres of the tower should extend above the upper
guy wire attachment point. The guy wires themselves should be of at least 4 mm in
diameter with a breaking strain in excess of 50 kg. They should be galvanised or stainless
steel for protection against the weather. Shackles and bottle screws should be at least 5
mm in diameter and where guy lines are looped, the loop should be held with a minimum of
3 wire rope grips, and should incorporate a thimble to form the eye.
Guy wire radiuses should be observed. The recommended radius for the guy wire anchors
is 0.6 of the tower height.
Four guy wires are preferable to three, as this enables the tower to be hinged up from its
base with three guy wires already in place to support the tower as it ascends.
Correct use of Stub Tower
Freestanding Towers
For small wind turbines such as the D400, free-standing towers
can take the form of old telegraph poles, or a self-supporting steel
latice tower.
It is important to ensure the tower’s foundation is sufficient such
that the tower will withstand a horizontal load of 70 kg at the height
of the turbine.
In order to ensure that an acceptable blade to tower clearance is
maintained, a stub tower should be used between the D400 and
the free-standing tower. See illustration.
Roof Mounting
Due to its quiet, vibration-free operation, the D400 is
particularly suitable for rooftop mounting.
Mounting on buildings has the advantage of achieving
additional height. There is also often a localised increase in
wind speed due to the compression effect of wind flowing over
the ridge of the roof. This is particularly true when the
prevailing wind is at 90 º to the roofline. Generally speaking, a
mount height of 1.5 to 2.5 metres above the ridge line will
place the turbine in the best air flow.
It is important that the building structure and the mounting
bracket attachment is sufficiently strong to support the turbine
adequately in all wind conditions. Despite D400’s quiet,
low vibration operation, the installation may benefit from
additional, anti-vibration mountings to prevent the transmission
of vibration into the building structure.
Eclectic wall mount brackets, incorporating anti vibration
elements, are available - contact your dealer or Eclectic Energy
Ltd. for details.
Assembling the D400
Your D400 is supplied in two cartons. Unpack these and check
the parts against the list at the beginning of this manual.
Assemble the air rotor by sliding together the keys and
mortises at the hub of the five air blades.
Take the white, powder-coated hub plate, pass two 5mm bolts
and washers through the inner holes, and fit the rotor hub
spacer over the 5mm bolt heads.
With the body of the wind generator on its back, offer the hub
assembly up, and slide it onto the alternator shaft.
Align holes in rotor spacer with 6mm tapped holes in
alternator shaft and secure with two 6mm button head screws
and shakeproof washers provided.Tighten firmly using a nut
grade threadlocking compound to prevent the screws working
loose in operation. * Take care not to overtighten these screws
as this can cause the air rotor to run out of ‘true’.
An aluminium ring is provided to locate the blade roots
securely. The ring is inserted, rounded side first, into the
moulded annular recess on the rear of the blade roots.
Offer rotor blade assembly up to rotor hub spacer and slide into
Ensure that the rotor assembly is fitted the right way round.
The annular groove on the blade roots should face the rear (tail
end) of the machine, and the face with the 10 conical holes in
the blade roots should face forewards.
Fit outer stainless steel hub plate, place nuts and washers on
inner 5mm bolts and tighten gently.
Rotate air rotor in relation to hub until the five blade securing
holes align.
Pass a 5mm bolt through the inner powder-coated plate such
that it passes right through the rotor blade and outer hub plate,
fitting a washer and nut each time.
Finally, evenly tighten all fasteners.
Note that the rotor should only be secured using new nyloc nuts.
Assembling the D400 (continued)
Place the turbine face down on its rotor, and attach the tail
using the three M6 nuts and bolts provided. Note that the tail
should be fitted to the left-hand face of the casting flange
when the D400 is viewed from the rear. The large stainless
steel washers should also be fitted on the left-hand side.
To fit the nose cone, offer up the axial splits in the
moulding to the leading edges of the blades while holding the cone
square and central over the hub. Gently open each of the axial splits,
and encourage it to pass over the leading edge of the blades.
Finally, rotate the nose cone anti-clockwise such that it
effectively screws onto the blade roots. Snap the rear edge of the
blades slot behind the trailing edge of the five blades (see pictures).
Fitting D400 to the Tower
Remove the tower liner from the D400’s yaw shaft, and check it for fit
with the proposed mounting tower. It is far preferable to discover it
does not fit at this juncture rather than when you are actually
attempting installation. The standard tower liner has an outside
diameter of 41.5 mm and is designed to slide into standard
aluminium or steel scaffolding tubing with a nominal outside diameter
of 48mm and inside diameter of 42 mm.
Should the tower liner not fit the tower tube correctly, consider sourcing an alternative
mount tower or contact your supplier to order an alternative tower liner.
On no account attempt an installation where the tower liner is a ‘sloppy’ fit in the tower,
as this will lead to instability when the machine is operating, and could lead to
machine damage.
The tower liner is retained to the yaw
shaft by three grub screws. Once the
machine has been installed, the tower
liner should be secured by drilling two
holes through the top of the tower into the
tower liner to a depth of 12mm with a
4mm drill, finally securing with
two 8 x12mm self-tapping screws.
Your D400 is now ready for installation
Electrical Connections
Connecting cables between D400 and the battery bank or inverter should be appropriately
sized to minimise transmission losses. For low voltage machines transmission losses are
always a consideration, so it is advisable to keep cable runs as short as possible and be
prepared to use heavier gauge cable for longer runs.
Suggested cable conductor cross-sectional areas for a 12V machine would be:
0 - 10 metres cable
6 - 8 ²mm
10 - 20 metres cable
10 - 16 ²mm
20 - 30 metres cable
20 - 25 ²mm
For a 24 volt machine, the transmission losses are lower. Suggested cable sizes would be:
0 - 10 metres cable
2 - 3 ²mm
10 - 20 metres cable
3 - 5 ²mm
20 - 30 metres cable
5 - 8 ²mm
Note, cable sizing is always a‘trade off’ between the reduced electrical losses
associated with using larger cable, and the additional costs and difficulty of the installation.
The cable sizes recommended above will ensure acceptably high transmission
Where D400 is fitted to a tall mounting tower, ensure the weight of the hanging cable is
taken by a strain relief arrangement within the tower, rather than allowing all the weight
to hang on the D400 cable connection.
D400 is capable of producing very high currents. A line fuse must always be installed
in order to protect the D400. This is in addition to the fuses in the regulator output.
A blade-type 50 amp rated fuse and holder is supplied with 12 volt machines.
A blade-type 30 amp rated fuse and holder is supplied with 24 volt machines.
Note: This fuse should be installed between the turbine and the regulator and where a
braking switch is fitted, the fuse should be installed between the switch and the turbine.
Where D400 is being used for battery charging we strongly recommend that a regulator is
installed as part of the system. The regulator’s function is to prevent battery damage
through overcharging. The regulator works by sensing battery terminal voltage and as a
pre-set upper limit is approached, the regulator progressively dumps output from D400 to
a pair of large, foil-wound resistors, where the surplus energy is lost as heat.
The 6TB regulator unit usually supplied with the D400 incorporates a charge splitter so its
two outputs can be connected to two independent battery banks which will be charged
simultaneously. The regulator will preferentially charge the lower of the two banks first.
Note: each output of the 12V regulator is protected by a 40 amp blade fuse. The outputs
of the 24V regulator are protected by 20 amp fuses.
The regulator should be installed within 1 metre of the battery bank where possible and
the dump resistors mounted horizontally in an area where air is free to pass over them for
See wiring diagrams on pages 13 and 14.
Stopping the D400
The D400 is a robust machine and can safely be left operating in most windspeeds.
However, where extreme storm force winds are forecast, it is prudent to stop the machine
and secure the rotor blades with a rope lashing.
The D400 can be stopped by gripping the tail and turning the machine out of the wind,
securing the blades once they have stopped rotating.
Braking Switch:
A braking switch can be fitted which provides a convenient aid to stopping the D400.
The switch should be a double throw ‘break before make’ type, rated at least at
40 amps. When operated, the switch disconnects the batteries from the D400
before short-circuiting the turbine.
The short circuit slows the rotor blades making it easier to turn the machine out of the wind
and to secure the blades.
Please note: the D400 utilises a purpose-designed, highly efficient,axial field ironless
alternator. This configuration delivers exceptional power outputs coupled with smooth, low
friction running. These attributes are retained to some extent when the braking switch is
applied, and in consequence the electro magnetic braking effect is not as marked as with
other machines of more conventional alternator design.
In certain conditions, the rotor can overcome the braking effect altogether, which
results in damagingly high currents being produced in the stator windings.
For this reason the braking switch should only be used to slow the unit prior to
manually stopping it. It is not a parking switch. If the machine is left to run with the
braking switch engaged, serious damage can occur to the generator.
The braking switch should only
be used to slow the unit prior to
manually stopping it and
securing the airblades with a
If the machine is left in high winds
with the braking switch engaged,
serious damage can occur.
Electrical Installation
Single battery bank
It is recommended that the
D400 is hard wired to the battery system.
In yacht installations, the cable should enter the yacht via
a cable gland.
Deck plugs and sockets should not be used as they
represent a shock hazard if they accidentally become
The D400 should always be
connected to a battery when in
use, otherwise a dangerously
high voltage can be generated
at the output cable.
*For fuse sizes,
see note on page 11.
Unregulated installation
If in doubt, refer to a competent
electrical engineer or the manufacturers.
Electrical Installation
Connect the output cable to the battery bank(s) using
the suggested wiring diagrams for guidance.
Remember to observe the correct polarity.
Where a battery monitor
is fitted
Twin Battery Bank Installation
If your electrical system is fitted
with a digital battery monitor, it
will be driven by a shunt which is
typically installed close to the
One side of the shunt is
connected directly to a battery
All other connections are made
to the opposite side of the
shunt, or a busbar associated
with it.
The shunt is most usually
connected in the negative line.
When wiring the D400 to a
system fitted with a shunt,
observe polarity and connect the
appropriate D400 output
cable to the non-battery side of
the shunt.
Again observing polarity, the
other D400 output cable should
be made directly to the battery
The D400’s output will now pass
through the shunt and the
battery monitor will display a
If the shunt is bypassed by
connecting both positive and
negative output leads from the
D400 directly to the battery, the
meter will fail to ‘see’ the D400,
and register no output.
*For fuse sizes,
see note on page 11.
The D400 is fitted with 4.5 ²mm output fly leads
Refer to page 11 for suggested connection cable sizes
Performance and expectations
The D400 is extremely efficient by design, making it the most powerful and productive
wind generator of its rotor size currently available.
The D400 should perform in line with, or exceed, the values given in the output graph.
When verifying system performance, it is important that wind speed measurements are
taken at the same height as the turbine, and that the batteries are at least 40% discharged.
Note also that if a regulator is installed as part of the system, dumped output will not be
seen by shunt-sensed battery monitors.
Should outputs be well below expectations, first suspect turbulence in the wind stream.
Turbulence at a given site can be specific to a particular wind direction where it is
caused by an obstruction either up or downwind of the turbine. When the wind direction
changes, and the obstruction is no longer in line with the turbine, outputs may return to
expected levels. If the turbulent wind stream is not from the prevailing wind direction,
this may not be important. Alternatively, the D400 could be re-sited or raised in height.
If poor output cannot be attributed to site conditions, re-check the whole installation
against the wiring diagram and also look for poor or loose connections.
Check that the relevant connection from your D400 to the batteries is made to the nonbattery side of the battery monitor shunt. If the connections are made direct to the
battery terminals, bypassing the shunt, the ship’s battery monitor will not be able to read
the D400’s output.
Note, where batteries are in a good state of charge, power diverted by the regulator to
the dump resistors will not be seen by the battery monitor.
Finally, ensure that the battery bank is in good condition. Check individual battery
terminal voltages within the bank. Defective cells within a battery bank are a common
cause of poor charging performance.
Note that there is a short period of ‘running in’ with a new wind turbine. The bearings
and shaft seals of a new machine take 40 – 50 hours of operation before mechanical
friction falls to its design level. As a result, your D400 may seem a little slow to respond
in light winds until this ‘running in’ period has passed.
Before deciding that your D400 is faulty, please work through the ‘trouble shooting’
guide on page 16. In our experience, 9 out of 10 problems reported prove to be faults in
the installation rather than a problem with the turbine itself.
Please feel free to contact your dealer or Eclectic Energy Ltd. if you require additional
advice or guidance.
D400 Trouble-shooting – Points to check if you think there’s a problem
Mechanical checks:
Spin the air blades by hand - they should rotate smoothly and freely with no hard spots.
Listen for any grinding, scraping or rumbling noises - these would indicate failed bearings
or contact between rotating parts inside the alternator.
Note: if the air rotor rotates smoothly and silently, but feels stiff (like turning something in
glue), refer to the electrical section on short circuits.
Next, try rotating the D400 around its yaw axis. Again, it should turn smoothly and freely
with no hard spots. If the yaw action is stiff or accompanied by undue noise, suspect the
yaw bearings or the bush and slip ring assembly (see electrical section below).
Check that the air blades are fitted the right way round, with the concave surface facing
forward, i.e. towards the wind.
Also, establish that the air hub is secure on the alternator shaft and that the air rotor does
not ‘wobble’ due to wear at the hub.
Finally, check that all fasteners are tight and secure.
Electrical checks:
Very often poor turbine performance is traced to a problem elsewhere in the installation rather
than a fault with the wind generator itself.
First check that both the D400 and the regulator are the correct voltage for the electrical
system. Both items have identification labels showing the voltage, typically 12 or 24 volt.
The most common cause of low outputs are loose or corroded connections in the output
cabling. Check and re-make all connections from turbine to battery. Seawater and
electricity are not a good combination, and connections deteriorate very quickly when wet.
Next, check the turbine by measuring its open circuit voltage. Disconnect the unit as close
to the turbine as possible. If it is not too difficult, remove the turbine from its tower and
measure at the fly lead cables exiting the yaw shaft of the machine itself.
With a multi-meter set to the 20 volt DC range, connect the red positive meter lead to the
red output, the black meter lead to the black output, and spin the unit by hand. On a 12V
D400, you should be able to produce 4, 5 or even 6 volts, depending on how hard you spin.
If you see voltages in this range, then the D400 is probably OK. If the D400 has an internal
fault such as a missing phase in its alternator, then you will not be able to produce more
than one or two volts.
Assuming the output voltage is OK, try rotating the yaw shaft (where the cables exit) whilst
continuing to spin the rotor. If the voltage varies or disappears as you rotate the yaw shaft,
the brushes and slip rings require cleaning. Equally, if the voltage remains steady, but the
yaw shaft is unduly stiff or squeaks when rotated, the brushes and slip rings would benefit
from cleaning.
If the turbine checks out OK on the voltage test, suspect the rest of the installation. Check
each wiring connection for corrosion, tightness and security as well as the fuses, fuse
holders etc.
If a regulator bypass switch is incorporated within the installation, check that this is wired in
accordance with the diagram contained in the D400 regulator instructions. Note that a
similar switch can be used as a braking switch, and the wiring for this is shown on page 12
of the D400 User's Manual. Ensure that the two options have not been confused.
Note that the ship's battery monitor is driven by a shunt, which will be mounted close to the
batteries. Ensure the D400 is connected to the non-battery side of the shunt. If it is not,
then the D400 output will not be seen by the meter.
Also, the D400 regulator incorporates a charge splitter (i.e has two outputs). If one of these
is connected to the service battery bank and one to the cranking battery or windlass
battery, it is possible that power from the D400 is flowing to them in preference to the
service bank. Try connecting both regulator positive outputs together and on to the service
bank to see if that improves matters.
Finally, put a dedicated ammeter in the positive line between turbine and regulator. This
should read all current from the D400, including any diverted to the regulator dump loads.
Trouble-shooting continued - Poor Yaw Action:
Stiffness in yaw; the D400 will not rotate to face the wind
– check for any physical obstructions and the action of the yaw shaft. If the yaw
shaft does not rotate freely, suspect damaged or corroded yaw bearings, damaged
or corroded slip rings/brush assembly or possibly a bent yaw shaft.
Erratic yaw action; the D400 turns off the wind and is unstable
– the D400 is normally very stable in yaw. If the turbine appears to ‘hunt around’ its
axis, this could be due to turbulence in the airflow. If so, the problem should
disappear when the wind changes direction or the yacht is in a different location.
Check that the D400 is properly secured to the mount tower. There should be no
undue play between the turbine and the tower. Also, ensure that the tower is
vertical and sufficiently rigid. If the tower is too flexible and bends excessively
under wind loading, it should be braced or guyed to stiffen it.
Open Circuit; this is a major cause of poor yaw action, indicating that the turbine is
not properly connected to the batteries.
- in this open circuit condition, the air rotor will over speed and the air blades will
become uncharacteristically noisy, emitting a whistling noise. The D400 will
frequently turn off the wind, rotating through 360 ° on occasion. Check all wiring,
looking for poor or broken connections. Also check fuses. If the fault remains,
bypass the regulator to rule out regulator malfunction as the cause of the problem.
Intermittent or occasional erratic yaw action
– this could be due to an intermittent electrical fault. If you observe turbine output
abruptly dropping out and then suddenly returning, this could indicate a poor
connection between the brushes and slip rings.
To service, remove the four self-tapping screws that secure the black brush-holder
plate. Remove the brush-holder plate, taking care not to displace the brushes or
brush springs.
The slip rings and contact faces of the brushes can then be cleaned with a solventsoaked cloth or fine, wet and dry paper.
Squeaking or grating noises audible in yaw
– this could be caused by damaged yaw bearings. More typically, it is caused by
dirt or corrosion on the slip rings/ brushes.
Remove the brush-plate as above. If noise is still present with the brush-plate clear
of the housing, suspect yaw bearings. If the squeak has gone, it confirms the noise
emanates from the brush and slip ring assembly. Clean these parts as in the last
section. Also, using a fine file, remove any sharp edges from the contact surfaces
of the brushes.
On re-assembly, the yaw shaft should rotate silently. If a squeak is still evident,
remove the brush plate again and spray the slip rings and brushes with an
electrical lubricant (WD40 or similar) or smear a little silver-loaded grease on the
slip rings.
Undue mechanically transmitted noise or vibration
Noise or vibration transmitted down the shaft
– suspect a loose air rotor. Grasp an air blade and rock the rotor to check if there is
any relative movement between the air rotor and the alternator shaft. If play is felt,
remove hub parts and re-build, fitting a new hub liner.
Correct fit of nose cone
– check that the nose cone is not catching on the alternator housing.
Air blade damage
– check that the blades are not damaged or chipped. This may put the rotor out of
balance. Replace air blades as necessary.
Tail bolts
– check tail bolts are tight.
Noises from the alternator
– rotate the air blades slowly and listen at the alternator housing. Grating or
scraping noises indicate a fault within the alternator.
Refer to your dealer or Eclectic Energy Limited.
Routine Maintenance
The D400 is robustly engineered and should give years of
trouble-free service.
Bearing life in normal windspeed conditions is expected to be in
excess of 10 years. Shaft seals may benefit from replacement
after five years.
The yaw bearing brushes should not require replacement
during the life of the machine.
The alternator itself is hermetically sealed against moisture
Routine maintenance would consist of
periodically examining the air blades for
signs of damage. Blades exhibiting
chips or nicks should be replaced.
We declare that this product complies with the
following standards/directives:
Product description: D400 Alternator
Model number: EE400
Serial number:
Eclectic Energy Limited
Edwinstowe House
High Street
United Kingdom
NG21 9PR
+44 (0) 1623 821535
The D400 Wind Generator is guaranteed against faulty parts and manufacture for
a period of two years from date of purchase.
The unit should be returned prepaid to:
Eclectic Energy Ltd Edwinstowe House High Street Edwinstowe
Nottinghamshire United Kingdom NG21 9PR
Damage caused by mishandling, faulty installation or accident is not covered.
Eclectic Energy can not be liable for damage caused by the D400 in the event of
accidental contact, incorrect installation or insufficient care.
However, Eclectic Energy Limited is committed to provide after sales care as fully
and efficiently as possible in order to support our customers.
This guarantee does not affect your statutory rights.
D400 Specifications
Rated Power (W)
Max. power (W)
Rated Wind Speed (m/s)
Rated rotational speed (RPM)
Cut-in wind speed (m/s)
Cut-out wind speed
Turbine type
Number of blades
Airfoil type
Diameter of turbine (m.)
Swept area (sq. m.)
Tip speed ratio
Typical noise level
Voltages available
Yaw System
EMI (electromagnetic
Control system
Brake system
Stub tower
Colours available
225 @ 11 m/s (22 knots)
400 @16 m/s (30 knots)
500 +
1200 @ 16 m/s
2.6 (5 knots)
Horizontal upwind
Low Reynolds - variable camber
2 - 6 dbA over background
Glass-filled nylon
Direct Drive
12 pole PMG
3-phase AC
Output DC
High energy ferrite magnets
Encapsulated stator
12, 24, 48, 72 DC
240V AC Grid connect via inverter
Alloy housing, hermetically sealed
Alachrome and polyester powder coat
316 S/S shafts
C.E. compliant
Stall regulation
Braking Switch
Low resonance, formed aluminium tail
Slip ring assembly with saddle spring
loaded output brushes
50mm O/D - 42mm I/D
17 kg.
White with white blades
Black with translucent blades
Annual kW hours
Average wind speed (m/s) at 10m
Estimated Annual generation (AEP) for D400/ StealthGen