Many times the utility will only pay you for their cost savings of 'avoided' fuel, since they still have to amortize the capital cost of overhead lines and other distribution equipment.

In our area that means a charge of $0.10 to $0.12 for each kWh that you use, but credit of only about $0.03 per kilowatt-hour.

Under that structure, you would pay $0.12 per kWh to the solar company, and receive only $0.03 in return, so it would cost you $0.09 for each kWh that the cells generated.

As I said, I saw no benefit to that scheme...