Infyenergy roof top solar solutions for commercial/ industrial/Residential/institutions/Hospitals customers reduce the cost of electricity to approximately Rs.3 per unit or less, and have a 3 to 4-year payback.your roof top can generate electricity by installing solar panels, and consume for your internal consumtion,excess electricity can be sold to escom in the existing line under net-meter/gross meter scheme for a period of 25 years with power purchase agreement roi in with in 5 years.