1. I have not seen IEEE 1547-2003 as this question pertains to it. They say that small PV systems are tied into the grid, if the wave sign of a PV inverter is a square wave how does that marry to the wave of electricity flowing on the existing grid? Does this current just get gobbled up so to speak or is this considered dirty current and goes no where past the net meter? 2. Relevant equations I have no equation. 3. The attempt at a solutionThe solution would require an electrical engineer familiar with IEEE 1547-2003.