Eclectic Energy Limited

Eclectic Energy Limited

- Model 3 - Combined Water and Wind Generator


The DuoGen 3 is a popular combined system of charging with wind and water. It allows you the opportunity to charge efficiently while under sail by lowering the unit into the water, or allow for use as a wind generator while anchored. The DuoGen is specifically designed for the cruiser who is an avid sailor whose main purpose is water generation with the added convenience of wind generation. If your main power generation is through wind, the D400 is your better choice. To change between wind and water generation is fast and simple and without tools. Parts can also be conveniently stowed if need be by dismantling the rotor blades, self-furling protection in high winds as well as the Eclectic Energy’s famous robust construction.

The new DuoGen 3 has a high strength carbon fiber drive shaft, enhanced castings and mouldings and has been designed and refined over thousands of nautical miles under all sea states.

The DuoGen is purpose designed to provide a truly practical solution to battery charging on cruising yachts. DuoGen’s dual mode means that the same machine operates as a wind generator and a water-powered generator.

Water Mode Performance:

  • 8 amps @ 6kts. (100W), 190 Ah per day
  • 11.5 amps @ 7kts. (150W), 275 Ah per day
  • 16 amps @ 8 kts. (200W), 380 Ah per day

Wind Mode Performance:

  • 2.5 amps @ 10kts. wind speed (30W)
  • 6 amps @ 15kts. (75W)
  • 11 amps @ 20kts. (140W)

DuoGen -3 combined water and wind generator

  • On- board electricity generation with DuoGen-3
  • Water mode on passage
  • Wind mode at anchor
  • Mode change in seconds without tools
  • Supplied complete with mount hardware

New for DuoGen – 3

  • Best ever DuoGen
  • High strength carbon fibre drive shaft
  • Enhanced castings and mouldings
  • Design refined over 1000s of sea miles

Water mode performance

  • 8amps at 6 knots (100W) 190 Ah per day
  • 5 amps at 7 knots (150W) 275 Ah per day
  • 16 amps at 8 knots (200W) 380 Ah per day
  • Minimal loss of boat speed
  • Easy to deploy and recover
  • Proven in all sea states
  • Can provide all the power for a yacht on passage

Wind mode performance

  • 5 amps at 10 knots wind speed (30W)
  • 6 amps at 15 knots wind speed (75W)
  • 11 amps at 20 knots wind speed (140W)


  • Available in 12 and 24 volt versions
  • System weight at deck level
  • Low noise, slow revving air blades
  • Air rotor dismantles for stowage
  • Self-furling protection in high winds
  • Robust construction
  • Three tower length versions to suit yachts of all types and sizes
  • High speed water impeller available for faster yachts and multihulls
  • Low maintenance and full range of spares available
  • 12 months warranty


  • To prevent battery damage through overcharging, we recommend a charge regulator is installed with the DuoGen. The recommended regulator is a dump type with an integrated charge splitter, enabling the charging of two independent battery banks at the same time.

The DuoGen was specifically designed to maximise zero carbon electricity generation on cruising yachts. The DuoGen’s unique wind/water capability works best where cruising yachts are making frequent or long sea passages, interspersed with periods at anchor or in harbour.

The DuoGen should perform in line with the values given in our published output graphs. However, when monitoring the system, external factors can effect performance, and that may lead you to falsely conclude that there is a problem. To assist in accurate evaluation, particularly in relation to wind mode, be aware of the following:

When monitoring the wind mode, wind speed measurement should be made at the height of the turbine rotor. Where a mast head anemometer is used, there will be significant wind shear, and it is not unusual for wind speed measurements at turbine level to be 30-50% lower than at the masthead. This is particularly true in harbours and marinas.

When measuring performance, battery state is also important. Fully charged batteries do not readily accept current, and where a charge regulator is fitted, any dumped power will not be registered by the ship’s battery monitor. In addition, where batteries are fully charged, or the regulator is ‘dumping’, the load seen by the DuoGen’s alternator changes. This makes the alternator ‘stiffer’ to turn, which in turn increases the force which furls the turbine. The increased furling angle reduces the intercept area of the DuoGen’s air rotor which in turn lowers the electrical output.

When evaluating the DuoGen’s air mode, try to ensure batteries are 30 – 40% discharged, or alternatively switch on numerous electrical loads in order to pull the battery voltage down.

If wind mode outputs remain 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 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. Also, check fuses and fuse holders.

Finally, ensure that the batteries are in good condition and of sufficient capacity. We recommend a minimum of 300 Ah for use with the DuoGen.

If you still suspect a problem with the machine, consider the following:

Do the air blades spin freely? The air rotor should spin without any undue noise or friction. If not, is there a braking switch engaged or could there be another short circuit in the output cables? (Make sure you disconnect the batteries before trying to find out!)
Is the DuoGen free to move about its yaw axis? It should move easily with no undue noise or friction.

If in doubt, please contact us.

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 DuoGen may seem a little slow to respond in light winds until this ‘running in’ period has passed.

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