That system us actually a (usually) government mandated subsidy. Think about it: when you pay for power you pay not just for generation but for distribution as

That system us actually a (usually) government mandated subsidy. Think about it: when you pay for power you pay not just for generation but for distribution as well. When you feed it back and your meter runs backwards the power company should be paying you only for generation (at a wholesale rate, so they can turn a profit). In some countries they measure your power in both directions and give you a credit based how much you put back into the grid. This would be much lower than what you pay to buy power.