Homeowners who live in areas with high electric costs can see their utility bill gradually shrink with the installation of solar. According to the United Sates Department of Energy the exact amount you will save on solar depends on electricity consumption, solar system energy size, whether you purchase or lease your system, direct hours of daily sunlight, size and angle of roof, and local electricity rates. Local electricity rates tend to play the biggest factor when it comes to saving on solar systems. If the costs of generating solar are lower than your current electric cost, then you will see savings by switching to solar.