Are they saying you can't sell it to your neighbors or just not back to them? I'm not sure but that might be because the concept of selling it back to them could have been more of a sales pitch to incentive people to take the plunge into solar that a practical reality. 

This is admittedly not my area of expertise but I always suspected that with low transmission efficiency and possibly the need to upgrade infrastructure to allow pumping excess energy into the grid, the sell it back angle was a sales scam.

I'd be interested to learn from people thet know more about it if my instincts were right or wrong.