Engel R2500IS vs Yamaha EF2400iS Inverter Generators

Engel R2500IS

Less expensive

Lighter weight

Comes with USB outlets

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Yamaha EF2400iS

Quieter operation

Higher starting power

Longer run time

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Portable generators are handy devices that provide temporary electrical power. This might be for camping, backyard parties or as a backup during an unexpected power outage. However, choosing the right one can be like walking through a maze. You have to consider the generator’s size, how loud it is, and whether it fits within your budget.

To help you on this journey, we are comparing two models: The Engel R2500IS and the Yamaha EF2400iS. These generators stand out because of their key selling points. The Engel R2500IS is marketed as affordable with a good warranty and service network, while the Yamaha EF2400iS is touted for its quiet operation, more power and lightweight design. In this comparison, we’ll look at relevant specifications such as power output, fuel efficiency, possible uses and noise level.

Performance & Power

Running Power (W): Engel R2500IS provides 2500 watts of running power while Yamaha EF2400iS delivers 2400 watts. This fact means that either generator could comfortably run a large Air Conditioning unit or an air compressor – both rated at 2200 watts.

Starting Power (W): Here we see a significant difference. The Engel R2500IS has a matching 2500 watts running and starting power. On the other hand, Yamaha EF2400iS offers an impressive 4000 watts start-up power providing sufficient initial kick for gadgets with larger motors.

Engine type: Both generators feature OHV (Overhead Valve) Engines known for their durability and improved power output. The Engel R2500IS has a smaller 122cc engine compared to the larger Yamaha’s 171cc offering.

Rated Output (kVA): kVA stands for kilo-volt-amperes, which is a measure of electrical power. The Engel R2500IS is rated at 2.5kVA while the Yamaha EF2400iS is rated slightly lower at 2kVA.

Inverter: Thankfully, both generators come with an inverter technology offering cleaner power necessary for sensitive electronics like laptops and smartphones. It also makes the generators quieter and more fuel-efficient.

Fuel & Run Time

Both models use petrol, a readily available and convenient fuel source.

Despite having a smaller fuel tank capacity (4.5L vs 6L), the Engel R2500IS’s running time falls short compared to Yamaha EF2400iS. At full load, it operates for 3 hours, whereas the Yamaha delivers up to 9 hours at quarter load. Longer run times are ideal for extended periods of use without refuelling.

Physical Specs

The Engel R2500IS weighs less at 23.5 kg making it easier to carry around compared to the slightly heavier Yamaha EF2400iS weighing in at 32 kg.

Their size dimensions are almost similar with Engel being marginally smaller but neither generator comes equipped with wheels, possibly affecting easy movement.

Outlets & Parallel Use

Engel R2500IS offers one AC outlet while the Yamaha has two AC outlets— handy when you need to plug multiple devices simultaneously. DC outlets types differ between models: Engel includes USB ports suitable for charging small devices, whereas, Yamaha gives an traditional 12V outlet.

Are you looking at doing heavy-duty work? Both generators can run in parallel effectively doubling your power output—a highly valuable feature in instances where more power is needed.

Features & Usability

The Engel R2500IS comes with the basic recoil start system offering simplicity but may require effort to operate. Luckily, there’s overload protection ensuring safer operation. Unfortunately, oil alert and brushless alternator features are unavailable in this model.

In contrast, Yamaha EF2400iS sports a recoil start system, includes an oil alert system and brushless alternator benefiting maintenance and efficiency. It also has a spark arrestor to reduce fire risks. Accessories for this model have not been specified.

Noise Level

Noise level in generators is critical for work requiring quiet operation like on a campsite or residential neighbourhood. The Engel R2500IS operates at 68 dBA while the Yamaha EF2400iS has a significant lower noise level at 54 dBA (comparable to a household refrigerator).

Engel R2500IS vs Yamaha EF2400iS Comparison Table

FeatureEngel R2500ISYamaha EF2400iS
Warranty4 Years4 Years
Engine Type122 cc171 cc, OHV, 4-stroke
Air CooledN/AY
Running watts2500 W2400 W
Max / Starting watts2500 W4000 W
Voltage (AC)240 V230 V
DC OutputUSB 1A 5V, 2.1A 5V12V / 8A
AC Frequency (Hz)5050
Rated Output (kVA)2.52
Fuel Tank Capacity4.5 L6 L
Run time (Hours)3h (full load)9 at 1/4 load
Dry Weight (Kg)23.532
Size (L x W x H)52 x 32 x 46 cm52.7 x 41.9 x 45.9 cm
Number of AC Outlets1 x 15 amp2
DC OutletsUSB 1A 5V, 2.1A 5V1x 12V
Parallel useYY
Starter SystemRecoil StartRecoil
Fuel gaugeYY
Oil alertN/AY
Noise Level (dBA)68 at 7m54


Choosing between Engel R2500IS and Yamaha EF2400iS generators depends largely on your needs. If affordability and lightness are top priorities Engel R2500IS could be your first choice. Yet, if you lean towards quietness, more power, extra starting watts and better run time without additional fuel expense then Yamaha EF2400iS could be your ideal partner.