Supporting the Clean Energy for EU Islands Initiative

We proudly announce that WES is now one of the Supporting Organizations of the Clean Energy for EU Islands Initiative.

We share the ambition of the EU islands initiative to support islands communities to enhance their wellbeing and resilience by assisting them in realising their transition to clean energy resources.

Specifically, we will work towards:

  • Supporting the members of the Clean Energy for Islands Initiative with our expertise and experience;
  • Ensuring relevant and accurate advice for the island communities to proceed with their Clean Energy Transition Agendas, and subsequently with their decarbonisation plans and financing concepts;
  • Supporting exchanges and share knowledge, experiences, best practises, tools or resources relevant to the members of the Clean Energy for Islands Initiative;
  • Collaborating with other Support Organizations of the Clean Energy for EU Islands Initiative to strengthen islands communities, and foster their joint and coordinated clean energy action

We are ready to put our specific expertise and experience at the service of the islands’ full decarbonisation. The path towards full decarbonisation of EU islands requires concerted action and an collective effort, and we are delighted to join the Community of committed EU islands and Support Organisations to manifest that a clean energy future for EU islands and beyond is possible.

Take a look at the Clean Energy for EU islands website for more information about the Support Initiative.


Eerste ‘Volksmolen’ op Windpark Zijpe is een succes!

Windpark Zijpe, het eerste commerciële windpark van Noord-Holland dat sinds 1992 duurzame energie opwekt. De laatste jaren had dit park een ietwat treurige aanblik doordat maar liefst 3 van de 9 oude turbines stil stonden. Na 25 jaar duurzame energie te hebben geproduceerd zijn deze turbines ‘einde latijn’.

Op initiatief van Kennemerwind (coöperatieve-eigenaar Windpark Zijpe) en Wind Energy Solutions uit Spanbroek, is het Volksmolen-project opgestart, waarbij één van de drie stilstaande turbines zou worden vervangen door een nieuwe turbine van exact hetzelfde formaat maar met een hogere opbrengst. De nieuwe turbine is begin december 2019 geïnstalleerd waardoor de eerste Volksmolen een feit is. En dit allemaal dankzij de lokale gemeenschap. Samen, lokaal, duurzaam investeren!

Tijdens de start van het duurzame project werd in Burgerbrug (Gemeente Schagen) een eerste informatie-avond gehouden waarbij de ruim 70 aanwezigen werden geïnformeerd over ‘de Volksmolen’, een postcoderoosproject waarbij huishoudens, bedrijven en verenigingen uit de directe omgeving de mogelijkheid kregen om een zogenaamde ‘windkavel’ te kopen in de Volksmolen. Een oude stilstaande windmolen wordt hiermee vervangen door een WES 80, een nieuwe wind turbine van exact dezelfde hoogte, met exact dezelfde rotoroppervlakte, maar met een hogere opbrengst in energie dan de oude turbine.

15 jaar lang goedkope energie
De diverse deelnemers die een windkavel hebben gekocht krijgen 15 jaar lang vrijstelling van de energiebelasting op elektriciteit. Op deze manier is elke deelnemer gegarandeerd van 15 jaar goedkope energie, die ook nog eens lokaal is opgewekt. Een win-win-situatie.

Veel animo voor windkavels
Na diverse informatieavonden te hebben georganiseerd in onder andere Burgerbrug, Schoorl, Bergen, Groet, Petten en Koedijk bleek de animo voor windkavels onder de lokale geïnteresseerden groot te zijn. Een signaal dat lokale duurzaamheid leeft in deze omgeving. Al vrij snel waren de windkavels uitverkocht en kon de nieuwe windturbine worden besteld.

En sinds begin december 2019 is het zover, de allereerste Volksmolen is gerealiseerd. Dit allemaal dankzij de lokale gemeenschap met een hart voor groene energie uit de directe omgeving.

Heeft u interesse in een soortgelijk wind-project in uw regio? Neem vrijblijvend contact op met Sjoerd Overpelt, projectleider van de Volksmolen.

Sjoerd Overpelt
06-83 52 38 56


Alec received his Propaedeutic diploma

We are happy to announce that our trainee Alec has received his propaedeutic diploma. Actually he already achieved it in January this year, but yesterday he could sign it.  Read below how he’s doing at WES untill now!

‘Up to now, I am really enjoying my traineeship at WES. My colleagues are friendly and I work in a ambitious and progressive ambiance. WES is offering me enough challenging assignments and responsibilities. For example, we will be exhibitors at the Agribex exhibition at Brussels Expo on 3 to 8 December. It is my task to organize a stand for WES and I have to manage all the things around this fair. I will be present at this fair as well, so you can meet us there! Looking forward to meeting some of you.’

We will be at the Key Energy Exhibition in Rimini, Italy (5-8 November) as well. Read here were you can find us at this exhibition.



Maarten Stand

WES at the Key Energy Expo Rimini 5 – 8 November 2019

WES will be attending the Key Energy Expo 2019, the leading fair for renewable energies in the Mediterrean area which will be held from 5 to 8 November at the Rimini Fiera in Rimini, Italy.

Please come and visit us at our stand, stand number 189 in the Key Wind department, hall D7.

Key Energy has been Italy’s leading exhibition for Energy and Sustainable Mobility for the last 13 years.
Along with Ecomondo, the international exhibition for material and energy recovery and sustainable development, Key Energy forms the most important platform in the Mediterranean basin for European and international green strategies and solutions.

The parallel organised Key Wind Exhibition is the only reference wind power show in the Mediterranean basin, the Balkans and the Middle East.
Key Wind, in partnership with ANEV, the Italian Wind Energy Association, collaborates to develop the sector in Italy, in terms of content, training, information and design.

For more information about the Key Energy Expo Rimini 2019 please visit:

If you are interested in meeting us during the event please contact Mr. Maarten Deutekom:


Espositive Area: D7 189

Product category: Equipment, components and technologies for wind power plants , Network-linked mini wind plants, Offgrid mini wind power plants


Zero Emissions Day

21 September. Zero Emissions Day

Zero Emissions Day is inspired by the possibility that we can act collectively to give our world a day off when nothing is turned on. The rules are simple:

  1. Don’t use or burn oil or gas or coal.
  2. Minimize (or eliminate) your use of electricity generated by fossil fuels.
  3. Don’t put anyone in harm’s way: All essential and emergency services operate normally.
  4. Good luck, have fun and enjoy the day!

Join and participate to shrink the footprint, bank millions of barrels and divert millions of tonnes of GHG. Join also because Zero Emissions Day inspires you to come up with all sorts of ideas and ways to spend a day when the only thing that’s “turned on” is you and your community.


New trainee, Alec Koning!

Hi everyone,
I am Alec, a 19 year old boy from the local village. Currently, I am studying HBO, Entrepreneurship at University Inholland. I just started my third year and now I have to take part in a business for 6 months. I will become responsible for the social media channels and will play an important role in the sales and marketing activities. I hope my colleagues will enjoy my time at Wind Energy Solutions the same as I do.

Dorian 0,5

Hurricane Dorian causes catastrophe on the Bahamas

We wish strength to all people involved in the situation on the Bahamas. We remember times like these on Peter Island that also was affected by two category 5 hurricanes, two years ago in 2017. An engineer of WES was doing maintenance on Peter Island that helps the resort to reach their sustainable goals, while hurricanes Maria and Irma passed by. Times like these are difficult but we have to work hard to get over it and rebuilt our sustainable life.

Nowadays the Bahamas have to deal with one of the most powerful Atlantic  hurricanes in history. The category 5 hurricane Dorian already destroyed over 13.000 houses. This digit will rise in the upcoming days but luckily there are a lot of people evacuated . Once again, we want to support all the people in de surrounding areas. Stay strong together!


National Energy Globe Award Saint Helena 2019

WES National Winner of the Energy Globe Award Saint Helena, Ascension and Tristan da Cunha!

We are delighted to inform you that Wind Energy Solutions is the National Energy Globe Winner of Saint Helena, Ascension and Tristan da Cunha!
All national winners were announced in the framework of the World Environment Day on June 5, 2019. Our St. Helena project is now evaluated for the International Award of 2019 too.

The Project

The St. Helena project started in 1998 when three Lagerwey 18/80 turbines were installed on the island. In 2009 WES increased the number of turbines to a total of six by adding three WES80 80kW wind turbines. In 2014 another six turbines have doubled the wind capacity on the island of St. Helena to twelve wind turbines.

Initial situation

Power supply on islands is most of the time generated by diesel generators. WES wants to enter this market segment with its renewable energy generation plant and save fuel costs and co2 reduction for the end user or government.


The renewable energy generation plant (REGP) consists primarily out of a WES wind turbine and secondary out of a diesel generator. This means that the WES turbine also can be fit in in an existing diesel generator configuration. The WES passive pitch system and the smart control can regulate and stabilize the mini grid without extra controls.


The renewable energy generation plant (REGP) consists primarily out of a WES wind turbine and secondary out of a diesel generator. This means that the WES turbine also can be fit in in an existing diesel generator configuration. The WES passive pitch system and the smart control can regulate and stabilize the mini grid without extra controls. Since 1998 when the first three turbines were installed, the use of electricity on the island has doubled. With the addition of 6 turbines in 2014 the target is to reach a wind penetration level of 80% or more.

The Energy Globe Award

With more than 182 participating countries and over 2000 project submissions annually the  is today’s most prestigious environmental prize worldwide. It distinguishes projects regionally, nationally and globally that conserve resources such as energy or utilize renewable or emission-free sources. Award ceremonies are held all over the world. Prominent personalities as well as Energy Globe Ambassadors in 90 countries support the mission of Energy Globe. The activities of Energy Globe attract worldwide media attention – international TV stations report each year with approximately 1,000 hours of broadcasting time. The aim of the Energy Globe is to raise global attention on sustainable, everywhere applicable environmental solutions and to motivate people to also become active in this area.

2 blade 3 blade

How many blades are best for wind energy production?

The vast majority of wind turbines currently being installed have three blades. Why not four? Or two? Or a lot more to catch as much wind as possible?

The quick answer is that a two bladed wind turbine is already great for great efficiency. With two blades you need significantly less material, construction and maintenance costs. A third or fourth rotor blade makes the wind turbine marginally more efficient, while the construction and material costs increase considerably. The four blades of our historic wind mills were more of a practical choice.


The four blades of our historic wind mills were more of a practical choice.

Betz Law

Albert Betz formulated the law in 1919 that an ideal rotor can extract a maximum of 59% of the energy from the wind. If you get more energy out of the wind, the wind slows down further, that reduces the supply of wind to the turbine. An ideal rotor has endlessly infinitely narrow turbine blades, but according to a document that Siemens drew up in 2007 in which they deal with our question, it is stated that modern three-bladed wind turbines come to 80% of the Betz limit thanks to a smart blade design and a well-chosen rotation speed; a two-bladed turbine would achieve 5% less efficiency, but will have a higher return on investment because of the lower costs.

Two-bladed wind turbines offer a number of distinct advantages over three-bladed wind turbines.

The major advantage of having a reduced number of blades (and pitch drives) is the rotor weight (and therefore material) they approximately 30% less heavy than a comparable three-bladed rotor (Aerodyn engineering GmbH, 2014). Moreover, as two-bladed rotors operate at a higher rotational speed, the torque on the shaft is lower and more consequently the rotor and nacelle (which houses for instance the generator and drivetrain) are lighter. Another conveinience of a rotor with less than three blades is that they can be turned horizontally durig storm so they are less likely to be hit by lightning.

Two-bladed rotors are approximately 30% less heavy than a comparable three-bladed rotor

Another advantage can be found during transportation and construction: a two-bladed rotor can be transported fully preassembled and pretested on a ship’s deck to the wind farm site (De Vries, 2011). Finally, extreme loads can be considerably reduced by using horizontal parking of the rotor (Aerodyn engineering GmbH, 2014). Due to reduced extreme loads, the tower and foundation can be designed lighter.

Matter of taste

Roberto Delgado, principal engineer at 2-B Energy, it’s a matter of taste to choose between two or three bladed wind turbines. Some just prefer three-bladed models because they find them more aesthetic. Delgado wants to breathe new life into the two-bladed wind turbines. A two-bladed 6 MW 2-B Energy wind turbine has now been installed in Eemshaven for six years. Through individual pitch control (IPC), independently controlling the pitch of each turbine blade, this wind turbine can take away much of the dynamic load. Check out how our piching technique works

Storm resilience

A major disadvantage in areas with the most constant good wind is that they can turn into strong storms and hurricanes periodically. Most wind turbines cannot withstand the high wind speeds that these weather conditions entail. 2-bladed wind turbines can easily be brought down quickly with one crane intead of two cranes most thee-bladed turbines demand.

Our in-board-hoisting-crane can greatly reduce the maintenance costs of the two-bladed wind energy installations.

Our entire range of wind turbines can be equipped with an in-board-hoisting-crane which can be easily operated to secure the entire technical installation of the turbine without external crane within a few hours. In this way, no high costs have to be incurred for supplying and using any mobile crane installation.

A second advantage of this built-in elevator construction is that inspections on the rotor and major maintenance can also be carried out without equipment from external sources. In addition to the advantages of the installation compared to three-bladed wind turbines, this greatly reduces the maintenance costs of the two-bladed wind energy installations.

Check out our animation of the in-board-hoisting-crane in action.


Delgado foresees turbines of 10, 12 or more megawatts are going back to the two-bladed design. Dynamic load can always be better controlled with good steering. According to Delgado, a two-blade design for a wind turbine in the year 2019 has less than 3% lower efficiency than its three-leaf counterpart with the same diameter. You then get extra electricity from longer turbine blades, while you can still continue to benefit from lower construction, material and maintenance costs.

A number of companies have begun developing and building large two-bladed wind turbines (Schorbach and Dalhoff, 2012; Clover and Snieckus, 2014). This renewed interest in two-bladed wind turbines is mainly motivated by the increased focus on offshore wind energy. Cost of energy reduction of 10−12% is stated and in Clover and Snieckus (2014) a 20% reduction, on paper, is mentioned for two-bladed wind turbines. The potential cost of energy reduction makes that two-bladed turbines are an interesting opportunity which manufactures are actively exploring.


The sustainable and profitable path forward for owners of aging wind turbines

The wind energy sector is set for a development boom for the coming years. Nations around the world are gearing up for a substantial expansion in renewable energy to offset concerns over energy security and to meet strict environmental targets and timetables.

When it comes to wind power most of the focus is being put on offshore projects and the promise of larger than ever wind farms and turbines far out to sea. But operators and developers should not be so quick to downplay the potential of the onshore wind sector.

Too old some say, citing farms dating back to the 1980s. Not enough popular support to develop on new greenfield sites say others, and anyway all of the ‘windiest’ sites have already been taken haven’t they?
All true, and indeed given that a typical wind turbine has a product lifetime 20 years there are therefore increasing questions over the reliability and productivity of hundreds of existing onshore wind farms worldwide as developers and operators strive to meet ever more stringent quotas and demand.


All of the ‘windiest’ sites have already been taken haven’t they?


Onshore wind farms

Onshore wind farms can substantially contribute to the great new era of wind without the need for new site locations.

The options are retrofitting, essentially improving an existing turbines efficiency and capacity by fitting new technology such as better grid connections or the latest blade designs, and repowering, decommissioning an existing turbine and building a more modern and powerful version. The UK, Germany, Denmark, the Netherlands and the US are undertaking the majority of repowering and retrofitting projects at present. This is perhaps unsurprising given their ‘pioneering’ status in the wind industry and hence a greater number of aged wind farms than elsewhere.
Emerging wind markets such as China and India though hold significant long-term potential with India already seeing some repowering activity.

The likelihood of failure simply increases in older turbines.


Repowering vs retrofitting

The likelihood of failure simply increases in older turbines and therefore the repair costs rise in proportion. This enormously enhances the potential profitability of repowering or retrofitting the old technology. The only real question is which of both options to take? The first, i.e. replacing old wind turbines with new ones, has its drawbacks because acquisition prices are high and the replacement involves a number of administrative steps that can get to last longer, besides having to add the time of acquisition and installation of the wind turbine itself.

Replacing part or all of the turbines before the end of their lifetime with new more efficient and more powerful machines

Repowering can refer to a single wind turbine or to a whole wind farm replacing part or all of the turbines before the end of their lifetime with new more efficient and more powerful machines. It can also be used to rearrange the location of the turbines in order to better integrate them into the local planning of residential areas. It is seen as a better option than building a new site at a different less windy location as most of the ‘windiest’ sites have already been developed on.

The ability to re-use part of the infrastructures already developed on site such as roads and grid connection also means less capital investment than building from scratch. Planning permission should also be easier from an existing site.

Overall an operator’s O&M costs are reduced after repowering projects thanks to newer and more efficient technology and economies of scale.
Prohibitive factors against repowering included temporary loss of revenue until the completion of a project, deemed only particularly beneficial for small-size turbines, more expensive and too complex.



The second solution that owners or operators can choose is the overhaul of the turbine, which means to renew some electrical and mechanical components of existing turbines and update the wind turbine control system.

Fitting in new technology such as better grid connections or the latest blade designs.

The main benefits of retrofitting include reduction of future running costs due to the better reliability of the replaced parts and increased productivity. Indeed it is estimated that retrofitting can improve reliability and productivity by up to 30%.

The cost of a retrofitting option varies but in general, components that are suitable for retrofitting don’t cost more than the O&M specified components and take no longer to install. It also has little effect on a turbine’s insurance or certification.


How are turbines retrofitted?

The retrofitting process consists in integrating a frequency converter equipped with the latest technology in power electronics and the renewal of some mechanical and electrical components.

The integration of the converter allows the wind turbine operate at variable speed to adapt its speed to the wind conditions as do the new wind turbines following current standards. This allows them to work at the optimum operating point for maximum energy transfer between the wind and the blades and smooth operation of the mechanical drive.

In addition, the cost of retrofitting is significantly less than the equivalent of a new wind turbine and its installation time is reduced depending on the owner’s needs and the conditions existing prior to retrofit.

The cost of retrofitting is significantly less than the equivalent of a new wind turbine.


Political support

Some industry players want to see better financial incentives given to operators such as more generous feed-in-tariffs to make repowering projects more economic. However that isn’t proving easy in today’s financial climate. I heard one leading developer say: “There is a strong belief that in the next few years there will be an easier planning regime, but that isn’t visible at the moment. So in all permitting is a problem.”

Whatever option is taken continued political support is vital. The ability of repowering and retrofitting to boost the wind sector’s capacity and productivity, not only in developed countries but also emerging markets, will be mute if governments are cutting renewable subsidies.


Wind Energy Solutions

At WES we have developed a solution to modernize aging wind turbines so that they can be profitable again. Although new wind turbines occupy their own position in the wind energy mix, there is also a growing demand to revitalize assets of a certain age.
With the maturity of the market for onshore wind power, assets are aging and many turbines have already completed their lifetime period.

Repowering and retrofitting offer a sustainable and profitable path forward and the opportunity should be grasped by all.

View all our turbines and options


Do you want to know what the best solution is for your business?