At the time your utility approves your interconnection, an installation generally lasts a single to a few days for residential rooftop; longer for ground mount. First, there is a 30% federal tax credit score available for you if you put in a solar panel inside your commercial or residential constructing. https://perthsolarpanelinstallation.blogspot.com/2025/01/a-guide-to-best-solar-solutions-for.html