Add to Cart KTD-3 12V Rooftop Semi-Truck Air Conditioner Kingtec MSRP: Now: $2,828.95 Was: 12V Rooftop Air Conditioner This battery powered semi-truck AC unit is a great way to keep your heavy-duty truck, live-in or work van, RV, or small-equipment cab cool while the engine is off! Kingtec KTD-3 Low-Profile Rooftop Air Conditioner for... MSRP: Now: $2,828.95 Was: Add to Cart