Questions about the TWT-11

The TWT-11 is a 5 kW small wind turbine for rural homes and farms. A tension-line structure, a slim tower held by guy lines to five ground anchors, carries the loads. That keeps the whole turbine at about 326 kg and removes the need for a concrete foundation.

Each blade is 5.5 m long. The tip height is 21 m for the Danish version and 15 m for the German version.

Most small turbines put a short rotor on a heavy, self-supporting tower. The TWT-11 does the opposite: long 5.5 m blades on a light, guyed tower. Per kWh it produces, it is up to 13 times lighter than comparable small turbines.

The large swept area also lets it start producing at 3.5 m/s. Light-wind hours are when small rotors stand still, and they are often the hours when electricity is most expensive.

About 15,000 kWh a year at a typical site, and up to 22,000 kWh at windy sites. How much your turbine produces depends on the wind at your address.

The feasibility study gives a model-based yearly estimate for your site before you commit to anything.

It starts producing at 3.5 m/s and keeps producing up to 18 m/s. Pitch-controlled blades regulate the power in strong wind, and the rotor turns itself into the wind without a motor (passive yaw).

Above 18 m/s the turbine stops producing. The TWT-11 is designed to survive wind speeds of up to 42 m/s.

The TWT-11 holds a full IEC 61400-2 prototype certificate. IEC 61400-2 is the international standard for the design and safety of small wind turbines.

The type certification campaign (IEC 61400-22, class 4) is in progress.

Height limits in parts of northern Germany are stricter than in Denmark. To make approval straightforward there, the German version has a 9.5 m hub height and a 15 m tip height. The Danish version has a 21 m tip height.

Unfortunately not. Permits for turbines of this size are very rarely granted in towns, residential areas or holiday-home areas. We therefore only accept reservations for addresses in rural zones: landzone in Denmark, Außenbereich in Germany.

In Denmark you can check your zone at kort.plandata.dk.

KiteX does. We handle the contact with the authorities for the installation permit, register the turbine with the relevant agency and your grid company, and pay the associated fees.

We do need information about your property along the way, so expect a few questions from us.

In landzone a small wind turbine needs a landzone permit from the municipality under §35 of the Planning Act (planloven). The Danish TWT-11 has a 21 m tip height, which is below the 25 m limit for the simplified process for small turbines.

The turbine must stand within 25 m of an existing building on your property. KiteX prepares and submits the application.

As a rule of thumb, we plan for at least 4 times the total height to the nearest neighbour's home. That is about 84 m in Denmark; in Germany we plan with at least 100 m. These are our planning rules, not legal minimums.

The distance also sets the noise and shadow levels at your neighbour's home, which we calculate for your site in the feasibility study.

In the open, with a clear view towards the west and south-west, where most of the wind comes from. We recommend a clear circle of about 30 m diameter around the turbine, and buildings, hedges and trees within 50 m should ideally be lower than about 7.5 m.

In Denmark the turbine must also stand within 25 m of an existing building on your property. A 25 m cable to the inverter is included and can be extended to 150 m. The feasibility study helps you find the best spot.

Two different areas matter.

• Footprint for site design: four ground screws in a cross, 7.5 m from the tower on the Danish version and 5 m on the German version, plus one at the tower base. The tower tilts down for installation and service along the line of one ground screw, so that direction needs a clear lay-down strip of the tip height plus about 2 m, about 11 m wide for the rotor. That is about 23 m for the Danish version and 17 m for the German version, or roughly 31 × 15 m and 22 × 11 m in total.
• Clear zone for wind flow: for the best aerodynamic performance we recommend a clear circle of about 30 m diameter around the turbine, without buildings or trees that disturb the wind.

The feasibility study places the turbine, the lay-down direction and the clear zone on your site.

The more open the site, the better. A yearly mean wind speed of 5 m/s or more at hub height makes a good site; between 4 and 5 m/s the estimate needs a closer look.

Open farmland usually does well. Sites sheltered by forest, buildings or hills usually do not. The feasibility study checks your site.

Protected areas, such as Natura 2000 sites or a German Naturschutzgebiet, trigger an extra environmental assessment that adds months to the approval. It is not always a no, but we look at these sites case by case.

Our current estimates:

• Sound power level: 83 dB(A) in normal operation and 79 dB(A) in silent mode
• Sound pressure: about 53 dB(A) at the tower and 47 dB(A) at 25 m

Sound drops quickly with distance. These are estimates until our measurement campaign is complete, and we will publish the measured values.

In Denmark the wind turbine order (Vindmøllebekendtgørelsen) sets 44 dB(A) at neighbouring homes in open country and 39 dB(A) in residential areas, at a wind speed of 8 m/s.

In Germany the Technical Instructions on Noise Protection (TA Lärm) apply. For purely residential areas the limits are 50 dB(A) by day and 35 dB(A) at night.

We calculate the level at your neighbour's home in the feasibility study.

Shadow flicker is the moving shadow of the blades when the sun is low behind the rotor. The German guideline allows at most 30 hours a year in the theoretical worst case and 8 hours of actual flicker. Denmark has no national limit, but planning practice follows the same guideline.

Whether it reaches a neighbour depends on distance and direction. We calculate it for your site in the feasibility study.

Collisions with wind turbines do happen, but far more birds die each year from glass buildings, power lines and cats. Our explainer goes through the numbers.

It depends on how much of the power you use yourself. Every kWh you use on site saves the full consumer price, including tariffs, tax and value-added tax (VAT). Every kWh you export is sold at the market price, which is lower.

The budget example on the TWT-11 page lets you set your own consumption for a Danish or German site.

It depends on how much electricity you use and when. As a guide:

• 15,000 kWh a year or more: about 60% of the production is used on site
• More than 20,000 kWh a year: about 80%

The rest goes to the grid. A heat pump, an electric car or other large loads raise your own use. Set your own yearly consumption in the example on the TWT-11 page to see the split.

Yes. Depending on your installation, we either connect the standard inverter alongside it or upgrade to a larger inverter that serves both your existing system and the TWT-11. We settle this in the installation design phase.

The two also complement each other: solar produces most in summer, wind most in winter.

Because they produce at different times. More than half of a TWT-11's yearly energy arrives from October to March, when solar panels produce the least and household consumption is at its highest. Wind covers the gap that extra solar panels cannot.

That depends on your wind, your consumption and electricity prices. The budget example on the TWT-11 page shows the payback year and the 20-year result for an example site, including service costs. Adjust it to your own consumption for a first estimate; the feasibility study then gives one for your site.

2027 production is sold out. We are now taking the 2028 waitlist. We contact reservations in order as soon as your area opens, run the feasibility study for your site and agree a delivery window with you.

In Germany we start in Schleswig-Holstein and Lower Saxony.

First deliveries are planned for spring 2027, and all 2027 installations are reserved by pre-orders. We contact pre-order customers in the order the pre-orders were placed, run the feasibility study for your site and agree an installation window with you.

Your deposit remains fully refundable until installation.

The list price is 165,000 DKK in Denmark and 21,100 EUR in Germany, including installation and VAT. The German price is the Danish price converted to euros, with 19 % German VAT instead of 25 % Danish VAT. Permits, the inverter, 25 m of cable and the first-year check are also included. There are no hidden extras.

New reservations on the 2028 waitlist are at the list price.

• Feasibility study and production estimate for your site
• Permit application and fees
• Installation design, including a 6 kW three-phase inverter and 25 m of cable
• Installation, erection and testing on site
• Grid connection set up and tested by KiteX
• First-year check and service

Reserving a place is free and needs no deposit. We confirm your place, send you an indicative production estimate for your site and contact you when your area opens.

Waitlist reservations are free and can be cancelled at any time. Existing pre-order deposits remain fully refundable: contact us and we refund the entire deposit to the account of your choice.

If your municipality refuses the permit, you also get the full deposit back.

KiteX is raising a growth round to scale production. The investor page has the background, the white paper and how to get in touch.

Five steps, all handled by KiteX:

• Feasibility study: a production estimate for your site and help choosing the spot
• Permits: we apply to the municipality at no extra cost
• Installation design: a setup adapted to your site and existing installation
• Installation: we install, erect and test the turbine
• Connection: we set up and test the grid connection and monitoring

No. The TWT-11 stands on five ground screws, placed 7.5 m from the tower on the Danish version and 5 m on the German version. There is no concrete to cast and far less digging than for a conventional turbine.

A three-phase 400 V supply at the property. The turbine connects to the inverter with a 1000 V direct current (DC) cable; 25 m is included and it can be extended to 150 m. KiteX contacts your grid company and sets up and tests the connection.

The standard inverter is a 6 kW three-phase grid-tie inverter. In the installation design phase it can be upgraded to a hybrid inverter that works with a battery and supports island (off-grid) operation. Tell us early if this matters to you.

Yes. The turbine is monitored around the clock, and KiteX can diagnose it remotely. A KiteX app for status, service requests and messages is planned; the exact features and launch date are not final yet.

A service visit every other year, with a larger service around year 10. The first-year check is included in the price. The budget example on the TWT-11 page includes an estimate of the service costs.

Three years on the turbine and eight years on the major structural parts. The warranty requires that the service schedule is followed. The final terms are part of your contract.