Hence the pirate power stations we used in the Diaxaris project were entirely off grid.

Private property, off grid or micro grid (also known as an island system) is the way to go, but as a model it works mainly for new development or mobile communities. You try clipping the power lines to a house, they get bent out of shape. Now one way to play is to take a larger property and make sections of it go off grid, like outbuildings.