It's called anti-islanding and an important feature to any residential distributed generation. Most people probably don't know about it and if you are expecting the pv system to provide power during a grid event you will be surprised.
In a nutshell, when the inverter senses a disturbance on the grid it shuts down all power export until the grid is restored. As mentioned, the main reason is for lineman safety and secondarily it helps the grid operator as he doesn't have to fight a million inverters each doing their own thing.
I think the program sounds great, you get all the benefit with a small fraction of the cost. Let someone else worry about the reliability of the system and installation.