Externe, and other studies show that the negative externalities of coal are typically around 0.05 euro and the negative externalities for wind/nukes/(well placed)hydro are too small to be worth counting -Therefore, the feedin tarrifs for hydro and wind are perfectly appropriate and at the right level by any reckoning. The rest of them are bloody bonkers. Subsidies at levels that high will not encourage the development of cheap renewable energy tech (because you can sell very expensive renewable energy tech with these subsidies and take baths in the profits!) The fact that  biofuels and photovoltaics do have significant negative externalities makes those subsidies complete insanity.