The North American trucking industry is rapidly adopting 12V truck sleeper AC systems, driven by rising diesel prices, stricter anti-idling laws, and driver comfort needs. Electric Auxiliary Power Units (e-APUs) now enable overnight cab cooling without engine idling. Modern systems, such as Corunclima’s K50BS, deliver up to 15,000 BTU/h and run 10–13 hours on lithium batteries. Compared to traditional diesel APUs, electric units are quieter, emission-free, and lower-maintenance. Reliable cooling has also become key for driver retention, especially in hot regions like Texas, California, and Mexico. Real-world feedback confirms high demand for stable performance even above 90°F. Fleets can save over 1,500 gallons of diesel annually per truck. Compatible with Kenworth, Freightliner, Volvo, and International, these systems are part of a broader shift toward idle-free, sustainable trucking. As battery tech improves, the market for high-capacity electric sleeper ACs is set to expand further.