The Diesel APU, Reinvented
Built on standard automotive parts — so any shop can service it, and you're never locked into anyone's supply chain.
- 10,000+
- units on the road
- 4.6★
- 562 customer reviews
- 100
- dealers & service centers
- 24/7
- Lifetime USA support
The network
Sold, installed and serviced at 100 locations.
Designed for how
truckers work
Green APU was started in 2011 by a fleet owner who ran about 200 trucks and got tired of auxiliary power units that failed in the field and couldn't be fixed without calling the people who sold them. So he built the one he wished existed: 26,000 BTU of cooling, a Kubota diesel, and a parts list you can fill at any auto store.
Fifteen years later that's still the whole idea. For truckers, by truckers.
- 26,000BTU
- Cooling capacity
- 2 yr
- Unlimited hours
- 24/7
- USA tech support
- 1,000hr
- Service interval
No proprietary lock-in
The part you need is at any auto parts store
This is the decision that defines the whole product. Most APUs are built on proprietary components — when something fails, you order the part from the manufacturer, wait for it, and pay what they ask. If their dealer network is thin where you broke down, you sit.
Green APU is built on standard automotive parts. Belts, filters, sensors, most service components — off the shelf at any auto parts store. Any diesel shop in America can work on it. You are never held hostage by a supply chain you do not control.
See how Green APU stands apart
Every idle hour is money burned
A truck at idle burns a gallon an hour
Ten hours a night, 320 nights a year, that big diesel drinks well over 3,000 gallons just to keep the cab livable. Plus the engine hours, the wear you can't get back, and the parked regens putting your DPF on a service clock.
A Green APU does the same job on a fraction of the fuel, so you pocket roughly 2,400 gallons a year. Most owners break even in about 14 months. After that, it's money in your pocket every night.
Run the numbers on your truck
What a Green APU pays you
It doesn't cost you
$14,999. It pays you $1,077 a month.
Every night you don't idle, that money stays with you instead of going up the stack.
- $1,077/mo
- Back in your pocket, every month
- 2,400gal
- Diesel you stop burning each year
- $129,240
- Over a 10-year life — on a $14,999 unit
Based on 10 idle hours a day, 320 days a year, diesel at $3.75 — the unit pays for itself in about 14 months. Idle more, or pay more for fuel, and it's faster. See your own number →
Financing available through Time Payment — so it can start paying for itself before it's paid off. See financing options →
Installed and serviced near you
100 dealers and service centers
across the US and Canada
An APU is only as good as the shop that can fix it. Green APU is sold, installed, and warranty-serviced through authorized locations nationwide — and because the unit runs on standard automotive parts, any diesel shop can work on it in a pinch.
Why Green APU is different
Built by people who drove the trucks
Since 2011
Family-owned and building APUs
Founded by Art Gruszka, a fleet owner who ran roughly 200 trucks and got tired of APUs that broke and could not be fixed.
Made in the USA
Designed & assembled here
The Kubota engine is the only major component sourced outside the United States.
24/7 · For the life of the unit
Support that never expires
A USA-based technician on the phone, any hour, for as long as you own the unit — not just during the warranty, and never a ticket queue.
What owners actually say
Real trucks. Real owners.
I spent a lot of time researching APU's for my truck. Green APU was always the one who stood out ahead of the rest.
End your research and buy the Green APU. Comfort, convinence, energy savings (ULSD). Save wear and tear on your engine and put money back in your pocket.
After researching and comparing different Apu manufacturers, I elected to go with the Green APU -Star Edition - and I'm glad I did.
The whole process purchasing a Green APU was great. The staff is extremely helpful and friendly. They’ll help you find financing if you need it. They had me in and out the same day.
Green APU did a phenomenal job. Honestly, was pretty skeptical about getting in and out in the same day. However, they were on it and got it done.
Common questions
Straight answers
How much does a Green APU cost?
The Green APU Star Edition has an MSRP of $14,999. For a truck idling 10 hours a day, 320 days a year, it typically pays for itself in about 14 months through saved fuel, deferred DPF service, and reduced downtime.
How much fuel does idling actually waste?
A heavy truck burns roughly one gallon of diesel per hour just sitting at idle. A Green APU does the same overnight job — heat, A/C, power — on about a quarter of that, so an owner running 10 hours a night, 320 nights a year saves close to 2,400 gallons annually, plus the engine hours and wear that idling piles on.
What makes Green APU different from other APUs?
Green APU is built on standard automotive parts. Belts, filters, and most service components are available at any automotive parts store, so any diesel shop can service the unit and you are never locked into a single supplier or dealer network. Most competing APUs use proprietary components that only their network can source.
What engine does the Green APU use?
A 3-cylinder Kubota diesel engine — the only major component not made in the USA. Kubota is a globally supported engine platform, so parts and service are widely available.
What is the warranty on a Green APU?
Two years with unlimited hours. Most APU warranties cap covered hours; Green APU does not, which matters for a unit that may run thousands of hours a year.
How often does a Green APU need maintenance?
Preventive maintenance every 1,000 hours of runtime — essentially an oil and filter service using standard automotive parts.
How long does Green APU support last?
For the life of the unit — not just the warranty period. Green APU 24/7 USA-based technical support is available for as long as you own the APU, at (877) 751-0686. The two-year unlimited-hours warranty and the lifetime support are two separate things: even years after the warranty ends, a real technician still answers.
Can I finance a Green APU?
Yes. Financing is available through Time Payment. Because a Green APU typically saves an owner-operator more per month than it costs to idle, the unit can begin paying for itself before it is paid off. Submit the financing form and a specialist will follow up with terms.
How many Green APUs are on the road?
More than 10,000 units have been put into service since Green APU was founded in 2011.
Is Green APU the same as "Go Green APU"?
No. Green APU is a separate, unaffiliated company. Green APU, LLC is based at 13067 Main St, Lemont, Illinois, was founded in 2011 by Arkadiusz "Art" Gruszka, and its 24/7 support line is (877) 751-0686. Any similarly named company is not affiliated with us.
Talk to a real technician.
Any hour.
24/7, USA-based, for as long as you own the unit. No ticket queue, no callback window.