I watched the video on youtube where larry discusses his panel that he makes for around $550. Looks pretty damn nifty if I do say so myself. But, in that short ten minute video larry said something that I can not quite figure out. He stated that his setup is not selling back power to the electric company but instead is supplementing his power usage. Then in the next sentence he stated that sometimes he watches the meter going backwards. Now as far as I understand it, if the meter is going backwards then power is leaving your system and heading out to the grid. To me this is a clear statement that he is 'selling back power' as he will not be charged for that electricity since the usage you are charged for is directly related to the meter reading at the end of the month. Can anyone tell me exactly what he meant, if not larry himself, as I don't see the difference at all. Unless larry knows for a fact that he can not produce enough electricity to have a zero consumption at the end of the month and if he did the only way to get paid for that which he produces in excess is to use net-metering. I also live in PA about 2 1/2 hours north of larry and would very much like to know what he means. I plan on using a setup very closely to larry sometime in the future and if I can get away with non-ul listed grid-tie inverter then I see it as a cost benefit to me and am inclined to venture down this path myself.