In France, also on the ground of the rules set up by the DG competition in the EC in Brussels, there must be no "state aid" (aid from tax payer money) for investment projects (including renewable projects) in order not to distort competition among technologies. That is why Germany and then France decided to compensate the over-cost of ARTs (advanced renewable tariffs or fair and efficient tariffs) not from state subsidies but from a specific regulation of the electricity market: a contribution from all electricity consumers on the same ground (€/kWh consumed), so without fair market competition rules distortion.
In Germany, E-on attacked such a scheme but they were rebutted both in Germany and at the European court of justice. France (as Germany) was obliged to submit its ARTs scheme to DG competition which admitted officially that it is not based on "state aid". To end with the story: in France the lobby of big electricity consumer industries get the decision from the government to have a contribution capped at a small level. DG competition has not ruled as "illegal" this market distortion.
For Spain, you have to check: I've read that "at the end" it is the government which compensate indirectly the FITs over cost from electric utilities because electricity price for consumers are still regulated and don't cover all the costs (not only for FITs) and so the electricity sector is subsidised every year. May be a reason for the September 2008 decision of the Spanish government to decrease the solar PV FIT (by around 30 %) and to cap the new installed PV capacity to 500 MW in 2009 and 400 MW in 2010 (instead of more than 2500 MW installed in 2008).
However, state and regional authorities subsidies to companies manufacturing RE components (wind turbine, PV modules...) are possible in Europe:
a) For R&D programmes (up to 100 % for universities, generally less than 40 % for private companies).
b) For investments for new production facilities in special locations such as low income regions (the list is issued by the European Commission). That
is why for example many solar PV companies (including from USA and Canada and Ontario) decided to place their PV manufacturing capacities in
the "solar valley" in a "new lander" where up to 50 % of initial investment was said to be possible. Of course, it is not the only reason: main ones
were also to be present on the German PV market (the larger in the world except in 2008 because of the Spanish surge) and the "synergy effect":
many local PV capabilities created (R&D in universities, specialised local work-force, specialised PV SMEs for components and services...)