I'm not sure that there has been an improvement. It's not really a manufacturing problem, it's a technology problem and the storage capacity of batteries, the energy efficiency of solar-to-power conversion of solar panels, etc. another example...
Solyndra was a manufacturer of cylindrical panels of copper indium gallium selenide (CIGS) thin film solar cells. It was based in Fremont, California. In 2009, Solyndra received a $535 million U.S. Department of Energy loan guarantee, the first...
this is a very good video - have watched in the past. He knows this stuff because this is what he was brought to Apple to be in charge of. BUUUUUT...it's not that we can't do that in this country, it's that we ceded a lot of manufacturing to...