Feb 18, 2016 · Volvo Trucks' new battery-powered parking cooler provides heating and cooling to the cab and sleeper without the need to idle the engine, reducing fuel use and emissions. Volvo Trucks North America has introduced a battery-powered parking cooler as a factory-installed option for its VNM 630, VNL 630, VNL 670, VNL 730 and VNL 780 sleeper models.