About The Rutland 914i Windcharger

(8 customer reviews)


The Rutland 914i punches well above its size for power, rivalling the claimed outputs of larger turbines owing to it’s built-in MPPT technology. This continuously matches the turbine speed and generator to their optimum performance to deliver more ampere hours into your battery ……and a by-product of this optimised efficiency is a virtually silent wind turbine!

Part No: RUT-914

Performance of the Rutland 914i

Click on the tabs to find out more

We publish our curves based on measured data and use ongoing actual performance data collected and monitored over long periods of time of the turbines running in clear and real wind conditions. This means the turbines are also subject to side winds, upwinds and sudden changes of wind direction (these are the causes of turbulence) experienced at a user’s typical installation. Our curves represent a truer reflection of the power output you can expect from your Rutland Windcharger compared with many other turbines.

A power curve is usually given by manufacturers to represent the performance of a wind turbine. Some may be based on theoretical or predicted output and others plot the power achieved under steady state conditions. Wind tunnel testing and turbines run on vehicle rooftops can provide useful information for a manufacturer but power curves derived in this way need to be understood as running in a clear and unobstructed wind flow so they do not represent what is actually achieved in real wind conditions. Power curves from theoretical analysis cannot be regarded as representing what is actually achieved at all.

A more useful guide of how much power you can expect from your turbine is the Annual Energy Yield. That’s because wind energy is a “cube law,” which means that when the windspeed doubles the power potential is 8 times! Check the Annual Energy Yield bar chart which uses the Rayleigh distribution to calculate the Ampere hours of battery charging you can expect at given average wind speeds per annum. As these are averaged across the year you should consider how these figures will ebb and flow across the seasons when you might expect a higher average during the windier seasons. We often recommend the combination of wind and solar charging to smooth out the daily energy yield.

Rutland 914i Specifications

Cut in Windspeed 3 m/s
Output Voltages Available (Nominal) 12V 24V
Power / Current Ratings:
5m/s     10knots 24W(1.7A) 24W(0.8)
11m/s   21knots 143W(10.3A) 143W(5.1A)
15m/s   29knots 262W(18.9A) 262W(9.4A)
Packed Weight & Dimensions 13.1kg 370 x 300 x 450mm
Generator Type Low friction 3 phase, brushless
Yaw Rotation Slipring for 360° free rotation. Low brush wear.
Governing Devices None
Turbine Diameter 910 mm
Turning Radius 557 mm
Net Weight 11.58 kg


We construct our Rutland wind turbines using a range of modern and traditional high quality materials which are designed to endure in a marine environment. We have innovated in our field by introducing light weight but robust high density nylon and glass reinforced materials that are UV stable alongside marine grade aluminium, stainless steel, sealed for life bearings and other carefully selected and precision worked materials in our UK factory.

Battery Management

Rutland 914i Marine Bundles

Rutland 914i

Solo Kit


Buy 12VBuy 24V


  • Rutland 914i (12V or 24V )
  • Marine Mounting Kit
  • Marine Stays Kit
  • HRSi Regulator (for single battery bank)

Rutland 914i

Duo Kit


Buy 12VBuy 24V


  • Rutland 914i (12V or 24V )
  • Marine Mounting Kit
  • Marine Stays Kit
  • HRDi Regulator with built in display (charges dual battery banks and allows input of up to 160W of Solar)

Rutland 914i

Duo Expert Kit


Buy 12VBuy 24V


  • Rutland 914i (12V or 24V )
  • Marine Mounting Kit
  • Marine Stays Kit
  • HRDi Regulator with built in display (charges dual battery banks and allows input of up to 160W of Solar)
  • HRDI Remote Display

*Cable not included. Cable specification is subject to required length.

Cable for Windcharger to Controller

902-036 2.5mm² OceanFlex-  2 Core Cable (per meter) £3.85
4mm²  – 2 Core HO7RN-F Cable  (per meter) £5.45

Controller to Battery

902-025 4mm² –  Red Cable (per meter) £2.80
4mm²  -Black Cable  (per meter) £2.80

Our Guarantee to You

Rutland Windchargers are designed, developed and manufactured in the UK by Marlec.  We warrant our products for 2 years from date of purchase.  With over 35 years of experience in our field we continuously develop designs and materials to ensure our products withstand the rigours of the testing environments that our customers put our Windchargers through.  You can buy with confidence that our products will endure, will meet our claimed specifications and that you are buying a product that has sold, in its versions, worldwide in excess of 100,000 units fully supported by our sales and engineering teams here in Corby, UK.

8 reviews for Rutland 914i Windcharger

  1. Roland Dannion

    On my previous sail boat I installed a Rutland 913. I use Rutland 914 on my current sailboat since 2011 without problèm . Now , 10 years later it is time to change the roller bearings which start to be quite noisy. Very good equipment .

  2. Glen Hogg

    I have to congratulate the technical and after-sales team at Marlec for their excellent customer service. Marlec is clearly a company who value good customer relations and who are serious about maintaining their good reputation as a market leader in their field. Thank you.

  3. Ian

    I’ve had a Rutland 914 up the mizzen mast of my ketch for FIFTEEN years without fault it has trickle charged my batteries day And NIGHT which is an important consideration for live aboards !

    I’m now looking for a replacement ( has to be marlec ) as the unit has finally died in extreme conditions – 60 plus knots of wind and a white squall – A quality product !

  4. David Uhlar

    I’ve been using Marlec equipment on boats now for almost ten years and can’t praise them highly enough. They have a fully integrated suite of products which all work well individually and interface together properly. I admit to expecting a lot from the kit , but Marlec have knowledgable and experienced support staff who have always been happy to help. Physical support and maintenance has been a very smooth process and you can rely on it being very quick, which really counts in the sailing game. There is also the comfort of being able to rely on top qulaity equipment which is both designed and manufactured in the UK. would hve no hesitation to recommend Marlec equipment to anyone contemplating off grid generation for their boat

  5. Liz Gee

    Just a short note to say how pleased we are with our Rutland wind generator. We had it fitted in conjunction with a solar panel. We no longer worry that we will not have enough energy. When we leave the boat we always return to charged batteries. We also know we always have charged batteries without having to return to shore power. The generator is extremely efficient and quiet!

  6. Kit Dawson

    We love ourm914i!
    We are land based in rural NSW.
    THE 914i complements our solar array perfectly!
    It has been in operation for a few years now,we love it so much we are wanting another!
    Marlec/Rutland is a name to trust, we will not settle for less!
    Apsley Vale

  7. G Morgan

    Now that we are living aboard we are so pleased with the Rutland 914. We have the fridge, C90W chartplotter and AIS as well as Autopilot and nav instruments on whilst sailing and so far have not run down below 12.9 volts. The Rutland does what it says on the tin.

  8. S Desormes

    I would like to say how much the Rutland setup has revolutionised our sailing. Never having to worry about flat batteries is priceless & I would not have another boat without one.

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