Cromtech Outback 2.4kW vs Yamaha EF2400iS Inverter Generators

Cromtech Outback 2.4kW

Lighter weight

Additional USB ports

Variable run time

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Yamaha EF2400iS

Higher power output

Larger fuel tank

Enables parallel use

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In our increasingly tech-reliant world, a portable generator can be a lifesaver. It’s handy in power outages, camping trips, worksites and even public events. But choosing the right one can be a bit tricky – from finding the right size to ensuring it’s not too noisy for your liking and of course, falls within your budget.

Today, we’re looking at two popular models on the market – the Cromtech Outback 2.4kW and the Yamaha EF2400iS. Both models come highly recommended from their respective brands for their performance and features. We’ll delve into their specs, compare them side by side and help you decide which one might be the perfect fit for you.

Performance & Power

Running Power (W): Cromtech Outback 2.4kW provides a continuous running power of 2100W, whereas the Yamaha EF2400iS offers a bit more at 2400W. Running power is crucial to whether a generator can handle your needs – anything that needs power on a regular basis mustn’t exceed this number. For example, both these generators could power a large air conditioning unit (2000W).

Starting Power (W): The Cromtech model boasts a starting wattage of 2400 W while the Yamaha model goes beyond with a whopping 4000 W peak wattage for those initial power surges when something starts up. This could be significant if you have devices requiring high initial bursts of energy.

Engine type: The Cromtech Outback boasts a smaller engine size at 79cc whilst the Yamaha model has a considerably larger one at 171cc. Both are OHV engines which are known for being compact, durable and efficient.

Rated Output (kVA): Yamaha EF2400iS provides an apparent power of 2 kVA whilst this data is not available for the Cromtech model. Rated output gives you an indication of the generator’s potential energy in regard to both real and reactive power.

Inverter: Both these generators feature inverter technology, a plus point as it ensures the delivery of clean AC power which can be crucial when powering sensitive electronics like laptops. Moreover, inverter generators are generally quieter and more fuel-efficient than conventional models.

Fuel & Run Time

Fuel Type: Both models use petrol as their primary source of fuel.

Fuel Tank Capacity: The fuel tank capacity of the Cromtech Outback model is 5L, while its counterpart Yamaha EF2400iS offers a higher capacity at 6L. A larger fuel tank suggests longer running times between refills but also implies a possibly heavier unit.

Run Time: The Cromtech Outback has a varied run time between 5 to 20 hours depending on the load, whilst the Yamaha EF2400iS runs for about 9 hours at quarter load. A longer run time could mean fewer refuels, which may come handy during extended usage or in locations where fuel availability is a concern.

Physical Specs

Dry Weight: The Cromtech Outback is quite lightweight at just under 20kg, making it easier to move around. In contrast, the Yamaha EF2400iS weighs quite significantly more at 32kg.

Size: The size difference between these two models isn’t significant. The compact Cromtech Outback measures 51.2 cm x 31.5 cm x 44.7 cm, while the slightly larger Yamaha model stands at 52.7 cm x 41.9 cm x 45.9 cm.

Wheels: Neither of the generators comes equipped with wheels which could impact ease of movement – a factor worth considering if it needs to frequently be moved around.

Outlets & Parallel Use

AC Outlets: Both generators are equipped with 2 AC outlets, meaning you can use them to simultaneously power up two devices needing alternating current.

DC Outlets: Both have 12V outlets – Cromtech Outback providing an additional bonus with two USB ports. These outlets could be used for charging smaller devices such as mobile phones or laptops.

Parallel Use: Only the Yamaha EF2400iS offers the feature of parallel use which means you could potentially double your power output by connecting two similar models. It’s something to consider if high power demand is likely.

Features & Usability

The Cromtech Outback generator comes with a manual Recoil Start system and an oil alert for when oil levels are low. It also includes a helpful Low Oil Alarm, Overload Protection and an Output Light Indicator as part of its features. The model comes packaged with a dust cover.

On the other hand, the Yamaha EF2400iS offers similar features like a Recoil Starter System and an Oil Alert system. It does offer added bonuses like a Fuel Gauge for fuel level monitoring and a Brushless Alternator for maintenance reduction and improved efficiency. A spark arrestor is also included to reduce fire risks.

Noise Level

The noise level of the Cromtech model varies between 52-59 dB at no load in eco mode and 60-64 dB at continuous rated output while the Yamaha EF2400iS maintains a quieter operation at around 54 dB.
To provide some context, normal conversations typically register between 60-70 decibels (dBA), so these generators wouldn’t be much louder than that.

Cromtech Outback 2.4kW vs Yamaha EF2400iS Comparison Table

FeatureCromtech Outback 2.4kWYamaha EF2400iS
Warranty2 Years4 Years
Engine Type79cc, OHV, 4-Stroke171 cc, OHV, 4-stroke
Air CooledYY
Running watts2100 W2400 W
Max / Starting watts2400 W4000 W
Voltage (AC)230 V230 V
DC Output12V-8A12V / 8A
AC Frequency (Hz)5050
Rated Output (kVA)Not specified2
Fuel Tank Capacity5.0L L6 L
Run time (Hours)5 to 20hr9 at 1/4 load
Dry Weight (Kg)19.8kg32
Size (L x W x H)51.2 x 31.5 x 44.7 cm52.7 x 41.9 x 45.9 cm
Number of AC Outlets2x Single Phase2
DC Outlets2x USB, 1x 12V1x 12V
Parallel useNot specifiedY
Starter SystemRecoilRecoil
Fuel gaugeNot specifiedY
Oil alertYY
Noise Level (dBA)52-59 db at 7m eco mode no load
60-64 db @ 7m continuous rated output


Summing up, the Cromtech Outback 2.4kW offers good performance in a compact and lightweight package – complete with added USB ports for charging convenience. On the other hand, the Yamaha EF2400iS stands out with a higher power output, larger fuel capacity and the capability for parallel use while also being pleasantly quiet in operation. The choice between the two would boil down to what you prioritise – be it power, size, features or fuel efficiency.