Example of a Plug-in Hybrid (IMAGE) Chalmers University of Technology Caption The new method can be used to calculate the cost-efficiency of plug-in hybrids such as Volvo XC60 Plug-in Hybrid Concept. Credit Volvo Car Group Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.