According to the Solar Energy Industries Association (SEIA) and Greentech Media Research (GTM), the average price for a residential solar installation is just below $3.00/W. That means if you purchase a medium sized residential system of 5kW, it would cost about $15,000. This does not factor in the 30 percent federal tax credit or any additional incentives.
The price of a solar system can vary by your location as well as by which equipment and system size you opt for. Installers will be able to walk you through several options depending on your budget and individual preferences. If you opt to finance your system you may owe very little upfront and see savings right away.