Sensible monitoring systems provide serious-time performance tracking and predictive servicing abilities. Feasibility of putting in solar panels without a contractor: It's not possible to set up solar panels and not using a contractor on some types of roofs, like slate roofs or very steep roofs, because it is technically tough. https://social-lyft.com/story10681421/solar-cell-sorlar-rooftop-no-further-a-mystery