The first two systems are based on the Volvo C30 Electric and the third is based on the V60 wagon. Both systems for the C30 necessitate a smaller battery pack to fit the internal combustion engine installed under the rear load compartment floor and its 10.5 gallon (40 liter) fuel tank. All three systems feature brake energy regeneration.
The first C30 Electric-based concept uses a series-connected range extender which utilizes a naturally-aspirated 60-hp three-cylinder engine. The I-3 is connected to a 40 kW generator which drives the car’s 111-hp (82 kW) electric motor. The system offers a driver selectable option to let the generator charge the battery pack, increasing the car’s operating range on electric power alone. Volvo claims this range extender increases the electric car’s range by as much as 620 miles (1000 km) over the 69-mile (110 km) range of the battery pack.