How sunlight becomes electricity, why a panel's output moves with temperature and shade, and how to tell a healthy array from a failing one. Physics and engineering only — no products, no prices.
The difference is how the silicon atoms are arranged — or whether there is silicon at all. What crystal structure costs, what it buys, and when it matters.
Dirt costs output, but the wrong cleaning method costs the module. What soiling does to light, what damages glass and coatings, and a method built around both.