In one aspect, a method for the determination of a nacelle-inclination is provided. A first difference-signal is formed from the difference of a measured nacelle acceleration and an offset-value from a calibration. A second difference-signal is formed from a difference of the first difference-signal and a feedback signal. A first sum-signal is formed from adding an integrated second difference-signal with the product of the second difference signal and a factor. A second sum signal is formed from adding an integrated first sum-signal with the product of the first-sum-signal and the factor. A corrected signal is formed by a product of the second sum-signal and an equivalent tower height. A first nacelle-signal is formed by the arc-tangent of the corrected signal. A nacelle inclination is obtained from filtering the first nacelle-signal by a low-pass-filter. The feedback-signal is formed by multiplying the acceleration of gravity with the sine of the first nacelle-signal.