After you install solar panels on your roof, it takes about two to four days for them to start working. Once they're connected, they will start producing electricity immediately. However, it unfortunately isn't this simple and to allow conversion of this electricity for the home, there are more steps that must be. This stage can take anywhere from a few days to several weeks, depending on how quickly inspections can be scheduled and completed. This process can take a few weeks to complete, depending on various factors. Understanding each phase helps homeowners prepare for solar panel.