Ah, so you ask about high penetration. But it's not decentralised-or-not that counts there, but intermittency. On that subject, since we aren't anywhere near 100% in ten years by current trends, and PV and other penetration lags behind wind, it is a bit early to say -- there are regional model projects, but that's all. As for what the Netherlands should aim for in ten years, high penetration, also see Migeru downthread.

_{*Lunatic*, n.
One whose delusions are out of fashion.}