The Ultimate Guide to Truck APUs: Save Fuel and Improve Comfort
Truck Auxiliary Power Units (APUs) are revolutionizing how long-haul drivers manage fuel consumption and comfort. By providing power for cab climate control, appliances, and electronics without running the truck’s main engine, APUs reduce idling time — saving fuel and decreasing engine wear.
Idling a diesel engine for extended periods wastes significant fuel and increases maintenance costs. Studies show that a Class 8 truck idles roughly 1,800 hours per year, consuming thousands of gallons of diesel. APUs can cut idling fuel use by up to 90%, leading to savings of $5,000 to $10,000 annually per truck, depending on fuel prices and usage.
There are two main types of APUs: diesel-powered and battery-powered. Diesel APUs are reliable and provide continuous power, while battery APUs offer quieter operation with zero emissions, ideal for urban areas with strict anti-idling laws.
Installing an APU requires considering truck compatibility, electrical system integration, and space for mounting. Professional installation ensures maximum efficiency and warranty compliance.
Beyond fuel savings, APUs improve driver comfort by enabling air conditioning and heating while parked, leading to better rest and increased safety on the road. They also help fleets comply with increasingly common anti-idling regulations, avoiding costly fines.
At APU Center, we provide a wide selection of APUs tailored for Freightliner, Peterbilt, Kenworth, Volvo, and other trucks. Our expert team can help you choose and install the right unit for your fleet’s needs.
Investing in a truck APU is a smart financial and environmental decision that benefits drivers, fleet owners, and the planet alike. Visit apucenter.com to explore our options and start saving today.



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hicles like long-haul trucks and RVs without the need to keep the main engine running. This functionality is especially important for saving fuel, reducing engine wear, and complying with anti-idling laws. Given the importance of an APU in maintaining vehicle efficiency and comfort, purchasing a used unit demands careful consideration. The market for used APUs can be daunting if you aren’t familiar with the specific aspects that need attention. Factors such as the unit’s specifications, physical condition, compatibility with your vehicle, and performance history are all crucial elements to examine. These considerations help ensure that the APU you choose will not only meet your power needs but also prove to be a reliable investment over time. By being thorough in your evaluation, you can make a more informed decision and avoid potential pitfalls. With so many variables at play, understanding these key areas can help you navigate the complexities of purchasing a used APU, ensuring that you get the best value for your money.

quality of life for drivers during long-haul routes. Additionally, Rigmaster APUs are instrumental in reducing the need for engine idling, a common practice used to power ancillary functions but one that results in unnecessary fuel consumption and increased engine wear. By offering a standalone source of power for heating, cooling, and electrical needs, these units directly contribute to a reduction in fuel use. This not only translates to considerable cost savings but also decreases the environmental impact associated with prolonged engine operation. Reducing engine idling is also crucial for extending the lifespan of the truck’s main engine, ensuring that it remains operational for longer periods without the need for significant maintenance or repairs. These core functions of Rigmaster APUs—enhanced climate control, independent electrical power supply, and a significant reduction in the need for engine idling—demonstrate their integral role in improving the operational effectiveness of truck fleets while simultaneously elevating the living and working conditions of drivers on the road.