Most residential rooftop solar installations are grid-tied devices, meaning they remain linked to the utility grid. This relationship allows homeowners to: Feasibility of putting in solar panels without a contractor: It isn't possible to put in solar panels with out a contractor on some types of roofs, like slate roofs https://bluetechsolarcell.com/solar-cell-%e0%b8%81%e0%b8%b1%e0%b8%9a-solar-rooftop-%e0%b9%81%e0%b8%95%e0%b8%81%e0%b8%95%e0%b9%88%e0%b8%b2%e0%b8%87%e0%b8%81%e0%b8%b1%e0%b8%99%e0%b8%ad%e0%b8%a2%e0%b9%88%e0%b8%b2%e0%b8%87%e0%b9%84%e0%b8%a3/