After CEO Elon Musk extended an offer to help Puerto Rico earlier this month, Tesla is following through on a pledge to contribute to rebuilding the power grid devastated by Hurricane Maria, leaving thousands of people without electricity.

In a tweet Tuesday, Tesla posted photos of Hospital del Niño and the solar and power storage project that’s beginning there using the company’s Powerwall batteries. Musk has also donated $250,000 to relief efforts in Puerto Rico.

Musk first hinted at helping to rebuild Puerto Rico’s power grid in a tweet on October 5th; Governor Ricardo Rosselló promptly replied with, “Let’s talk.” Since then, numerous other companies have offered to help find power solutions for the territory that sustained upwards of $90 billion in damage in late September from Hurricane Maria.

Last week, however, Whitefish Energy, a small firm from Interior Secretary Ryan Zinke’s Montana hometown, said it would be awarded the $300 million contract to fix Puerto Rico’s electricity problem.

Rosselló has said the goal is to get 95 percent of Puerto Rico’s power back online by Christmas.

Update: An earlier version of this story misstated damage estimates to Puerto Rico.