I have solar panels on my house. During the summer when they produce more than I use, pretty much all the excess power goes into my neighbor's house. So if th

I have solar panels on my house. During the summer when they produce more than I use, pretty much all the excess power goes into my neighbor's house. So if the utility says "you pay retail when the meter spins forward, but get wholesale credit when it spins backwards", then I could make a deal with my neighbor to run some power lines from some of my panels to his side of his meter and charge him just below retail. That way my neighbor and I both pay less for power overall. This arbitrage shows that only crediting wholesale prices is the wrong price.