Heritage Solar did a very good job. They put in a 28 panel system on top of my roof and worked with me on being able to buy larger inverters. If I wanted to add more panels in the future, I didn't have to buy anything but the panels. They also divided the panels so the inverters wouldn't be overworked or overheating and everything's running very well. We're really pleased with what they did. They came when they said they would, did the work in about 2 or 3 days, and it's been two years now with no leaks on the roof. We've no problems. There's been rainstorms and nothing's come undone.