Generator efficiency is not a factor that directly affects the performance of a wind turbine. It is related to the efficiency of the generator used to convert mechanical energy into electrical energy.

The Betz limit is the maximum theoretical efficiency that a wind turbine can achieve, and it is approximately 59.3%.

The formula for calculating the power output of a wind turbine is $P = 0.5 * \rho * A * V^3 * C_p$, where $P$ is the power output, $\rho$ is the air density, $A$ is the area swept by the turbine blades, $V$ is the wind speed, and $C_p$ is the power coefficient.

The primary purpose of a wind turbine gearbox is to increase the rotational speed of the wind turbine blades, which is necessary to generate electricity efficiently.

Reducing the weight of the wind turbine is not a direct method for improving its efficiency. While a lighter wind turbine may require less energy to operate, it may also be less stable and more susceptible to damage.

The capacity factor is the ratio of the actual power output of a wind turbine to its rated power output, and it is a measure of the wind turbine's performance over a period of time.

Wind speed is a factor that affects the power output of a wind turbine, but it does not directly affect its efficiency. Efficiency is a measure of how well the wind turbine converts the kinetic energy of the wind into electrical energy.

The typical range of efficiency for modern wind turbines is 40-50%, meaning that they convert 40-50% of the kinetic energy in the wind into electrical energy.

The yaw angle is the angle between the wind direction and the axis of rotation of a wind turbine. It is important to keep the yaw angle small to maximize the power output of the wind turbine.

The pitch angle is the angle between the wind turbine blade and the plane of rotation. It is used to control the power output of the wind turbine and to protect it from damage in high winds.

The tip speed ratio is the ratio of the tip speed of a wind turbine blade to the wind speed. It is an important factor in determining the efficiency of the wind turbine.

The generator is the device that converts mechanical energy from the wind turbine into electrical energy.

The inverter is the device that converts direct current (DC) electricity from the wind turbine generator into alternating current (AC) electricity.

The transformer is the device that increases the voltage of the electricity generated by the wind turbine.

The battery is the device that stores electrical energy generated by the wind turbine.