The administration of U.S. President Donald Trump has canceled solar projects in Puerto Rico worth millions of dollars, as the island struggles with chronic power outages and a crumbling electric grid.

The projects were aimed at helping 30,000 low-income families in rural areas across the U.S. territory as part of a now-fading transition toward renewable energy.

In an email obtained by The Associated Press, the U.S. Energy Department said that a push under Puerto Rico’s former governor for a 100% renewable future threatened the reliability of its energy system.

“The Puerto Rico grid cannot afford to run on more distributed solar power,” the message states. “The rapid, widespread deployment of rooftop solar has created fluctuations in Puerto Rico’s grid, leading to unacceptable instability and fragility.”

Javier Rúa Jovet, public policy director for Puerto Rico’s Solar and Energy Storage Association, disputed that statement in a phone interview Thursday.