Why the 4500W
Our most powerful generator.
Big power, long run times and wheels to move it. Made for big caravans, home backup and the job site.
4000WRunning power
Big power
Run the aircon and more.
On a hot night, the aircon is only the start. You get 4000W of steady running power and two AC outlets, so you can run selected caravan air conditioners with other appliances, like the fridge or the coffee machine.
10 hrsFrom, on a 12 L tank
Home backup
Ready for the next blackout.
When a storm knocks the power out, you want something that keeps going. The 12 L tank runs from 10 hours, and the two AC outlets keep the fridge, freezer, lights and phone chargers going.
Made for
Made for bigger jobs.
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Big vans
Power for the big van
Run selected caravan aircons with other appliances at the same time.
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Home backup
Keep the house going
Run several essentials in a blackout: fridge, freezer, lights and phones.
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Job sites
Power for the tools
Two AC outlets run power tools and chargers on clean, stable power.
Promac 4500W vs Others
Feature
Promac 4500W
Others
Power
Pure sine. Laptop & phone safe
Not always electronics-safe
Run time
From 10 hrs on a 12 L tank
Full throttle burns more fuel
Noise
From 53 dB(A). Quiet for its size
Loud, full-speed engine
Moving it
Wheel & handle kit included
Often a heavy frame to lift
Start
Electric start, battery included
Often pull-start only
Warranty
3-year engine warranty, local parts
Varies by brand
"Others" means a typical open-frame generator. Features vary by brand.
40 kgOn wheels
Easy to move
Big power that rolls.
A generator this big is heavy, at 40 kg. That is why it comes with a wheel and handle kit. Lift the handle and it tips back onto its wheels, so you can roll it to the van, the shed or the job site.
2 × ACPlus USB & 12V
Clean power
Two outlets. Clean power.
Plug in two leads at once. Both AC outlets give pure sine wave power, so they are safe for laptops, phones and other sensitive gear. There are USB and 12V outlets as well.
Good to know
Questions people ask
Will it run my caravan air conditioner?
It runs selected caravan air conditioners, with 4000W of running power. That leaves room to run other appliances at the same time, like the fridge or the microwave.
How long does it run on a tank?
From 10 hours on the 12 L tank. Run time depends on how much you plug in. The inverter slows the engine on lighter loads, which saves fuel.
Is it heavy to move?
It weighs 40 kg, so it comes with a wheel and handle kit. Roll it on its wheels. Use two people to lift it into a ute or trailer.
How do I start it?
The Quickstart guide that comes with each unit will walk you through getting your generator started. First add oil, add fuel and turn on the choke. Then use the electric start. The battery comes in the box.
Can I use it to power my home in a blackout?
Yes, for several essentials at once, like the fridge, freezer, lights and phone chargers. Plug them in with heavy-duty outdoor extension leads. Never connect a generator to your home wiring unless a licensed electrician has installed an approved connection. Always run it outdoors, away from doors and windows.
Is it quiet?
It runs from 53 dB(A) at 7 metres, which is quiet for a generator this size. Always check the rules for generator hours at caravan parks and campsites.
What warranty do I get?
3 years on the Macht engine, with warranty agents and spare parts across Australia. Promac is Australian-owned and has been family-run since 1981. We are based in Beerwah, Queensland.
How do I look after it?
Follow the service schedule in the manual. Promac sells a Generator Service Kit and 1L engine oil to keep it running well.
Can I see one in a store?
Yes. Use the store locator to find a Promac stockist near you.
Compare the range
Which Promac generator is right for you?
The Camping Companion
2000W Inverter Generator
$995.00
Best for lightweight, portable power
View the 2000WHeading off for a weekend? This light, easy-to-carry unit runs portable fridges, LED lights and device charging, with 1,800W running power at 18.5 kg.
- Most popular
The All-Rounder
3300W Inverter Generator
$1,395.00
Best for caravanning and everyday power
View the 3300WA great all-rounder for the van. It handles selected caravan appliances, coffee machines and light trade jobs, with 3,000W running power and push-button start.
- You're viewing
The Powerhouse
4500W Inverter Generator
$1,945.00
Best for higher power needs
You're viewing this oneFor bigger setups. It powers larger caravans, selected air conditioners and onsite gear, or several essentials in a blackout. 4,000W running power, plus a wheel and handle kit.
Compare full specs
| Specification | 2000W | 3300WMost popular | 4500W |
|---|---|---|---|
| Running (rated) outputRun power | 1,800W | 3,000W | 4,000W |
| Starting outputStart power | 2,000W | 3,300W | 4,500W |
| WeightWeight | 18.5 kg | 23 kg | 40 kg |
| Size (L × W × H, mm)Size (mm) | 480 × 285 × 460 | 500 × 305 × 500 | 595 × 440 × 515 |
| Wheel & handle kitWheel kit | No | No | Yes |
| Noise at 7 mNoise | From 52 dB(A) | From 54 dB(A) | From 53 dB(A) |
| Fuel tankFuel tank | 4 L | 7 L | 12 L |
| Run timeRun time | 6 hrs at 50% load | From 6 hrs | From 10 hrs |
| Start systemStart type | Recoil | Electric + recoil | Electric |
| AC power outletsAC outlets | 1 | 1 | 2 |
| USB & 12V outletsUSB/12V | Dual USB + 12V | Dual USB + 12V | Dual USB + 12V |
| Digital displayDisplay | Yes | Yes | Yes |
| Macht engine warrantyWarranty | 3 years | 3 years | 3 years |
