The company also confirmed that none of its staff were injured and none of its assets damaged after Hurricanes Harvey, Irma and Maria.
The island was left without power following the storm last month.
The Puerto Rico Electric Power Authority had led efforts to restore power, but two weeks after Maria battered the island, little progress has been made.
As of 1 October, approximately 95% of electricity customers were still without power, according to the United States’ Economics and Statistics Administration.
Texas’ 12,000-plus wind turbines seem to have emerged largely unscathed after Hurricane Harvey struck near Corpus Christi on 25 August, according to the American Wind Energy Association.
Pattern Energy was one of several companies in the American wind power industry who donated a combined €1 million to aid repair and rebuilding after the storm.
Apex Clean Energy, Blattner Energy, Duke Energy, EDF Renewable Energy, EDP Renewables, Enel Green Power, E.on, Hannon Armstrong, Invenergy, Leeward Renewable Energy, Map Royalty, TPI Composites and the American Wind Energy Association also donated to the fund.
The donors also pledged to send volunteers to help with the rebuilding effort in the state.