Do we have enough sunlight to collect in USA?  
Yes! Different locations have different meteorological conditions. In most of the populated areas in USA, our sunshine radiation is no less than many other countries where solar products are popularly used. On average basis, USA has 20% more sunlight strength than Germany and NY is at the same latitude with Austria. Germany is leading USA more than 100 times in using solar energy, and in Austria 1 out every 7 homes has a solar system. In New York, experimental research shows that sunshine radiation of the city is almost the same as in Miami.