While Australia worries over how to pay for its Central Electrical Transmission system, when everybody is going solar. Arizona has come up with an interesting idea.

From 2013... From article, (Arizona's biggest power utility, Arizona Public Service (APS), has announced their intention to implement what would effectively be a tax on the sun. The whole idea behind net-metering is that if you install a solar system on the roof of your house or business, you can buy power from the grid when you need it, and sell extra power when you have a surplus. Often these rates are advantageous to provide an incentive for renewable energy adoption, a very fair thing considering all the subsidies, direct and indirect, that fossil fuels have had for decades. But APS would like to start charging a monthly fee to sell clean power back to the grid (in their Orwellian language, they call it a "convenience charge"). A source says that that the fee could be of around $100/month or $1,200/year, enough to change the economic attractiveness of small systems. It's not entirely clear if the fee scales up for larger systems, but that seems likely.)

 Me, "It's going to take ideas like this to figure out how to pay for the central transmission system that provides power when solar can't. Sure, some of the fee will cut into what people sell back to the utility during the day. But at least its the first idea that can find a way of paying for the transmission system when solar power customers need it."
  No more free sun: Arizona's biggest power utility wants to tax solar