Depending on the amount of power you need, the system could cost anywhere between $800 to 38,000 and this amount is excluding the labor cost. Even if the expense is a bit high, it is worth it in the lengthy run, as you will save a whole lot of money on power bills. Besides you'll be able to also sell power back to the power grid and get a return on investment. Not much maintenance is needed and also the solar power system will run up to 30 years.