Bangor Marina on Belfast Lough is switching its electricity to a renewable source with immediate effect.
Marina Manager Kevin Baird said the marina takes its responsibility to the environment seriously and is constantly looking at ways in which it can reduce its impact on the planet.
"We estimate this fully renewable supply reduces our carbon emissions by up to 1000 tonnes a year compared with traditional carbon led electricity supplies, which is a massive positive impact", Baird said.
Northern Ireland's biggest marina is part of a network of 11 'boatfolk' operated marinas around the UK all now sourcing fully renewable electricity, and with minimal impact to the price.
The facility at Bangor is a multiple winner of the Blue Flag Award and a Five Gold Anchor Marina. There are facilities for 550 berths with berthing for 50 visiting craft. Laundry, showers, trolleys and local advise provided for sailors.
Baird told Afloat "We're on a journey to reduce our carbon footprint and this is a crucial next step on that journey. 2021 is an important year for the world's efforts to tackle climate change and choosing 100% renewable electricity isn't just a 'feel good' thing to do, it's something that has a very real impact."