In a letter to the EC the associations – including the European Wind Energy Association (EWEA) and SolarPower Europe – point out that renewables investments in Europe halved in just four years from $120bn in 2011 to $65bn in 2014.
The renewables groups are particularly concerned about "abrupt" retroactive changes that have altered the viability of existing projects.
“In the absence of any tangible European instrument to protect their legitimate expectations, investors have resorted to legal challenges at a national level and to international arbitrations," says the letter.
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