3 ms·
> I can't quite grasp this - 40% to what? It's power efficiency. Sunlight hits the earth with power density Pi (measured in, say, Watts/m^2) and the solar pan
by jpmattia 12y ago
> I can't quite grasp this - 40% to what?
It's power efficiency. Sunlight hits the earth with power density Pi (measured in, say, Watts/m^2) and the solar panel puts out Po for the same area.
They've measured Po/Pi to be 0.4