When choosing the right small wind turbine, you need to consider several factors to ensure it can meet your needs and operate effectively. The selection of small wind turbines (SWTs) demands a rigorous technical evaluation process to balance energy output, site-specific conditions, and long-term reliability. As decentralized energy systems gain prominence in both rural electrification and urban microgrid applications, understanding the engineering principles behind SWT selection becomes critical. This guide synthesizes IEC 61400-2 certification requirements, aerodynamic performance modeling, and field-tested quality control protocols to provide a systematic framework for optimal turbine deployment. Recent studies indicate that improper SWT selection accounts for 34% of underperforming installations (Global Wind Energy Council, 2023), underscoring the importance of methodical decision-making.
Here are some key purchasing suggestions:
Power demand
First determine your power consumption and power consumption time in order to choose a wind turbine with the appropriate power. The rated power of small wind turbines is usually between 500W and 10kW.
Installation environment:
Consider the abundance of wind resources, wind speed stability, and space limitations of the installation location. Generally speaking, small wind turbines can start generating electricity when the wind speed is above 3-5 m/s.
Wind rotor diameter：The larger the wind rotor diameter, the larger the area for capturing wind energy, and the corresponding increase in power generation. Select the appropriate wind rotor diameter according to the wind speed conditions of the installation environment.
Cut-in wind speed：The cut-in wind speed refers to the lowest wind speed at which the wind turbine starts to generate electricity, and the cut-out wind speed refers to the highest wind speed at which the wind turbine stops generating electricity. These two parameters determine the effective working range of the wind turbine.
Power generation efficiency：
Power generation efficiency is an important indicator for evaluating the performance of wind turbines, usually between 20%-30%. Choosing products with higher power generation efficiency can improve energy utilization efficiency.
When the wind speed reaches 12m/s, the wind turbine will reach the rated power. When the wind speed is too high, the wind turbine controller will start to work, and the resistance of the loader of the wind turbine controller will increase, making the wind turbine unable to continue working.However, a wind turbine with a false rating cannot reach this level, so we need to have a good understanding of the windward area parameters of the wind turbine.
However, it is not ruled out that some suppliers in the market will falsely mark more than 10 times, so it is necessary to combine the wind rotor diameter and the OEM power to identify the true power of the wind turbine.
As a manufacturer of wind turbines, we usually conduct quality control in the following four aspects.
Blade material: It is preferred to use high-strength nylon composite blades, which have high strength, good toughness, UV resistance, corrosion resistance and strong wind resistance.
Bearings and magnets: It is best to use imported or domestic first-line brands for bearings, such as Japanese NSK bearings and domestic Ha shafts, to ensure high working efficiency, wear resistance and durability. Magnets are recommended to use rare earth neodymium iron boron permanent magnets to improve efficiency and reduce deadweight.
Strong wind protection design: Wind turbines with tail rudder pre-bias design can automatically and accurately align with the windward direction, increase output power and take into account strong wind protection.
Carbon brush and brush ring structure: This device can effectively solve the problem of cable being twisted off and improve the safety and stability of use.
In summary, when choosing a wind turbine, please tell our sales engineer your daily electricity demand, whether you need to sell electricity, whether you need battery storage, the maximum power load, the local average wind speed, and specific installation location photos. With the above information, our sales engineer will communicate with the technical department to provide the most suitable wind turbine system for customers.
We can estimate the payback period of the solution for you based on the local electricity price and installation cost, and after the order is prepaid, we will issue an electrical connection diagram of the equipment to ensure a smooth installation for the customer.
