The Smart, All-Electric APU Built for Today’s Trucking Demands
Polar Fox APU is the next-generation electric auxiliary power unit — engineered for simplicity, built for durability, and powered by cutting-edge lithium technology. Designed and assembled in the USA, Polar Fox delivers comfort, efficiency, and compliance in one compact package.
Polar Fox APU Features
Polar Fox APU is proud to offer the revolutionary electric APU systems for all makes and models of semi trucks. These unique starting lithium battery powered APU systems offer long-last comfort, power on-board appliances, and more!
Most Advanced Lithium Battery
- Dual-purpose lithium starter battery
- Battery withstand extreme cold and hot weather (-40°F to 149°F)
- In-cab power source for all seasons
- Reducing weight from the truck
- Battery auto shut-down to reserve power for starting the truck
- Bluetooth connection to monitor the battery health
- Best quality lithium cells for safty and longavity
- 5-year warranty with 8-10 year service life
All-Night Comfort, Quiet Operation
- Up to 10K BTU for all night cooling
- No idle, quiet operation
- Standard systems get 8-16 hours comfort cooling from a single charge
Affordable Price, Quick ROI
- Affordable price and easy entry to the ownership
- Average ROI is 6-8 months
- Extend engine life
- Reduce DPF maintenance cost
- No/Low maintenance cost
- Saving on the cost of jump start the truck because of the smart starter lithium batteries
- No need to upgrade truck alternator and wiring
Fuel Saving, Environmental Friendly
- Reduce Fuel Consumption
- Fuel saving roughly $10,000 (assuming 8 hours per day, 340 days and 1 gallon per hour)
- Carbon Neutral
Polar Fox Solutions
Whether you’re an over-the-road driver, a fleet with day cabs, or a hands-on DIYer — Polar Fox offers flexible, high-performance APU solutions to meet your unique needs.
Sleeper Cab Solutions
Our flagship sleeper solution provides full 12V/24V air conditioning, heat options, and power for electronics — all supported by the Skana lithium power bank. Ideal for drivers who spend nights on the road and need maximum comfort without engine idling.
Day Cab Solutions
A compact and affordable package tailored for fleets or drivers with day cabs. Keeps your cab cool during downtime, meets anti-idling laws, and helps reduce engine wear — all with minimal install time.
DIY Kit Options
For the mechanically inclined or fleet service teams, our DIY solution includes the core Polar Fox components and guidance for your own custom install. Simple, scalable, and supported with real-time help from our U.S. team.
For Fleet Customers
Got 10 trucks or more? We have special pricing and accomodations for you
Polar Fox APU Fleet Trial Program
Experience the future of truck cooling and power with Polar Fox APU! This summer, we are offering fleets with 50 or more trucks a free testing unit to evaluate our cutting-edge electric APU system.
Polar Fox APU Installations on All Major Truck Brands
See how the Polar Fox APU integrates seamlessly with a variety of truck makes and models. Our flexible, compact design ensures a clean installation without compromising space, performance, or serviceability—no matter what you drive.
Freightliner Cascadia
Peterbilt 579
Freightliner Studio
Super Sleeper
Kenworth
Have Questions? We're Here to Help
Whether you're a fleet manager, an owner-operator, or just exploring electric APU options — our team is ready to answer your questions and help you find the right solution.
Locate Our Dealers
Use our interactive dealer map to locate authorized Polar Fox dealers and installers in your area.
FAQ (Frequently Asked Questions)
An APU (Auxiliary Power Unit) is a device installed on a semi-truck that provides power for heating, cooling, and other electrical needs without running the main engine. Truck APUs help drivers reduce fuel consumption and comply with anti-idling laws by offering an alternative source of power during rest periods. APUs are typically available in diesel or electric configurations.
Diesel APUs have a small diesel engine that powers a generator to provide electricity, HVAC, and sometimes battery charging.
Electric APUs use high-capacity lithium batteries to run HVAC systems and other electronics without fuel.
Key differences:
- Diesel APUs offer longer runtime but require fuel and maintenance.
- Electric APUs are quieter, emission-free, and ideal for fleets looking to reduce idle hours and maintenance costs.
The cost of an APU varies:
- Diesel APU: $8,000–$12,000 installed
- Electric APU: $6,000–$10,000 installed
Price depends on the brand, battery system, features (cooling/heating), and installation complexity. While the initial cost may seem high, APUs often pay for themselves within 12–24 months through fuel and maintenance savings.
Running your truck’s main engine while parked can burn 0.8–1 gallon of diesel per hour. APU systems can cut idling time drastically, saving drivers between $3,000 and $6,000 per year in fuel, depending on usage. Electric APUs provide even more savings by completely eliminating fuel usage during rest time.
Yes, electric APUs are increasingly popular due to lower long-term operating costs, zero emissions, quieter operation, and minimal maintenance. Modern lithium battery systems offer overnight runtimes (8–10 hours or more) and fast charging, making electric APUs a smart investment for drivers focused on efficiency and compliance.
Yes. Most advanced APU systems—both diesel and electric—offer air conditioning and heating solutions. Diesel APUs typically include integrated diesel heaters, while electric APUs often pair with 12V bunk heaters or diesel-fired heaters for cold weather performance.
An APU is not legally required, but many fleets and owner-operators choose to install one to meet anti-idle regulations, especially in states like California, New York, and Illinois, where idling laws are strictly enforced. APUs also improve driver comfort and reduce engine wear from excessive idling.
Professional APU installation takes approximately 6 to 12 hours, depending on the truck model and whether it’s a diesel or electric unit. Some manufacturers offer DIY APU kits for experienced installers looking to save on labor costs.
Most high-quality electric APUs powered by lithium batteries provide 8 to 12 hours of runtime per charge. Runtime can vary based on battery capacity, ambient temperature, and system efficiency. Dual-battery or dual-purpose starting battery setups can extend runtime significantly.
The best APU depends on your needs, but some top-rated APU systems in 2025 include:
- Thermo King TriPac Evolution (Diesel APU)
- Carrier ComfortPro (Diesel APU)
- Polar Fox APU (Electric APU with lithium battery system)
Polar Fox APU, for example, stands out in the electric APU market for its simple design, lithium power, and ease of installation.
