Disclosed herein is a method for determining the arrangement of wave energy converters in a wave power park in a seabed or lake area including the steps of: measuring wavelength and wave direction over a period of time, collecting all values measured for the wavelength and the wave direction in a matrix, statistically determining, from the matrix, a predominant wavelength and a predominant wave direction, and arranging an amount X of wave energy converters at regular intervals over a distance that corresponds to half of the length of the predominant wavelength or a multiple thereof, where the distance is measured in a direction at least more or less parallel to the predominant wave direction.

A self-starting Savonius wind turbine includes a frame, a rotor assembly that is rotatable about a central axis of rotation and an energy utilizing device operably connected to the rotor assembly. The rotor assembly has at least two rotors, each rotor having at least two rotor blades. Rotation of the rotor assembly is initiated by wind coming from any direction blowing on any one of the plurality of blades. The rotors are configured in a stacked orientation with the blades fixed at a rotated angular position relative to one another to start rotation of the rotor assembly in variable wind conditions. The rotor assembly is made of a composite laminate and the frame is made of a durable, lightweight material. The frame and the rotor assembly are assembled into a single unit for transportation and utilization.

Multiple vertical-axis wind-turbines are aligned in a geometric array relative to a horizontal-axis wind-turbine. The vertical-axis wind-turbines are placed in close proximity to the horizontal axis wind turbine. The turbines are in close enough proximity to each other to have an effect on wind conditions that create lift on a turbine blade and turn the rotor of the horizontal axis wind turbine. The wind conditions caused by the vertical axis wind turbines include any of i) a wind wall effect, ii) increased pressure difference between a front side and a back side of the rotor of the horizontal axis wind turbine, and iii) downwind vertical mixing of the air. The vertical-axis wind-turbines and horizontal axis wind turbine are configured to use the wind conditions to convert wind into increases in generated electrical power.