In contrast to solar energy, wind energy is not distributed evenly. There is more wind on mountain peaks and in coastal regions than inland.
Small wind turbines are recommended where there is a constant draft of sufficient strength. If this is confirmed by a meteorological office with measured values - all the better. If the sun is shining there, it can also be used. The energy obtained from this is usually stored in batteries. There are no special requirements for the energy storage system. Usual battery voltages are 5V, 12V, 24V or 48 volts.
Online computers help to estimate the "yield".
A good installation site should meet two basic requirements: a high average wind speed and little turbulence (air turbulence). A solid mechanical fastening is important - after all, the system should also be able to withstand a storm.
The higher the average wind speed, the higher the output power and thus the charging current of the wind turbine. To simplify matters, it can be said that the higher the mounting height, the higher the energy yield. The higher the wind turbine protrudes over the surrounding buildings and / or vegetation, the easier it is to avoid turbulence. This makes the air flow more even.
A charge controller is used together with the wind turbine, which in many cases is supplied or is already integrated.
Unfortunately, many offers with high performance data are blinded, which are at best achieved in high winds. There is usually no diagram that can be used to estimate whether sufficient charging current is available at moderate wind speeds.
The wind turbine shown in the picture is a design project / prototype by Nils Ferber.