Micro wind power generation is one of the possible solutions to bring energy to the Non-Interconnected Zones (ZNI) of the Colombian Caribbean. To reduce the manufacturing costs and encourage the use of wind energy in these ZNI, this thesis aims to design and manufacture the rotor of a low-scale turbine using cheap composite materials reinforced with fique fibres. The wind turbine designed by WindAid, an NGO that installs wind energy in rural communities in Peru, was used as a starting point to meet the objectives of the thesis. The geometrical design of the rotor was optimised using an analytical model capable of maximizing the aerodynamic power generated. On the other hand, the critical load conditions of the rotor in La Guajira were established, following the recommendations of British Standard 61400-2. The first approximation of the rotor structural design was made by applying the finite element method FEM and using traditional composite materials with glass and carbon fibre. Once the prototype was manufactured, the structural design was experimentally validated using an instrumented bending test on the blades, obtaining differences of less than 7% with the numerical model. Subsequently, a composite material reinforced with a standardised fique fibre fabric was developed. Different modifications were made to the matrix and fibres to improve the material mechanical properties evaluated using tensile tests. Moreover, the failure mode of the composites was studied using computed tomography. As a result, a standardised composite with a strength of 111MPa and an elastic modulus of 6.1GPa was obtained. Finally, a blade design using fique fibres was evaluated using the FEM, and a test prototype was manufactured using the vacuum bag infusion method. The design with fique fibres proved to withstand the average turbine operating conditions in La Guajira. Furthermore, with the replacement of the synthetic fibres with natural fibres, the raw material cost was decreased sixfold, and its environmental impact was reduced.