I am trying to build a quadcopter that is powered from the ground. The quadcopter requires 800-1000 watts when at full power. I want to send high voltage DC up the tether so the overall gauge of the wire is smaller, and therefore lightweight. Lifting capacity of the quad is 15lbs, so I need to find a cable/wire that is lightweight enough to have a length of around 300ft. A high voltage DC-DC converter will be used onboard the quad to step down the voltage to around 22.2v-29.6v What voltage and current would I need to send UP the wire to meet the requirements at the quad? What kind of wire could handle enough power for the quad to reach 300ft, while staying under 15lbs? Of course the higher the quad, the heavier the wire becomes. Pardon my ignorance, just looking to be pointed in the right direction.