We don’t burn solar modules to produce electric energy. If we are able to reutilize 100% of them forever, we would manufacture an unlimited amount of electric energy per gram of material. Even practicalally, we utilize less PV material per kWh than uranium per kWh when we produce PV electric energy comparing to nuclear electric energy. The active materials amounts utilized in PV are little tiny.
Just how little tiny? To receive an up and coming tenuous film, known as cadmium telluride (CdTe), we utilize about 12 gm of this substance to create a square meter module. In a year on the average US location, we obtain about 11% x 1750 kWh/m2-yr, or 154 kWh/yr (after suming for another 20% in deviation losses, but not for an additional, but small yearly loss). Thus during one year, we demand 0.08 g/kWh. But wait! We don’t burn PV modules, and they don’t die after one year – commitments are about 30 years, so this is really one thirtieth of that, or 2.6 milligrams per kWh. Let’s tabulate it: (more…)