Maxol is adding a new electric vehicle hub as it starts work on expanding its service station in Holywood.
The family-owned company said the Kinnegar Service Station redevelopment would create 20 new jobs when complete.
The project will also support 40 construction jobs.
The firm said it aimed to use technology to reduce the site’s existing carbon footprint by up to 40%.
Solar panels are being added to cut the branch’s electrical import requirements.
Low-energy CO2 refrigeration systems and exhaust air-head pump technology are also being deployed.
Maxol said it was adding Northern Ireland’s first dedicated electric vehicle hub, capable of servicing up to six vehicles a time.
It said the hub would provide up to 200 kW in power, the highest charge currently available to the public in Northern Ireland.
Maxol chief executive Brian Donaldson said the development was a “significant step” on its path to sustainability.