EPU Truck Systems – Truck EPU Retrofit Solutions
Stop Idling. Start Saving. Upgrade Your Fleet With a Smarter Power System. Our EPU retrofit solutions deliver longer runtime, lower maintenance, and instant ROI for fleets of every size.
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832-990-0672
01.
10,000 BTU Cooling
02.
3.5 kW Heating
03.
Low Power Consumption
Idling All Night Is Draining Your Bottom Line
Drivers need reliable rest, but running the engine for heating or cooling is the most expensive solution possible. Overnight idling burns fuel, accelerates wear, and exposes fleets to unnecessary compliance risks.
Engine idling leads to:
- Massive fuel loss — Up to $10,000 per truck per year
- Stress on emissions systems (DPFs, DEF consumption, regen cycles)
- Higher maintenance costs from oil changes, clogged filters, and excess soot
- Fines in anti-idle regions and unnecessary regulatory headaches
Financing Made Easy — 0% Down, Instant Approval, Maximum Savings
Upgrade without the financial stress. Our system is engineered to pay for itself, and our financing options make the decision even easier.
$0 Down. Apply in Minutes.
Start with no upfront cost. Apply through our finance arm instantly — approvals are fast, simple, and built for fleet operators and owner-operators.
Low Monthly Payments That Beat Your Fuel Savings
Most customers see monthly payments lower than the amount they save by eliminating idling. That means your retrofit doesn’t just save money — it pays for itself from the first month.
The Most Cost-Effective Upgrade Your Truck Will Ever Get
Stop burning cash on fuel and downtime. This retrofit becomes a net financial gain, not an expense. That’s why fleets call it the highest-ROI upgrade they’ve ever added to their trucks.
Apply for Financing Anytime
We’ve placed application links throughout the site so you can apply wherever you are in the buying journey.
Ready to get approved now?
Apply through our finance arm in under 60 seconds.
The Truck Systems EPU Retrofit
A complete battery-powered HVAC system that eliminates overnight idling — permanently.
Our retrofit delivers consistent heating and cooling powered by a high-capacity energy unit installed directly into the truck. No idling. No compromises.
Core Advantages
- High-capacity 7.5 kWh battery system (Not enough power no problem we can help)
- Up to 50amp of power consumption
- 35+ hours of heating*
- 20+ hours of air-conditioning*
- Fully automatic operation
- Zero scheduled maintenance required
- Charges while the truck is running — no driver action needed
- Lower emissions and a smaller carbon footprint
- Less strain on the engine and emissions systems
What We Install
How the Retrofit Works
The EPU installation process is clean, modular, and fast — typically 4–6 hours. This retrofit is built around very few components and is designed to occupy no chassis space at all. The only exterior part is the condenser mounted on the back of the sleeper — every other component is installed inside the truck, protected and out of the airflow.
Battery Pack
Mounted securely under the sleeper bunk Mounted inside the sleeper compartment. It powers the HVAC system during rest periods and connects directly to the internal control module.
Integrated HVAC Unit
A compact heating and cooling unit installed inside the cab/sleeper. It handles all climate control without requiring any under-chassis equipment.
Charging Interface
Connected to the truck’s alternator so the battery pack recharges automatically while driving, ensuring consistent off-engine operation without manual steps.
Track Every Dollar Saved With Fleet Performance Software
Our integrated monitoring platform gives fleet managers total visibility:
- Fuel savings tracking
- Idle-time reduction reports
- Real-time battery health
- GPS-based performance data
- Complete operational history logs
Perfect Climate Control Solutions Designed for a Wide Range of Vehicles, Industries, and Harsh Operating Environments
Already Have an APU or EPU? Boost It With the EPU Runtime Extender
We can use our technology with most APU and EPU systems for a fraction of the cost increasing ROI.
Extender Highlights
- Same 7.5 kWh LiFePO₄ battery
- 60+ hours of heat and 25+ hours of A/C added runtime*
- Stops engine auto-starts entirely
- Fully automatic
- Installs without tapping into the truck’s ECU or power circuits
- Completely removable
Ready for Premium Vehicle Climate Control?
Upgrade your fleet with a smarter, cleaner, and more cost-efficient power system.
Backed by the Best Warranty in the Industry
Backed by the strongest warranty on the market.
We stand behind every component — no games, no fine print.
Your investment is protected from day one.
Download Specs & Fleet Materials
Share with your team or executives.
Download our full Spec Sheet, Technical Overview, and Promotional Flyers in one click:
- Product Specification Sheet (PDF)
- Fleet & Executive Overview (PDF)
- Promotional Flyer (PDF)
Frequently Asked Questions
Yes — real-time data, alerts, GPS tracking, and historical logs are included.
Yes. Alerts can be enabled for battery health, runtime limits, and critical EPU events.
- The Retrofit provides a full HVAC + battery system.
- The Extender expands runtime for trucks that already have an OEM or aftermarket EPU.
Typically 20+ hours, depending on usage and conditions.
Yes — it automatically charges from the truck’s alternator.
- The Retrofit may require small venting modifications for optimal airflow.
- The Extender installs with no cutting and is fully removable.
Both solutions are designed for fast, maintainable installation for fleets and owner-operators.
Yes — it qualifies as an IRT solution, helping fleets meet regulatory requirements and reduce emissions.
Reduced fuel burn, lower maintenance, less engine wear, and fewer compliance penalties.
Most fleets see a full return in 12–18 months, often faster depending on driver hours and operating region.
Yes — all systems come with a manufacturer-backed warranty.
We’re Here to Help
Have questions about our 24V AC & Heating Systems, installation, pricing, or fleet solutions?
Phone: 832-990-0672
Email: ken@energystoreconsulting.com
Support Hours: CORPORATE HEADQUARTERS
6723 Theall Road, STE C-2
Houston TX 77066