The plans, which were announced in 2010, would have seen Enercon build a manufacturing plant in Galicia.
Speaking to Windpower Monthly, Juan Ruiz-Jarabo, head of the company's Spanish division, said the investment was on hold due to the country's indefinite national renewables moratorium.
Delays in Spain, Europe's second biggest wind market, are particularly significant for Enercon. As opposed to many of its competitors, the company's strategy is to focuss mainly on Europe.
It has kept away from two of the world's two biggest markets, USA and China, due to existing and potential patent disuputes, respectively.
Ruiz-Jarabo revealed wind developers committed to Enercon technology were allocated 543MW in the 2010 call for offers for 2.3GW in the northern region of Galicia. It was wrongly reported at the time as 285MW by the regional government.
Enercon subsequently approved an investment of €23.1 million in a new turbine facility in Galicia.
With wind sector fears the moratorium could last to 2015, Ruiz-Jarabo says Enercon will stick with its Galician clients "as long as it takes".
He indicated Enercon maintains the same commitment in Valencia region, where its plans for a turbine tower facility are still pending regional government orders for Enercon clients to build the 300MW allocation granted in 2003.