BUCHAREST — With more wind turbines already built than any of its neighbors, Romania has gained a reputation as a prime location for green energy investors. Yet proposals now to cut subsidies for clean energy producers have deeply alarmed foreign companies drawn to its market.

In recent years, the country has been host to a boom in renewable projects. Wind farm generating capacity in particular soared to 1,794 megawatts last year, from just 13.1 megawatts in 2009.

Under legislation enacted in 2008 and implemented in 2011, energy distributors have been required in the past two years to purchase “green certificates” for every megawatt hour of power that they sold. The certificates are issued to wind, hydro and solar power producers who can sell them directly to distributors or trade them on the state-owned power market, Opcom. Distributors can — and do — pass on the cost of buying certificates to their customers.

With more than 2,000 megawatts of all forms of renewable production capacity now installed and about as much under construction, Romania is already near its goal, agreed upon as a member of the European Union, of meeting 24 percent of its energy needs from renewable sources by 2020.