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Long-Haul Truckers Save Fuel with Lithium APU Batteries

Long-Haul Truckers Save Fuel with Lithium APU Batteries

Your truck’s electric APU is designed to cut fuel costs and idle time and increase the comfort of your sleeper cab. But does it always live up to expectations? Many of the limitations of electric APUs come from using lead-acid or AGM batteries. Lead-acid batteries are effective as starter batteries, providing short, large bursts of energy. They are less suited to deep-cycle applications like electric APUs, which need a steady, consistent current to run appliances and electronics. By upgrading your house (hotel) battery bank from lead-acid batteries to lithium ones like our new LightningVolt™, you could see long-term savings and significantly improved performance. You can find out more about the differences between the two batteries here

So, how can switching to lithium batteries improve your fuel economy?

Cut Down on Idle Time

 Long-haul truckers used to idle their engines for extended periods to power their electronics without running down the starter battery. However, as idling is the lowest-duty cycle, it rapidly clogs up your DPF, leading to unnecessary active and forced regens, and more time stuck on the side of the road. This is also a very inefficient method of powering your hotel load accessories. Your main engine has to pull the entire weight of your truck and any chassis-mounted accessories. This means that it burns an enormous amount of fuel—far more than you need to run your electronics.


Idling an engine for an extended period dramatically drives up your fuel costs. In one hour, an idling truck can burn through a gallon (3.8 litres) of fuel. That means that every hour of idling costs you on average $4.00 USD or $5.32 CAD. This adds up quickly the longer you idle, with 10 hours of idling setting you back $40 USD or $53.00 CAD. Over a year, with 250–300 nights on the road, this can come to $10,000–$12,000 USD or $13,250–$15,900 CAD. This kind of expense over ten years is just one of the reasons that investing in an electric APU with high-performance batteries can save you money, fuel and hassle. This is where LightningVolt™ lithium batteries come in! With a 10× longer lifespan, 1 LightningVolt™ battery saves you from replacing 10 traditional AGM batteries.

Electric APU as Idle Reduction Technology

In an effort to reduce air pollution, officials introduced limited-idle or no-idle regulations in much of North America. Keeping on top of the different regulations as you drive through the country can be tricky! You can see a full map of US state idling regulations here. These regulations are also in place at loading zones and truck stops, where many trucks gather. This is sometimes inconvenient for long-haul truckers, but the reasons behind it are in drivers’ interests. The HVAC system, which provides trucks with heating and air-conditioning, draws ambient air into the sleeper cab. If there are trucks idling in the area, the HVAC system will draw diesel fumes into the sleeper cab, which is unpleasant and bad for the driver’s health.


Due to these regulations, many modern trucks were not built to handle long idle times. Idling a modern commercial truck for extended periods can cause extra wear and tear to your engine and aftertreatment system, significantly decreasing their service windows. In fact, according to estimates from the American Trucking Association, idling can cause twice the wear and damage to engine parts that normal driving causes. On top of this, aftertreatment parts are not normally designed to handle extended low-duty cycles, and idling is the lowest-duty cycle.


These factors make idle reduction systems like electric APUs an attractive option to drivers and fleet owner-operators. An eAPU lets you use your electronics, appliances and temperature control systems, without idling while stationary. This is especially important during mid-summer and mid-winter when temperature extremes drive up trucking costs. By running an electric APU on LightningVolt™ lithium batteries, long-haul truckers get the most from their sleeper cab, and operators avoid excessive idling costs.

Reduce Unnecessary Engine Starts

A battery-powered eAPU is a quiet, efficient way to run essential electronics and appliances while on the road. However, many drivers find that their electric APU’s battery power isn’t nearly enough to last 8 hours running appliances and an HVAC system. A large part of this is down to running a high-load system on inefficient AGM batteries.

By upgrading to lithium batteries, you can get more use from your auxiliary system and run higher-draw appliances. LightningVolt™ doubles the run-time between charges and offers twice the usable power of an AGM battery due to greater depth of discharge. This means you don’t have to start your engine to recharge during long breaks or overnight, saving you fuel. With more charge cycles, a battery like LightningVolt™ also lasts 10× longer than lead-acid alternatives.

For added value, our LightningVolt™ batteries include a management system to extend their working life and optimize performance. The in-built safety feature protects against overcharging, and overcurrent, and lets the battery reach maximum discharge depth without being damaged.

Maintain Performance Levels During Temperature Extremes

We build our LightningVolt™ lithium batteries in Canada and design them to withstand the extremes of Canadian weather and terrain. They maintain considerably higher rates of charge than traditional batteries, even below freezing. This cuts fuel costs by allowing you to run your batteries in extreme cold, without having to turn the engine on to charge them. You can charge them in temperatures as low as -4F, but charging speeds decrease below freezing to protect the battery. After 15–30 minutes of running a moderate load, the batteries will warm up enough to charge at normal rates. If you want to increase your runtime or boost your voltage for higher-draw appliances, you can also connect LightningVolt™ batteries in parallel, or up to four in series.

To find out more about LightningVolt™ and how it can lower your fuel costs, check out our auxiliary power blog. You can also head to our website or contact a member of the team to learn how LightningVolt™ can benefit your truck.



Better Coating, Better Performance.

Roadwarrior is the only manufacturer to use Metalcor® catalyst technology across its entire range of Diesel Oxidation Catalysts (DOCs) and Selective Catalytic Reduction catalysts (SCRs). Metalcor® catalysts feature high activity catalyst coatings fused to thinner, stronger, catalyst substrates to guarantee maximum performance under the harshest conditions.

Metalcor® catalyst coatings are designed and produced in our own labs. We then inspect each unit to ensure you get more fuel efficiency, lower consumption of DEF, and long term performance from your heavy duty engine!


Roadwarrior Has You Covered!

All Roadwarrior emissions parts carry a full value 12 month warranty.

LightningVolt lithium batteries carry a full value 30 month warranty.

To make the process hassle-free, our parts have a metal nameplate with the serial number, so even after 500,000 miles of service, it’s still easy to identify. This avoids the common problem of serial numbers printed on stickers that burn off after the first start-up, making them impossible to return. Our failsafe system allows us to work in your interests, honouring claims for on-road and off-road replacements, and giving you peace of mind.

And since Roadwarrior parts are designed to meet or exceed OEM specifications, you can rest easy knowing our direct fit parts will take the problems out of your aftertreatment without interfering with your OEM warranty.

Next Day Is Nice, Same Day is Better!​

A faulty emissions control system can cost you thousands in wasted man-hours as your heavy equipment sits in the shop awaiting a new part. Whether it’s a truck behind on orders, a bus that can’t take passengers, or heavy machinery delaying construction deadlines, Roadwarrior can get you moving again! 

Roadwarrior has twelve warehouses across the U.S.A. and Canada, which can deliver the most popular aftertreatment parts in 1-2 days. With over 1,000 DPFs, DOCs and SCRs on offer, Roadwarrior offers the largest aftertreatment catalogue.

*LightningVolt lithium batteries ship directly from Roadwarrior in Ontario, to ALL 50 states, including Alaska and Hawaii within 2-4 days.