Comment 20kW is not fast enough (Score 3, Informative) 49
Tesla superchargers charge at 120kW with a wired connection. 20kW is not fast enough to quickly charge an electric vehicle that has enough batteries to provide adequate range. Even the Fast DC chademo chargers for the leaf can charge at 50kW.
Fast wireless charging will never happen because wasting 10% of your power as heat under the vehicle will cause things to melt at high power rates.