Home Solar Power Guide What is the difference between photovoltaic solar power systems and solar cells?

What is the difference between photovoltaic solar power systems and solar cells?

I am a environmental friendly person and love to do everything without harming the natural beauty. I recently bought a new home in Chicago and I was planning to install solar cell here. One of my friend was saying that photovoltaic solar power systems are much more good then solar cells. But I do not know the exact difference between the two. Please provide a detailed information backed with reference link. Thanks