Hi Tom Can I suggest that more research is needed Question ==...

Hi Tom

Can I suggest that more research is needed

Question == how are you measuring the power in and power out to attain that efficiency ?
Have you calculated the cost of power in and power out
Have you researched the cost of materials in and materials out inc all the rare earths, which are not available in sufficient quantities and probably never will be obtainable

It is not the easy answer than your post suggests