On-Grid Solar Definition: On-Grid Systems are solar PV systems that only generate power when the utility power grid is available. They must connect to the grid to function. They can send excess power generated back to the grid when you are overproducing so you credit it for later use. These are are the simplest systems and the most cost-effective to install. ROI of the solar on-grid system is 3-5 yrs. They are cost-effective enough to pay for themselves and put money in your pocket long term. If you want to reduce your electric bill and your carbon footprint this is a good choice. AutoSys Indore provides the best quality installation of the Solar on-grid rooftop system. We use the best brand products in solar installation. We are authorised dealer for Kirloskar Solar Technology Pvt. Ltd.