REFEST is a 3-year EU project with 14 partners from 10 countries, aiming to reduce fuel consumption and greenhouse gas emissions by up to 40% in small fishing vessels. The project develops scalable, easy-to-install retrofitting solutions such as battery propulsion, solar power, improved hull design, and digital monitoring systems. All technologies are designed to be sustainable, cost-effective, and ready for wide adoption, with full consideration of environmental impacts and end-user needs.