Cromtech Outback 4.5kW vs Yamaha EF3000iSE Inverter Generators

Cromtech Outback 4.5kW

Higher running power

Higher starting power

Lighter weight

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Yamaha EF3000iSE

Larger fuel tank

Quieter operation

Wheels for mobility

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Whether you’re dealing with a power outage at home, running multiple high-powered tools on a construction site, providing electricity for a food truck or coffee van, or supporting an outdoor event with lighting and sound, a robust portable generator becomes indispensable. But the process of deciding which one to buy can be somewhat overwhelming. You have to consider factors like the right size, noise level, and cost – all of which can make the decision tricky.

In this comparison guide, we’re pitting the Cromtech Outback 4.5kW against the Yamaha EF3000iSE to assist you in making an informed selection. Both models boast some impressive features and specifications as their selling points – but how do they fare when compared side-by-side? Let’s find out.

Performance & Power

Running Power (W): The Cromtech Outback provides 3700W, whereas the Yamaha EF3000iSE offers 3000W of continuous power. For context, continuous or running power is how much electrical juice a generator can steadily provide without faltering – your appliances’ power demand should never exceed this value to avoid overloading. For instance, Cromtech’s model could sustain appliances like water heaters and industrial vacuum cleaners that consume around 3000W each.

Starting Power (W): Devices with motors may require a higher initial surge of energy on startup – so there’s no harm in making sure your generator can deal with these short bursts of power demand. The Cromtech model offers 4500 starting watts, while the Yamaha model is close behind with 4000 watts.

Engine Type: While both machines run on petrol fuel types, their engine sizes vary significantly – the Cromtech clocks in at a 212 cc capacity; the Yamaha engine has a smaller capacity of 171 cc. Considering that both engines are OHV, or Overhead Valve, the models promise a longer lifespan, better fuel efficiency, and improved power output.

Rated Output (kVA): Yamaha offers a rated output of 2.8 kVA. Regrettably, we don’t have the necessary numbers for the Cromtech model. In essence, a kVA rating is a testament to the generator’s total available power – after all, certain high-draw devices could require more than just wattage to operate effectively.

Inverter: Good news! Both generators come with inverter technology, giving you cleaner and safer power for sensitive electronics like laptops or mobile phones. Plus, these units tend to be quieter and more fuel-efficient.

Fuel & Run Time

Fuel Type: Both models are petrol-based machines.

Fuel Tank Capacity: A bigger fuel tank usually translates into less frequent refills at the cost of added weight and size. The Yamaha EF3000iSE trumps the Cromtech’s 7 litres with its generous 13-litre fuel tank.

Run Time: Here they diverge even further – while the Cromtech can operate from four to twelve hours depending on the load, Yamaha takes home the trophy with up to 20.5 hours run time at a quarter load. This could mean less refuelling interruptions during extended use.

Physical Specs

Dry Weight: Weighing at just 37.7 kilograms, the Cromtech generator proves lighter than its Yamaha competitor tipping the scales at 67 kilograms – this could make transport and manoeuvrability easier.

Size: When it comes to dimensions or space demand, Cromtech’s model measures up at smaller dimensions of 58 cm length by 45.3 width and height of 48.1 cm compared to Yamaha’s bulkier configuration—68cm by 44.5cm by 55.5cm.

Wheels: The Yamaha EF3000iSE model comes with wheels, making portability much easier – unfortunately, we don’t have a definitive answer about Cromtech’s wheel availability.

Outlets & Parallel Use

AC Outlets: Both generators are equipped with two AC outlets for plugging in a variety of appliances and tools simultaneously.

DC Outlets: The Cromtech model has USB and DC outputs (12V-8.0AMP), while the Yamaha only sports a single 12V DC outlet – this could affect what devices you can power using each machine.

Parallel Use: While we can’t confirm about Cromtech’s compatibility, Yamaha doesn’t offer the ability to be run in parallel.

Features & Usability

From an ease-of-use perspective,

  • Both models have an oil alert system
  • The Cromtech offers additional features like digital display indicators and an overload alarm, whereas its competitor does not.
  • In terms of starting systems, Cromtech offers more flexibility with remote, electric, and recoil options. In contrast, Yamaha opts for the traditional Recoil/Electric setup.

Noise Level

Operating noise levels clock in at around 55-60 decibels for Cromtech and even lesser at 51 decibels for Yamaha—a bit louder than your household refrigerator (55dBA) but quieter than city traffic (85 dBA).

Cromtech Outback 4.5kW vs Yamaha EF3000iSE Comparison Table

FeatureCromtech Outback 4.5kWYamaha EF3000iSE
Warranty1 Years4 Years
Engine Type212 cc171 cc, OHV, 4-stroke
Air CooledNot specifiedY
Running watts3700 W3000 W
Max / Starting watts4500 W4000 W
Voltage (AC)230 V230 V
DC Output12V, 8.0AMP12V / 8A
AC Frequency (Hz)5050
Rated Output (kVA)Not specified2.8
Fuel Tank Capacity7 L13 L
Run time (Hours)Four to 12 hours (depends on load)20.5 at 1/4 load
Dry Weight (Kg)37.767
Size (L x W x H)58 x 45.3 x 48.1 cm68.0 x 44.5 x 55.5 cm
WheelsNot specifiedY
Number of AC Outlets2 x outlets (15 AMP – IP44)2
DC OutletsUSB 5V – 2AMP, DC 12V – 8.0AMP1x 12V
Parallel useNot specifiedN
Starter SystemRemote / Electric / RecoilRecoil/Electric
Fuel gaugeNot specifiedY
Oil alertYY
Noise Level (dBA)55-6051


In conclusion, if you’re seeking more power efficiency or longer run times, Cromtech’s Outback 4.5kW might fit the ticket better. However, if smaller footprint, higher fuel capacity or quieter operations are crucial to you—Yamaha’s EF3000iSE could be your go-to option.

Remember that the decision ultimately rests on your unique needs and how well these generators align with them.