I doubt it would be required by law if it was just an issue of someone's inverter tripping overcurrent proteciton
> I’m sure this has motivated someone who makes rules, but I once had occasion to ask some actual line workers replacing equipment serving me, and they laughed. They said that they always assumed the lines were hot at both ends, and if they needed a line to be de-energized for safety, they would deliberately short it out. A pesky little residential inverter was not in the slightest bit concerning to them, anti-islanding or no.
Well, that's generally good safety measure.
> But mostly I think the most important current reason for anti-islanding is that a small residential or light commercial inverter is unlikely to have anywhere near the capacity to power an entire secondary circuit, nor does its owner want it to.
Many places do, hell, common problem is grid voltage being too high and inverters turning off because too many neighbours got solar. I'd imagine its pretty easy in peak to have solar exceed local demand even if only part of houses have it. At the very least "to the next transformer".
I wonder whether the move to green energy would change the way grids are build. "Micro-grid" with all houses on street connected to substation with a bunch of batteries that most of the time just stores local peak and sells it back to the residents might be an interesting idea and potentially make grid more resilient overall.
