OK, just for fun, I did a calculation of the amount of solar insolation arriving on planet earth at any given second. Using as a base for the visible area facing the sun a diameter of 8,000 miles it works out to very close to 140 billion MW at any given second in time.
This has nothing whatsoever to do with reality. If we were ever to be able to capture just 1% of that amount, it would be a staggering achievement indeed.
