APUs: Diesel or Electric?
When choosing the right auxiliary power unit (APU) for your semi-truck, the two main options on the market are electric APUs and diesel-powered APUs. Each has advantages and drawbacks depending on your operating style, fuel efficiency needs, and budget. In this article, we’ll explore the key differences between electric and diesel APUs to help you make an informed decision.
Pros:
Zero Emissions: Electric APUs don’t burn fuel, making them environmentally friendly and compliant with anti-idling regulations.
Quiet Operation: No engine noise means peaceful rest and no complaints from neighbors at truck stops.
Lower Maintenance: With fewer moving parts, electric APUs typically require less upkeep.
Cons:
Limited Runtime: Most electric APUs rely on battery power and may only last 8–10 hours before recharging.
Battery Dependency: If you’re parked for long periods without solar panels or a shore power connection, you may run out of energy.
Upfront Cost: High-quality battery-powered APUs can be more expensive to purchase and install.
Pros:
Extended Runtime: Diesel APUs can run continuously as long as fuel is in the tank, making them ideal for extended rest periods.
All-Weather Performance: Performs well in extreme temperatures, providing heating or air conditioning as needed.
Power Output: Offers more wattage for powering appliances like microwaves, fridges, or laptops.
Cons:
Fuel Consumption: Although more efficient than idling your engine, diesel APUs still burn fuel.
Noise and Vibration: Diesel engines produce noticeable sound and vibration, affecting sleep quality.
Maintenance Needs: Diesel APUs require regular oil changes and part replacements like any combustion engine.
Regarding replacement parts, diesel APUs tend to be more available because they’ve been on the market longer. However, electric APUs often have fewer components to replace, reducing the chances of mechanical failure. For both types, it’s essential to work with reliable suppliers. Websites like FinditParts can help you source APU parts quickly and at competitive prices.
A diesel APU might be your best bet if you run long hauls and need extended off-engine power. But if you prioritize quiet rest, lower emissions, and are willing to manage battery life, an electric APU could be the more brilliant, greener choice.
Always on the go? The Wireless Hotspot is the perfect travel companion.