A tiny layer of dust can drastically affect the light-harvesting ability of solar cells – just a few grams per square metre can cut the efficiency in half
It is really dusty in Texas, and solar panels probably would have to be cleaned every day to keep them working close to capacity. Suppose that one person could clean 100 solar panels a day.
Texas could employ 20 million solar panel cleaners! Workers from Juarez are used to working for about $25/day, so they could probably sneak 20 million illegals across the border and keep the panels clean for only $165 billion per year.