Solar systems only work where there is abundant sunshine. It won’t work for me.
The largest solar markets in the world are Germany and Japan (roughly 5 and 3 times the size of the US market). Latitude wise the most Southern portion of Germany is the same as the northern tier US states close to the Canadian border. The average usable sunlight in Japan equals that of Michigan and Illinois (hardly the Sun Belt). Solar electric power systems work anywhere that the sun shines. Of course, in areas where there is abundant sunshine like Arizona, a smaller solar system will provide as much power as a larger system located in Maine or Washington State for example. But, solar works just about anywhere and makes a difference on your utility bills and in the amount of greenhouse gases emitted through the burning of fossil fuels. If there is enough light to see your hand in front of your face then solar panels can produce electricity.