Well, it depends a little on what you want to compare them with. Photovoltaic modules generate electricity from the sun. The only real drawback with photovoltaics is that you are going to have less power available on less-than-sunny days. However, they still work, even on cloudy days. They will eventually pay for themselves in terms of the energy savings compared to buying from the grid. Also, most energy companies have the capacity to hook up a photovoltaic system as an adjunct, so that you will draw from the grid if your demand is greater than the supply, and you will sell the power back to the utility if your supply is greater than the demand.
Photovoltaic modules is just a fancy word for solar panels, which is made of transparent film and assembled solar cells. The advantages of using solar panels is you save on electricity if you use them for your personal energy source. It is a renewable source, so we’re not wasting the earth’s resources. It produces no pollution, and requires very minimal maintenance.
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