More and more areas have energy buy-back programs (called net metering), allowing owners of solar systems to sell excess electricity back to the power company. The power companies like it, because they buy electricity from you when they need it the most, during the day, when companies and air conditioning units are running at their peak. It is a true win-win situation.
To determine your electricity useage and actual costs associated with your use take a look at your electric bill. For an example, click here.
Some owners choose to remain off the grid if the cost of extending electrical lines to the house is not cost-effective. Some decide to become independent of all utility companies or want to go completely green. Those who choose to remain independent of the grid can still generate power for themselves in the event that the grid power cuts off, as in the event of a storm. These off grid systems use batteries to store the solar electricity to be used when the sun isn't available.
Electricity from Sunlight
Photovoltaic solar energy systems use sunlight to generate electricity. It lowers your utility bill, and helps reduce fossil-fuel consumption and global warming. A system lasts for many years, and adds to the value of your home.