EBITDA also fell 2% to €373 million in the first quarter of 2017. The results were also "impacted by an above-average first quarter in 2016," EDPR said.
Revenue was 4% higher at €528 million as increased generation in North America and Brazil counteracted a marginally lower average electricity price at €60.50/MWh.
Load factors from its generating assets in Europe fell four percentage points compared to 2016, which enjoyed "outstanding" wind resource, the developer said.
The firm also suffered an approximate $9m increase in operational costs due to the timings of property taxes in the US.
The cost of EDPR's debt has been cut by restructuring and prepaying €2.4 billion since the first quarter of 2016 while repayment of a further €1.4 billion has been extended from 2018 to 2023.
EDPR's share price reacted by falling 0.85% to €6.99 by midday 2 May. This brought it closer to the €6.80 price parent-company EDP offered for the 22.5% of the shareholding traded on the Lisbon stock exchange in March.