MV Lochinvar is a pioneering diesel electric hybrid ferry built for the Caledonian MacBrayne service between Tarbert and Portavadie. She is one of only two passenger and vehicle roll-on, roll-off ferries in the world to incorporate a low-carbon hybrid system of diesel electric and lithium ion battery power and is the second hybrid ferry commissioned and owned by Caledonian Maritime Assets. Both ferries are sea-going and are nearly 150 ft long, accommodating 150 passengers, 23 cars or two HGVs.