Power generator, wave energy converter or sensor apparatus for water wave energy harvesting

A triboelectric apparatus comprising:

• nested and enclosed shells;
• sets of balls located between the shells, and one of the sets of balls being located internal to an innermost of the shells;
• spaced apart electrodes located inside each of the shells against which the balls rotate;
• and
• an electrical circuit coupled to the electrodes.

A power generator apparatus comprising:

• multiple nested sets of electrodes coupled together, each of the nested sets of electrodes including spaced apart electrically conductive surfaces, and an outer one of the nested sets of electrodes having a larger periphery than and surrounding a periphery of an inner one of the nested sets of electrodes with a spaced apart area therebetween;
• multiple moveable chargers, at least one of which being located in the area between each adjacent pair of the nested sets of electrodes, and at least another of which being located internal to the inner one of the nested sets of electrodes;
• and
• each of the chargers being moveable between the electrically conductive surfaces of the associated nested sets of electrodes when the nested sets of electrodes are moved.