Many factors determine cost, as pricing is specific to each project. Considerations include: Size, mounting system, roof material and pitch, wiring runs, and other installation details. One of the greatest variables in cost is the quality of specified equipment. Solar Works uses only materials and components we submit to a rigorous vetting process, which may result in a slightly higher upfront cost. But we know from decades of experience that installing top quality products is far more cost effective in the long term.