Hyundai HY6500SEi vs Yamaha EF6300iSE Inverter Generators

Hyundai HY6500SEi

More running power

Higher starting power

Larger fuel capacity

Includes accessories

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Yamaha EF6300iSE

Quieter operation

Longer run time at 1/4 load

Equipped with wheels

More compact size

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Choosing a larger, portable generator can bring numerous benefits to your life. These trusty units are perfect for providing home backup during unforeseen outages, powering multiple tools on construction sites, running food trucks or coffee vans, or even supporting outdoor events or industrial machinery. However, figuring out the right size to buy, how noisy it can be and what fits within budget can be a bit of challenge.

That’s why we’re doing an in-depth comparison of two popular models on the market – the Hyundai HY6500SEi and the Yamaha EF6300iSE. We’ll look at key selling points from each brand, consider their performance and power, fuel usage and run time, physical specs, outputs and features and usability. Our ultimate goal is to help you decide which model is best for you.

Performance & Power

Running Power (W): The Hyundai HY6500SEi provides a continuous power supply of 6500W while its competitor Yamaha EF6300iSE offers 6300W. It’s essential not to exceed this number when considering the total running watts of your devices. For example, both generators could easily handle a water heater (3000W) and welder (4000W) operating simultaneously.

Starting Power (W): There’s not much difference here with the Hyundai peeking at 6500W whereas the Yamaha just edges it with a brief peak at 6600W when starting up devices like motors that require extra power.

Engine type: Both generators use fuel efficient OHV engines but the Hyundai houses a slightly larger 390cc engine compared to Yamaha’s 357cc.

Rated Output (kVA): The rated output varies with Hyundai offering a higher output (6.5 kVA) compared to Yamaha’s 5.5 kVA. This means the Hyundai may pull more current, which may be essential if you have equipment that requires a lot of power.

Inverter: Both models come equipped with inverter technology. This is great news as it means both these generators can provide cleaner and more reliable power necessary for sensitive electronics like laptops. They’re usually quieter and more fuel efficient too.

Fuel & Run Time

Fuel Type: No difference here with both generators using petrol.

Fuel Tank Capacity: The Hyundai has a slightly larger tank capacity at 18.5L compared to Yamaha’s 17L. In practical terms, this means you’d need to refill the Hyundai slightly less often than the Yamaha.

Run Time: Unfortunately, the run time for the Hyundai HY6500SEi hasn’t been specified by the manufacturer whilst the Yamaha EF6300iSE proudly boasts a 12.6 hour run time at 1/4 load. A longer run time means you’ll refuel less often, which might prove beneficial for extended use or in situations where fuel availability is limited.

Physical Specs

Dry Weight: There’s not much difference in weight between these two models – 89kg for the Hyundai compared to 91kg for the Yamaha. This slight disparity may not affect portability too much but could result in fewer features for lighter generators.

Size: Both models are similar in size, but the Hyundai is slightly larger and consequently could take up a bit more storage space than Yamaha’s model.

Wheels: We don’t have the wheel info on the HY6500SEi but we know that Yamaha EF6300iSE comes with wheels so it should be easier to move this model around.

Outlets & Parallel Use

AC Outlets: The Hyundai has three AC Outlets (2 x 15Amp 240v, 1 x 32Amp 240v) while the Yamaha has just three AC Outlets. This may allow you to power more devices at once when utilising the Hyundai.

DC Outlets: While the Hyundai model has a DC outlet (1 x 12V, 1 x 5V), sadly the Yamaha has none. These DC outlets can be vitally important for charging smaller appliances such as mobile phones or laptops.

Parallel Use: Information about parallel use – the possibility of connecting two generators together to double output – was not mentioned in either model’s specifications so we cannot compare them on this point.

Features & Usability

Features: Both models pack in a notable number of features, but there are some differences worth mentioning. For instance, the Hyundai’s starter system (Recoil / Electric / Remote / Auto) requires less physical effort than the Yamaha’s electric system. Hyundai also offers a digital display indicator and includes accessories like remote start keys and manual start keys, as well as a 12V DC charging cable and tools like a spark plug spanner, oil filler jug, and screwdriver.

Noise Level

Noise Level: When compared for noise level, measured in decibels (dBA) at 1/4 load, the Yamaha shines with a quieter operation at 58 dBA as opposed to the Hyundai’s like city traffic noise level at 65 dBA.

Hyundai HY6500SEi vs Yamaha EF6300iSE Comparison Table

FeatureHyundai HY6500SEiYamaha EF6300iSE
Warranty1 Years4 Years
Engine Type390 cc, OHV357 cc, OHV, 4-stroke
Air CooledYY
Running watts6500 W6300 W
Max / Starting watts6500 W6600 W
Voltage (AC)230 V230 V
DC OutputNot specifiedN/A
AC Frequency (Hz)5050
Rated Output (kVA)6.55.5
Fuel Tank Capacity18.5 L17 L
Run time (Hours)Not specified12.6 at 1/4 load
Dry Weight (Kg)8991
Size (L x W x H)80 x 60 x 78 cm78.0 x 61.6 x 69.2 cm
WheelsNot specifiedY
Number of AC Outlets2 x 15Amp 240v, 1 x 32Amp 240v3
DC Outlets1 x 12V, 1 x 5VNone
Parallel useNot specifiedN
Starter SystemRecoil / Electric / Remote / AutoElectric
Fuel gaugeNot specifiedY
Oil alertNot specifiedY
Noise Level (dBA)6558


In summary, while both these portable generators have their own strengths and suit different people’s needs, it eventually comes down to what you prioritise most. For those needing more power output and longer runtime, you might appreciate what Hyundai’s HY6500SEi has got in its armoury. Conversely, if quiet operation alongside thoughtful usability is your cup of tea, then Yamaha’s EF6300iSE should prove an ideal choice for you in this comparison.