Wind power existed for hundreds of years before we started drilling for oil. I doubt you can make useful solar cells, but you can make useful windmills, rechargeable batteries, light bulbs (incandescent), and motors.
However just the above list needs a large list of industry to pull off. Can you make a wire? What about a ball bearing - they are made by the millions of insane levels of precision and are cheap. All those little details are why you can't pull it off. Sure if given all the parts you can pull off the next step, but there are so many steps you can't do it.
However just the above list needs a large list of industry to pull off. Can you make a wire? What about a ball bearing - they are made by the millions of insane levels of precision and are cheap. All those little details are why you can't pull it off. Sure if given all the parts you can pull off the next step, but there are so many steps you can't do it.