the issue with backfeeding into the grid is that it can be very complex; you need to exactly match frequency/voltage etc., have an automatic cutoff in case of power outages etc., because you could potentially damage your neighbours electrical equipment otherwise AFAIK.
i remember talking to a german colleague about it ten years ago - he had a small gas turbine in his house for microgeneration, and the german government had some scheme to fast track the licence process to backfeed; but in ireland back then the licence to do so - which was essentially to become a supplier - was extremely expensive. 10-15k IIRC.
i remember talking to a german colleague about it ten years ago - he had a small gas turbine in his house for microgeneration, and the german government had some scheme to fast track the licence process to backfeed; but in ireland back then the licence to do so - which was essentially to become a supplier - was extremely expensive. 10-15k IIRC.