Pity it will be obsolete in a decade or two with the popularisation of mass consumer generator and storage devices!,(reply>), @smcleod04 On constructing the generators, probably yes, but the economy of scale on <b>maintaining</b> the generators is an entirely different story.,(reply>), +Rowan Evans Economies of scale is agnostic to whether or not your scale is in one large individual system, or in the massive construction of identical individual generating units.,(reply>), Is the reason you expect "economy of scale" to go from one of the most basic, fundamental and well-known ideas in economics to an obsolete concept over a decade or two?