Two of the country’s first large-scale offshore wind farms are now fully operational, the developers announced this week, promising to power a combined 750,000 homes in Connecticut , Rhode Island , and Massachusetts .

Vineyard Wind became fully operational on Oct. 29, spokesperson Craig Gilvarg confirmed in an email to The Light Friday. On Thursday, another project, Revolution Wind, announced it had also come fully online after three years of construction.

Both projects finished installing their wind turbines earlier this year, Vineyard Wind in March and Revolution Wind in September.…