[wolfram74]

This is a thing I've been curious about lately, how close do they have to be? 100 meters? 50 meters? 10? Grid tie ins at a certain point get way beyond my V=IR and V^2/R=W intuitions.

Given the length of the interconnect queue these days, I'm assuming a lot of industrial/large power draw systems will start to just colocate with enough pv+wind+storage to have a local grid with a very small if any connection to the exterior grid.

Obviously it's a cost, but it's one less action item on the set up process and one less possible area for delay, there will be cases where the cost pencils out.