A Wireless power transfer system was developed over a hundred years ago by Tesla. https://en.m.wikipedia.org/wiki/Wardenclyffe_Tower#Design_and_operational_principles.
Indepedent power systems using PV technology, integrated charge controllers and Tesla battery power panels would cost under $50k including installation for a 3 bedroom single family home. 
Currently the majority of PV systems in Hawaii are using micro-inverters that can only feed back power generated by PV to the grid. These systems do not power the home, thus leaving the home dependent on grid connectivity. If HECO goes down so does the micro-inverter PV system. The only true result from this design is a lower monthly utility bill via NEM (note: new NEM connections are not available thanks to HECO).
Existing PV/NEM authorized users can upgrade their systems by integrating charge controller/battery and a automatic transfer switch that would provide them with independent power and still have feedback benefits to the grid.