Until now, Block Island’s power grid was completely isolated from the mainland. The construction of the wind farm and its connection to the mainland allowed the island to connect to the New England power grid for the first time.

Mike Jacobs, an energy analyst for the Union of Concerned Scientists, said the Block Island connection is an example of how renewables are helping to displace fossil fuels on the power grid.

Though offshore wind farms are common in Europe, the Block Island Wind Farmis the first ever built in the US — a demonstration meant to help prove the viability of offshore wind in the US

Block Island, Rhode Island. Wikimedia Commons The farm marked a historic moment last December when its five wind turbines generated electricity commercially for the first time. The occasion marked the birth of an industry that the Obama administration hoped would flourish off the Atlantic coast, helping to wean the US away from electricity generated using fossil fuels.

The offshore wind power potential in the US is huge. If fully developed, offshore turbines could supply four times today’s total US electricity generating capacity — enough to power roughly 800 million homes.

“Having an operating project demonstrates to the rest of the industry, including the supply chain, that a project can be built, and the same to state governments whose political and financial support for these early projects will be critical,” said Jeremy Firestone, director of the Center for Carbon-Free Power Integration at the University of Delaware.

In recent months, developers have won leases from the federal government to build other offshore wind farms along the Atlantic Coast. Projects likely to be completed in the next several years include wind farms off the coasts of Long Island, Maryland, and Delaware, Firestone said.

The shutdown of the Block Island diesel plant came three days after President Trump signed an executive order taking steps to lift restrictions on offshore oil and gas development. One of the administration’s main goals is to expand fossil fuel development as much as possible across the US and offshore. At the same time, it has shown no sign that it will stand in the way of expanding offshore wind development, Jacobs said.

“Broadly, there’s been positive support from the Trump administration for offshore wind,” Jacobs said.