Currently you get your electricity from an electric company. More than likely they are not producing the electricity, they are simply distributing it. The electricity has to travel from a power plant through the grid to a distribution center back through the grid to the transformer and pick up station to finally hit your house.
When you go solar you take the production and distribution systems and put them on your roof. This does two things: makes your electricity much cheaper and more efficient. More efficient because you don’t need to have the cables going hundreds of miles to get to the final location. Also, once they system is installed you are finished and there does not need to be any more resources taken from the environment. After all, the sun is the world’s largest most renewable energy source. Cheaper because just like when you purchased your home you realized that ownership is how you move forward in life. This works the same way! If you don’t rent your house, car, or couch, why do you rent your electricity?