Now,knowing about this solar or sun energy, we need to know how does it work? how does the sun give its energy to produce electricity? how does the sun help the solar heater to work without any intervention of any electricity? Initially i would say you all, for any work to be done the technology used is alone not important but how the technology is used along with its physical construction is also important. For example, if you love to ride the bicycle, and you been certified as an expert in cycling , is this alone enough to do cycling whenever you wish? No. Along with your knowledge of cycle you still need a cycle too, which will full fill your desire to cycle.