turns a shaft 294 on electric generator 292 accordingly coupling 290 and clutch 291 comprise one form of an exemplary power take off pto system although this particular embodiment depicts coupling 290 clutch 291 and generator 292 as being at the bottom end of spar 210 they can also be arranged at the top of spar 210 additionally in the embodiment depicted in fig2 a generator 292 is small enough to fit inside spar 210 this can allow for a greater range of travel of float 220 along the length of spar 210 in other embodiments generator 292 can be positioned outside of spar 210 in such an embodiment generator 292 can have a diameter greater than that of spar 210 in another embodiment magnets 272 and metal plates 274 are not inside spar 210 but are integrated into float 220 in place of cylinder 225 cylinder 225 is positioned in spar 210 and mechanically connected to harness 282 and ball nuts 280 approximately where magnets 272 and metal plates 274 are in the embodiment described above fig2 c depicts another embodiment of system 200 in this particular embodiment ball screw 260 and ball screw nuts 280 are replaced with a screw shaft 261 and a roller screw nut 281 respectively as roller screws are well known in the art the inner workings of roller screw nut 281 are omitted from fig2 c as float 220 moves up and down magnet piston assembly 270 is pulled up and down pushing or pulling roller screw nut 281 along screw shaft 261 causing screw shaft 261 to rotate in one embodiment a roller screw nut.