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FAQs

Energy Systems & Connections

How can I sell electricity to the grid?

Every country has different policies and schemes regarding energy export and selling to the grid. Rules change from government to government, so we recommend you investigate your local country's requirements in detail.

As a general direction, it is possible and supported to sell surplus power generated from your wind turbines and solar panels to the national grid in many countries in the World. You should register under the relevant energy export scheme through your energy supplier in your country. After the registration, you'll get paid for every unit of electricity you feed back to the grid.

How do I make the system connections? What do I need?

System connections change depending on the type of energy system you would like to build: On-grid, on-grid hybrid, or off-grid systems. Please click here to check our example diagrams to understand the ideal connections per system.

Which cable should I use for my wind energy system connection?

There are multiple factors to be taken into consideration for cable selection.

The quality of the insulation affects the rating of the cable. PVC insulated cable with a temperature rating of 75°C is typically used and recommended. Cable insulated with butyl rubber has a higher temperature rating and can therefore carry higher currents.

Additionally, poorly made and corroded connections can introduce very high resistances into a circuit and are probably the most frequent cause of poor system performance.

Tinned cable is the best as this offers superior corrosion resistance to untinned copper wire, particularly in the marine environment.

When considering which cable size to use, we recommend you assess the total length of the cable run in meters. Please remember to include the height of any mounting tower or tube, then multiply this by two, which gives the total circuit length.

The section of the cables can be decided depending on the number of units in the system and their distance from each other.

For the best results, we recommend you get installation support from an electrical engineer or electrician who is an expert in this area.

How can I be sure that my wind turbine system is working well?

The first step to assess the performance of your wind turbine system is to check the power curve for that particular wind turbine (Wind speed versus electrical power generated). This curve shows how efficiently the turbine converts the wind energy into electricity.

The actual performance of your system will be affected by local wind conditions, nearby obstructions, power demand profiles, and a range of other factors, such as connections and the quality of the materials used. So power curve on its own might not match your exact power generation, but the values should be reasonably close if everything in the system works well.

I already have a solar system, but I want to integrate a TESUP Wind Turbine into it. How can I do it?

The best way to include TESUP Wind Turbine in your existing solar system is to create a full parallel connection consisting of the TESUP Wind Turbine and TESUP Charge Controller.

If your system is off-grid, the TESUP charge controller must be connected to your battery. If your system is on-grid, the charge controller must be connected to a separate inverter that will be directly connected to the grid.

You can also connect the solar panel and the TESUP Wind Turbine to the same hybrid inverter with two separate entries. But our recommendation is to use a separate inverter for TESUP Wind Turbine to ensure the system's operation and continuous energy generation in case of any failure in your solar system.

Please click here to learn about system connections and check our example diagrams.

Can I combine solar and wind energy products and create a hybrid system?

Yes, you can. Please check our connection diagram for hybrid systems to learn about its details. Click here.

How far should the wind turbine, charge controller, and inverter be positioned from each other?

It depends on the location and the height you plan to install your wind turbine. The higher the wind turbine is, the better to catch the wind. Naturally, there will be a certain distance from the wind turbine to the charge controller as one will be at the top of a roof, tower, or pole; and the other will be on the ground level. But the charge controller should be positioned as close to the wind turbine's horizontal projection line as possible but in a protected location. The charge controller and inverter should be located next to each other or very close to each other to avoid excess cable usage and reduction in energy transmission.

How can I calculate the yearly power generation amount for specific TESUP products?

In real life, there will be multiple factors affecting the power generation of your wind turbine such as its height, connection quality, cables used, and the efficiency of other system components. But in order to make an estimated calculation for the ideal conditions, you can check the power curve of the TESUP Wind Turbine. You should take a few things into consideration for the estimated yearly power generation. These are the average wind speed for the selected location, hours of wind per day, wind turbine's power generation capacity at the location's wind speed, number of days that the wind turbine is expected to operate, and any additional factors that might affect the efficiency of the system and can be used as a multiplier.

You can also check our saving calculator to calculate your estimated yearly savings per TESUP product. You can find TESUP Saving Calculator at the bottom of this page.

Wind Turbines

What are the differences between horizontal and vertical wind turbines?

The most significant differences between horizontal- and vertical-axis wind turbines are as follows:

1. A horizontal-axis wind turbine has its axis of rotation parallel to the wind stream, whereas a vertical-axis wind turbine has its axis of rotation perpendicular to the wind stream.

2. Horizontal-axis wind turbines usually use three blades, whereas vertical-axis wind turbine configurations, blade shapes and the number of blades vary a lot.

3. Horizontal-axis wind turbines pivot facing the direction of the wind. Whereas vertical-axis wind turbines are omnidirectional, they do not change orientation to match the wind direction.

Which one is a better option, horizontal or vertical wind turbine?

Both turbine designs have their advantages.

Vertical-axis wind turbines are more indicated when it comes to residential applications. They are easier to install and require less space. They don't have to be facing the right wind direction either. In a vertical system, air flowing from any direction can rotate the blades. They also handle turbulent winds better than horizontal wind turbines.

Horizontal-axis wind turbines have higher efficiency ratings and are more likely to operate at higher wind speeds. They are better at converting wind energy into useful mechanical motion because their blades are perpendicular to wind direction, so energy can be generated the entire way through the rotation.

You can make your decision depending on where you plan to install your wind turbine, how much space you have and how much energy you plan to generate.

WHAT ARE THE DIFFERENCES BETWEEN V7 Low Wind AND V7 High Wind MODELS? WHICH PERFORMS BETTER?

Both models are very robust, compact, and durable yet lightweight.

V7 Low Wind can generate up to 7 kWh of electricity per hour. Its rotation starts at 4 m/s wind speed. Rotation and power generation start at even 3 m/s wind speed. It starts rotating at a lower wind speed as a result of its larger blades. It's larger in size and occupies more space.

V7 High Wind can generate up to 7 kWh of electricity per hour. Its rotation starts at 5 m/s wind speed. Rotation and power generation start at even 4 m/s wind speed. It is more compact than V7 Low Wind.

Can I connect my TESUP Wind Turbine to a battery?

Yes, you should connect your TESUP Wind Turbine to TESUP Charge Controller first, then link TESUP Charge Controller to your battery. TESUP Charge Controller is required to convert AC (Alternative Current) to DC (Direct Current) and control battery charging.

Is it possible to connect multiple wind turbines in one system? If YES, how?

Yes, it is possible to connect multiple wind turbines in one system. We recommend a parallel connection of every TESUP Wind Turbine to your home electricity board. Every TESUP Wind Turbine should be connected to a separate TESUP Charge Controller which should be connected to a separate TESUP Inverter. Then different TESUP Inverters should be connected to your home electricity board. This is our recommendation and the safest method to make sure that every wind turbine can operate independently from each other and that the system can continue to generate energy in case of a product-specific problem.

Can I install my TESUP Wind Turbine at the seaside?

Yes, you can install TESUP Wind Turbines at the seaside locations. But the lifetime of your product might be a bit shortened due to salty water and its diffusion into the air at the seaside.

How noisy are TESUP Wind Turbines? What are the noise level measurements?

All of our wind turbines are very quiet, producing only up to 35 dB, which is less than half the sound of a vacuum cleaner. Noise levels of our products are regularly checked and tested in ideal outdoor environments for wind turbine installation.

Are all TESUP Wind Turbines tested? How can I know if my turbine is tested or not?

Every TESUP Wind Turbine is tested before its packaging process at our factory. A video recording happens during every product's test process that shows product's serial number in a visible way. These test videos are shared with the customers just after the product delivery.

Can I use my solar panel and wind turbine together in the same energy system?

Yes, you can. The systems combining solar panels and wind turbines are called Hybrid Systems. Different connections and components are required for the off-grid and on-grid systems.

For the off-grid solution: The wind turbine is connected to the wind turbine charge controller that is connected to the battery. The solar panel is connected to the solar charge controller that is connected to the same battery. The battery is connected to the battery inverter that is connected to home loads or electric vehicles for electricity consumption.

For the on-grid solution: We recommend a full parallel connection of wind turbine and solar panel unless you have a very good quality 2 MPPT inverter. The wind turbine is connected to the wind turbine charge controller which is connected to a grid inverter. The solar panel is connected to a different grid inverter to ensure maximum efficiency of the entire system. Both grid inverters are connected to the home separately for electricity usage. They're also connected to the grid via the metering device and retailer meter to feed the extra electricity back into the electrical grid network.

Click here to see the detailed off-grid and on-grid system diagrams.

There is a vibration when my TESUP Wind Turbine rotates. Why?

All screws, bolts, and mounting parts of the turbine system must be mounted correctly and securely during the installation. Additionally, the mounting base of the turbine must be fixed to the mounting surface properly and checked that it is fully stable. Otherwise, vibration may occur.

Please check the screws and bolts on your wind turbine system at least every 6 months to make sure they are properly fastened.

What are the recommended minimum and maximum heights to install a TESUP Wind Turbine?

Minimum and maximum height requirements change from country to country. But as a general direction, the distance between ground level and the lowest part of any wind turbine blade should not be less than three meters. And the highest part of the stand-alone wind turbine shouldn't exceed 11 meters. These are the average limits to follow in most countries. We highly recommend you check the specific requirements in your country.

The placement of your vertical and horizontal wind turbines can have a large effect on how much power they generate. We recommend you place your TESUP Wind Turbine as high as possible, ideally on the roof of a building or on a standalone pole. Wind speed is the lowest on the ground level so making sure that the turbine is as high up as possible will maximize the rotation speed and power generation. A horizontal wind turbine should not be placed behind obstacles (like buildings or trees). If there is an obstacle, the turbine can be placed on a pole to ensure its level is much higher than the obstacle.

How can I reach maximum efficiency with my wind turbine?

The amount of power that can be extracted from the wind depends on the speed of the wind and the size of the turbine blades. No wind turbine is 100% efficient (even when running at its optimum wind speed). There is friction between all the moving parts, and some power is lost at the gears or different connection parts of the system, and this is normal. You can use TESUP Power Curve Chart included in the user manual in order to calculate the true output for the average wind speeds on your site. This allows you to see the estimated power output at your local wind speed.

In order to make the system operational and reach the estimated power output, TESUP Wind Turbine, TESUP Charge Controller, and TESUP selling grid inverter are all required. Additionally, you must make sure that your turbine system is installed by a professional electrician, fixed securely to the mounting surface, and adjusted according to the wind direction.

Why is the voltage of my wind turbine low?

There are many reasons why the turbine may be demonstrating lower outputs than anticipated. These reasons can stem from turbulence and erroneous measurements through battery type and condition. Turbulence is the most common reason why turbines do not perform to their specification. Cable size may also affect the output. Ensure that the correct minimum and maximum cable sizes are installed. Different battery technologies, battery age, and conditions will also affect the rate at which the batteries can absorb power. Last but not least, measurement errors may occur easily while measuring the wind and power output of the turbine. Ensure that high-quality shunts are employed for accurate current readings.

I can't get current from my wind turbine. Why?

The turbine may be running in an off-load state, meaning that the circuit from the turbine to the batteries is incomplete. In this situation, the turbine is free spinning and may generate higher voltages than anticipated from the turbine output cables. Check that all of the connections from the turbine through the run/stop switch and the batteries are correct. If a fuse or circuit breaker has been fitted to the turbine, ensure that this is correctly closing the circuit. Never leave the turbine running in an off-load state, as it may cause damage to the turbine during high winds.

Something is stopping my wind turbine; it was working well before. What might be the problem?

There are a few reasons that might cause this issue:

1. If the wind turbine is connected to a battery, the charge controller stops the wind turbine once the battery is full to the adjusted maximum charging voltage level.

2. If two or more cables are touching each other we call it short-circuit. The short-circuit can stop the electricity flow and this might be a reason. Please control all cables and be sure they are not touching each other.

3. There are some cheap hybrid battery inverters in the market. There are battery inverters and solar charge controllers combined but these cheap hybrid charger inverters are acting as solar charge controllers at first. These devices can stop the wind turbines via the battery.

4. Limit voltage adjustment with the potentiometer may be wrong. If the led lights up, it means it is braking. If the potentiometer is set incorrectly, the turbine will brake in order not to exceed the determined voltage.

5. The switch on Charge Controller can be in position 1.

6. Our system is integrated into the end consumption point. The TESUP Charge Controller converts produced energy to heat in dangerous situations(dump-load system). But, the fuse connection prevents this. That's why customers shouldn't use a fuse connection between the wind turbine-charge controller-inverter connection.

I think my wind turbine is not rotating freely. What could be the reason?

TESUP wind turbines have permanent magnet generators having strong N42 neodymium magnets with steel slots inside. These wind turbines are designed for maximum power performance. When the wind speed is over 4m/s, the turbine rotates freely by exceeding this holding torque (cogging torque).

I HAVE A V7 Low Wind  WIND TURBINE WHICH IS CONNECTED TO AN INVERTER. THE SYSTEM IS ONGRID AND WORKING WELL, BUT HOW CAN I IMPROVE ITS EFFICIENCY?

The V7 Low Wind wind turbine is a vertical wind turbine. It can start its rotation at 5m/s wind speed. Once it starts rotating, it can generate power even at 4m/s wind speed. On the other hand, every inverter has a different minimum DC startup input voltage, it varies from 50V to 80V for TESUP Inverters. If your wind speed is not high enough to generate the required voltage, the inverter will not start operating and won't transfer your wind turbine’s power to the electricity grid.

Are there any precautions I should take in very windy weather?

Our wind turbines are very robust and durable. They operate safely in normal windy conditions. If a hurricane scale III (50–58 m/s) or above occurs, please cover wind turbine blades. If you live in a very windy location, we recommend you have a suitable cover (or an item to be used as a cover) in hand to be ready for emergencies.

What are the weights of TESUP Wind Turbines?

TESUP V7 with High Wind Blades is 36.5 kg / 80 lbs.

TESUP V7 with Moderate Wind Blades is 34 kg / 75 lbs.

TESUP V7 with Low Wind Blades is 36.5 kg / 80 lbs.

TESUP H7 is 40 kg / 88 lbs.

Are connection cables included in TESUP Wind Turbine packages?

No, connection cables are not included because the cable size and quantity depend on the location of your wind turbine and its distance to the other components of your energy system.

WHAT ARE THE DIFFERENCES AMONG THE V7 Moderate Wind  AND THE V7 Low Wind AND THE V7 High Wind?

TESUP  V7 Moderate Wind  is our most efficient and sleek vertical wind turbine with the lowest starting wind speed and the highest power generation capacity.

The key differences among V7 Moderate Wind and V7 High Wind and V7 Low Wind are the following:

1. Lowest Starting Wind Speed

Like V7 Low Wind,  V7 Moderate Wind has the lowest starting wind speed. Its rotation starts at 4 m/s wind speed. Upon rotation, power is generated at even 3 m/s wind speed.

2. More Rapid Acceleration

After rotation starts,  V7 Moderate Wind accelerates more rapidly versus other TESUP Wind Turbines under the same wind speeds.

3. New innovative design:

 V7 Moderate Wind is TESUP's most innovative, compact, and premium vertical wind turbine design.

4. Less Environmental Impact & Quicker Installation

V7 Moderate Wind has a new 2-blade shape that is produced by using less material. As a result, it is lighter, more compact, and has less environmental impact than other TESUP vertical wind turbine models. Since it has fewer blades, its installation process is shorter and takes only 15 minutes.

5. New Enhanced Body Design

V7 Moderate Wind's new body base allows easier fixing to the surface, provides better protection, and creates a cleaner look.

Solar Panels

What are the advantages of flexible solar panels?

TESUP Flexible Solar Panels have many advantages compared to traditional solar panels. They come with more mounting options and their flexible design can easily fit the shape of any surface without any additional equipment. They can be easily installed on building walls, curved roofs, boats, caravans, and motorhomes. They are lightweight and better suited to roofs that can't take much weight. Their smaller size makes them convenient; they are easy to use in a variety of environments and easy to move from one place to another. Unlike full-sized solar panels, you can carry TESUP Flexible Solar Panels on-the-go, and store them easily.

How can I fix the solar panels to a surface? Double-sided tape doesn't seem to be strong enough.

TESUP Flexible Solar Panels can be installed and fixed on the selected surface via gluing, double-sided adhesive tape, screwing, or riveting. If adhesive tape or gluing is used, you must ensure that the selected adhesive tape or glue is suitable for outdoor applications with a wide temperature range and UV protection. The surface must be very clean and dry to ensure strong attachment.

The double-sided adhesive tape makes a strong immediate bond with the support material and does not allow repositioning. You must not try to move the panel after the adhesive tape application, even if it is only partially attached. Otherwise, you may seriously damage the solar cells. If you prefer gluing, you must leave it for at least 24 hours at normal room temperature after the application to achieve full adhesive strength. If you plan to install your solar panel in a vertical direction that requires high holding power, screwing would be a safer and stronger option for installation.

For more details, please check TESUP Flexible Solar Panel User Manual.

Do flexible solar panels lose efficiency over time?

Flexible solar panels are typically about 5-10% less efficient than rigid panels, but have a wider variety of applications due to their flexibility and thin size. But the reduction in performance over time is not higher or faster than rigid panels. Generally, all solar modules can be expected to degrade by 0.5% to 2.5% a year.

Can TESUP Flexible Solar Panels be used as part of a wind-solar hybrid system?

Yes, they can be used as part of wind-solar hybrid systems. We recommend a full parallel connection of wind turbines and solar panels to maximize energy generation and avoid system breakdowns in case of an emergency in one part of the hybrid system. A full parallel connection means using a specific charge controller and a specific inverter per energy generation unit. For more details about wind-solar hybrid systems and their connection details, please check our example connection diagrams.

Charge Controllers

Can I use my wind turbine without a charge controller?

No, you can't use your TESUP Wind Turbine without a TESUP Charge Controller. It is an essential part of the TESUP Wind Turbine System. It controls the wind turbine and acts as a manual emergency brake to protect your wind turbine in the case of an emergency. It is also required to convert AC (Alternating Current) to DC (Direct Current) and control the battery and inverter to prevent overcharging.

How many wind turbines can be connected to the TESUP Charge Controller?

You can connect 1 TESUP Wind Turbine to each TESUP Charge Controller.

What is the manual switch (emergency brake) on the charge controller used for, and in what position should it be?

The switch on the charge controller is a manual braking switch to stop the wind turbine in case of an emergency. In stormy weather, it's better to activate manual braking by turning this switch to the "1" position to protect the system. Under normal weather conditions, the switch button must be kept at the "0" position to continue producing energy.

Inverters

Can I learn TESUP inverters' startup voltage?

Our Inverters' startup voltage mostly varies from 50V to 80V depending on their model and they keep operation above 50V. For detailed information about our inverter models, please click here.

Which inverter is the best for wind turbine connections?

We recommend parallel connection of each wind turbine to a separate inverter. In this way, any operational problems on one wind turbine won't affect the others and the system will continue to generate energy.

Can I use a hybrid solar inverter with my TESUP Wind Turbine?

We don't recommend you connect a TESUP Wind Turbine to a hybrid solar inverter. Parallel connection of every energy generation unit with a separate inverter will maximize the energy generation and avoid big system breakdowns in the case of an emergency or system failure.

Technically, it is possible to connect TESUP Wind Turbine to a hybrid solar inverter if it has two different entries for both wind and solar products, but we don't recommend it to avoid any potential damage caused by this hybrid connection. Any damage to TESUP Wind Turbines occurring due to a hybrid inverter connection is not under TESUP Warranty.

Does TESUP Inverter support the hybrid system? Do I need a separate inverter for the solar panels?

We recommend separate inverters for TESUP Wind Turbines and TESUP Solar Panels. TESUP inverters have 1 MPP tracker and allow a single energy generation unit connection. Every additional wind or solar energy generation unit requires a separate inverter.

Delivery & Tracking

What is the average lead time to receive TESUP products?

Our standard delivery is 5 working days (stock permitting) and free for Greece orders over €500. During peak times, delivery may extend to 3 weeks, but we’ll keep you updated on the status. Your satisfaction is our priority.

How can I track my order's delivery status?

Once your delivery box is shipped, you'll be notified by our couriers (DHL or UPS).If you don't receive a notification within 5 days of your order, you can always contact our customer care team by filling in a ticket on our customer experience page.

If my delivery box is damaged, what should I do?

We work with the best international shipping companies to ensure that your products are delivered safely and on time.Our products are shipped in very robust and durable wooden boxes, and they're immobilized by filling the empty spaces in the delivery box with a special foam machine. Additionally, our courier guarantees a doorstep delivery. All these precautions are taken to ensure that you receive your TESUP products in the best condition and without any damage.Despite all these precautions, if your delivery box is damaged, please contact our after-sales experts immediately by filling in a ticket on the customer experience page. They will analyze the situation and do their best to support you.

Warranty

Do TESUP products have a warranty?

Yes, all TESUP products come with a standard 2-years TESUP Care Product Warranty. Customers can also extend TESUP Care Product Warranty by paying extra for selected TESUP products.

What is covered in TESUP Care Product Warranty?

Any failure occurring due to a defect in the original product despite its intended use is under TESUP Care Product Warranty, and our after-sales support team will be responsible for solving your problem. Any product or system failure occurring due to customer misuse is not covered under TESUP Care Product Warranty. You can read potential misuse situations in specific product user manuals. Each TESUP product features custom-built software personalised with the customer's name. Please be aware that once an order is placed and processed, modifications to the software remotely are not possible, and consequently, we do not offer refunds. 


For products under warranty experiencing manufacturing defects or malfunctions, customers must send them to our London repair centre for examination. While shipping costs for returns are the customer's responsibility, if the fault is attributed to the production process, these costs will be reimbursed. In such cases, a new replacement product with free delivery will be promptly sent.


To learn more, please visit our  Terms & Conditions page.

Can I extend my TESUP Warranty?

Do you offer such an option?Yes, we extend TESUP Care Product Warranty for selected TESUP products. Please contact our after-sales support team to get more information about this service. You can do it by filling in a ticket or booking a product service appointment on our customer experience page.

If I face any problem, how can I reach you?

Do you have any call center or support? Yes, we have an amazing customer experience team, and they provide each TESUP customer with the right customized service. Please visit our Support Page and login to find out more about how to get in contact with our experts.

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