There was no up front cost. They were not the cheapest. However they provided me with top of the line solor panels and inverters along with top of the line triple pane double argon gas windows.YOU GET WHAT YOU PAY FOR! Bottom line! Im very happy with my production so far and the installers were great. They didn’t just sell me solar…. They sold me a solar package. This made my old home much more efficient there by allowing my solar panels to really make a difference on my electric bill. Glad i went with 1800 solar USA