2022-05-19 · In-Cab Battery Powered Powered HVAC | Volvo Trucks USA Volvo Trucks recently introduced its own battery-powered HVAC system, the Parking Cooler, as a factory-installed option for all VNM 630, VNL 630, VNL 670, VNL 730 and VNL 780 sleeper models. It’s also available as an add-on for vocational drivers who want to maintain cab temperature without