• Low TSR rotor blades with excellent low wind speed performance, and exceptionally low acoustic emissions. Rotor blades are injection moulded for excellent consistency.
• Rated at just 8m/s for superb low wind speed performance.   A Wren Micro-turbine will generate more Kwh’s at low wind speeds!
• Unique ironless generator design has no ‘cogging’, which allows effortless start-up in low winds and reduces ‘generator hum’.
• The 3-phase output from the generator is rectified onboard for a DC output.
• CNC machined components throughout.
• Constructed from powder coated / anodized aluminium and stainless steel.
• Aesthetically pleasing and low visibility profile.
• Mercury free yaw slip-rings prevent the output cables from becoming twisted as the turbine tracks the wind
• Oversized tail fin for excellent response to turbulent wind conditions
• Designed to run through severe weather conditions
• Unique bearing configuration resulting in low friction, low bearing noise. All bearings a lubricated and sealed for life
• Anti-vibration fixings used throughout.
• All-up weight of just 5.5kg

Wren Micro-turbine

The Wren Micro-turbine is a small 1 metre diameter direct drive micro-turbine designed for use in many difficult and demanding applications. Its aesthetic low profile design, coupled with its unparalleled low wind regime performance and low rotor acoustics make this turbine the ideal choice – whatever your application – From electric fencing to CO2 abatement or off-grid homes.  

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Click here to see the Technical Specification

Click here to see the User Manual

The innovative and versatile micro-turbine designed for superior performance at low wind speeds.

Available in 12V or 24V

Price: £475.00  (including VAT)

Wren Extreme

Wren Extreme is a Wren Micro-turbine variant with key component changes to make the unit perfect for use in marine and industrial applications. Key component upgrades include a new yaw pivot and bearing arrangement to allow the turbine to cope with the large forces involved with a pitching a rolling vessel on the open ocean. Other upgrades include ingress protected slip-rings and anodised bearing housings for protection against saltwater corrosion. A new stator configuration with advanced cooling further allows the turbine to run through 'big winds' without worry of burn-outs or failure.

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Available in 12V or 24V

Price: £555.00  (including VAT)

Wren Mistral - 1KW

Mistral is our intermediate turbine with a rotor diameter of 2.0 metres and is capable of generating up to 1000watts of power. Mistrals high maximum power output is complemented by our traditional outstanding low wind speed performance. On a site with a good average wind speed Mistral will provide significant amounts of energy. Mistral is equipped with the same design features as our Wren Micro-turbine range with the addition of tilt-rotor furling systems for self protection during high winds and high voltage power transmission that means smaller a cheaper cabling can be used to transmit the power over long distances from the turbine with less energy loss. The high voltage power is then converted to low voltage DC power with our Power Conditioning Unit so the turbine maybe used to charge deep cycle battery banks or grid-tie inverters. Excellent design, outstanding build quality and proven reliability is included as standard.

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Available in 12, 24 and 48V

Price: £995.00  (including VAT)

Wren Merlin 2.5KW - NOW AVAILABLE

Merlin is currently the largest turbine in our product family with a rotor diameter of 3.5m and a maximum power of over 2500watts. Merlin follows our proven and successful design philosophy and low wind speeds performance is key to this. On an installation site with a good average wind speed and little turbulence, Merlin is capable of providing most, if not all, of an average UK households power requirement. In some cases it may be appropriate to export any excess energy to the national grid via an export meter. Our Merlin turbine is real value for money and we are proud to bring a turbine of this capability, quality and low cost to the market. Payback times for this turbine are short, making micro-generation using small wind turbines an incredibly attractive proposition.

GRID TIE VERSION OR BATTERY CHARGING VERSION, 12V, 24V OR 48V

Wren Guyed Tower Kit

The Wren Guyed Tower Kit is a cost effective, user friendly mounting solution for your Wren Micro-turbine. The tower kit can be installed in as little as 1 hour by a single person and is capable of providing tower heights of up to 7.5 metres. The kit components are manufactured from heavy duty steel which is then powder coated for corrosion protection. Helical earth anchors allow easy fixing of the guy wire rigging which is all provided in the kit. A length of scaffolding pole of 48.3mm steel circular hollow section is needed to provide the main tower section. The Wren Guyed Tower kit can be erected or lowered in seconds giving easy access to the turbine.

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A cost effective mounting solution for heights up to 7.5m.

Price: £655.00  (including VAT)

Wren Building Mount Kit

This mounting solution can be used to mount the Wren Micro-turbine to an existing structure or building. The mount kit is manufactured from heavy-duty steel, industrial vibration isolation materials, all of which are zinc plated and powder coated for excellent resistance to weathering. The mount kit is designed for a number of fixing options, and can withstand high wind loadings on the Wren Micro-turbine. A main tower length of up to 3 metres can be used by employing standard 48.3mm diameter circular hollow section (not supplied)

Unsuitable for use with friable mortar, sand lime mortar, aerated concrete blocks.

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Click here to see the User Manual

Used for fixing to an existing structure or building, incorporating industrial standard anti-vibration mountings.

Price: £655.00  (including VAT)

Mistral Guyed Tower Kit

The Mistral Guyed Tower Kit is an extremely user friendly and cost effective mounting solution for our Mistral turbine. The kit provides all the structural and hardware components required to get your Mistral up and flying in no time at all. Minimal ground work is required to complete the installation and the guy wires are fixed using innovative helical earth anchors. The tower kit also uses a large 89mm (3.5") steel section making the tower extremely robust. The standard tower kit is available as 7.5 metres high and an expansion pack is available to increase the tower height to 12.5 metres. The structure is hot dip galvanised and all fixing and rigging hardware is zinc plated giving excellent corrosion resistance. The tower base has a gin-pole provision so that a gin-pole may be added to aid in the erection and lowering of the tower. The unique 3 guy wire configuration reduces the overall footprint of the tower so less ground space is used.

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Price: £655.00  (including VAT)

Mistral Free Standing Tower

The Mistral Free Standing Tower is a 7.5 metre high lattice work tower with no need for guy wires. This make the tower perfect for installing a Mistral turbine anywhere that space is a premium or guy wires are unsuitable. The tower is equipped with a manually operated winch that allows the tower to be erected or lowered with ease.

The Mistral Free Standing Tower will be available in May 2007

Price: £1400.00  (including VAT)

30A Shunt Charge Controller

Our 30 Amp Shunt Charge Controller is a feature packed yet compact charge regulator for the Wren Micro-turbine. The unit does not require dump loads as it operates by using Pulse Width Modulation Shunt techniques to prevent the battery bank from overcharging. The unit features LED displays for both the battery state of charge and the overall system status. Further features include a automatic load disconnect and reconnect to prevent your battery bank from becoming discharged too deeply. Rather than regulating the battery charge based upon voltage readings, the unit uses a unique control system which also takes into account ambient temperature to calculate the battery banks true state of charge. This helps ensure the maximum working capacity and lifetime of your battery bank. This unit is suitable for flooded lead acid or gel type batteries.

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Price: £110.00  (including VAT)

Our range of air heating resistive dump loads are suitable for use with many diversion charge controllers (which we also supply). The dump loads are available in 250watts, 500watts or 1000watts and a selection of different voltages depending on your requirements. The units are housed in a thermally resistive enclosure which high temperature ceramic terminals. The heating elements are housed behind an aesthetically pleasing air convection unit which is powder coated for maximum longevity.

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Available models:

30A.  Price: £110.00  (including VAT)

45A.  Price: £190.00  (including VAT)

60A.  Price: £235.00  (including VAT)

In optimum conditions, with an average wind speed of just 12mph, a single Wren Micro-turbine could generate as much as 40KwH per month of free and clean renewable energy. That represents a CO2 abatement of 18Kg’s per month.

If just 1000 Wren Micro turbines were in service, a potential 216,000 Kg’s of CO2 emissions would be prevented from reaching our atmosphere in a single year. Our larger products, Mistral & Merlin, have exponentially greater power capacity and will be able to make a significant or total contribution to your power requirements. Please visit our ‘Products’ pages for more details.

As worldwide energy prices continue to increase, the financial incentive to install a micro-generation system will become very significant!