I have a PV system, grid connected, from Maine Solar Solutions. If I had to start over and do it again, I would choose them! from initial contact, which they responded in 15 minutes, to the install and paperwork, they walked me through it. I did get other quotes with the exact same Solar Edge equipment, but they were higher priced, and slow to respond. Included is a warranty for parts, labor and performance, which is transferable to susequent owners of the property. The installers were easy to talk with, answered my questions, and cleaned up afterward.