Hyundai HY4000SEi vs Ryobi RPGENINV4K Inverter Generators

Hyundai HY4000SEi

Higher running power

Digital display

View at My Generator


Lighter weight

Wheels for portability

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Choosing a large portable generator can be a daunting task. People often require them for high-power needs, including home backup during outages, running multiple tools on construction sites, supporting outdoor events or even driving food trucks or coffee vans. On the flip side, the challenge lies in determining the perfect size—something powerful enough yet not too loud and within your budget constraints.

This article compares two popular models, the Hyundai HY4000SEi and Ryobi RPGENINV4K. These generators pack a punch when it comes to performance and have been recognised by their respective brands for their high-performance potentials, compact design, noise reduction features and user-friendly technology. The aim of this article is to help you understand whether either of these models may be right for you.

Performance & Power

Running Power (W): Hyundai HY4000SEi (4000W) vs Ryobi RPGENINV4K (3100W). Running power refers to the amount of continuous power a generator can provide. The Hyundai model provides more running power than the Ryobi model making it ideal for running heavy appliances like a water heater or welder.

Starting Power (W): Hyundai HY4000SEi (4000W) vs Ryobi RPGENINV4K (4000W). Both generators provide the same starting power, which helps when starting devices with motors that need an initial burst of power.

Engine type: Hyundai HY4000SEi has a 223 cc OHV engine while Ryobi RPGENINV4K offers a slightly smaller 212 cc OHV engine. An OHV engine indicates durability, better fuel efficiency and improved power output.

Rated Output (kVA): Hyundai HY4000SEi offers 5kVA which gives you an idea of its apparent power—perhaps more than what you’d extrapolate from wattage alone. This means it has a greater capacity to power equipment that pulls more current which could be beneficial in some scenarios.

Inverter: Both, Hyundai HY4000SEi and Ryobi RPGENINV4K models, are equipped with inverter technology. This means they produce ‘clean’ power suitable for sensitive electronics like laptops, while typically also being more fuel efficient and quieter.

Fuel & Run Time

Fuel Type: Both models use petrol as their fuel type.

Fuel Tank Capacity: Hyundai HY4000SEi (9L) vs Ryobi RPGENINV4K(12L). With its larger fuel tank, the Ryobi model would require less frequent refills compared to the Hyundai model.

Run Time: The Ryobi generator provides 12 hours of run time at half load but the Hyundai generator’s run time hasn’t been specified. Longer run time means less frequent refuelling ideal for extended usage or situations where fuel availability is limited.

Physical Specs

Dry Weight: Hyundai HY4000SEi (55 kg) vs Ryobi RPGENINV4K (35 kg). The Ryboi model is noticeably lighter than the Hyundai model making it easier to move around.

Size: Both generators are similar in dimensions meaning they would occupy similar storage spaces.

Wheels: The Ryobi model comes with wheels easing the task of moving it around unlike the Hyundai model which doesn’t specify if it has wheels.

Outlets & Parallel Use

AC Outlets: Hyundai HY4000SEi provides 2 AC outlets whilst the Ryobi RPGENINV4K offers 3. More outlets mean you can power more devices simultaneously.

DC Outlets: Only the Hyundai generator has one DC outlet that can be used for charging smaller appliances while the Ryobi doesn’t provide this feature.

Parallel Use: This ability to connect the same model generators to double your power output hasn’t been specified for either model.

Features & Usability

Starter System: While the Hyundai generator offers a recoil, electric and also remote start system, Ryobi has an Easy Start Technology.

The Hyundai generator also includes a unique digital display which provides real-time information about its performance.

Noise Level

Noise Level: Hyundai HY4000SEi (59 dBA) vs Ryobi RPGENINV4K (67 dBA). The Hyundai generator operates at a slightly lower noise level than the Ryobi one which is still louder than a household refrigerator but quieter than a vacuum cleaner.

Hyundai HY4000SEi vs Ryobi RPGENINV4K Comparison Table

FeatureHyundai HY4000SEiRyobi RPGENINV4K
Warranty1 YearsNot specified Years
Engine Type223 cc, OHV212 cc, OHV
Air CooledYNot specified
Running watts4000 W3100 W
Max / Starting watts4000 W4000 W
Voltage (AC)230 V240 V
DC OutputNot specifiedNot specified
AC Frequency (Hz)5050
Rated Output (kVA)5Not specified
FuelPetrolUnleaded Petrol
Fuel Tank Capacity9 L12 L
Run time (Hours)Not specified12 (at half load)
Dry Weight (Kg)5535
Size (L x W x H)60 x 45.2 x 50 cm58.5 x 38 x 54 cm
WheelsNot specifiedY
Number of AC Outlets23
DC Outlets1x 12VNone
Parallel useNot specifiedN
Starter SystemRecoil / Electric / RemoteEasy start technology
Fuel gaugeNot specifiedNot specified
Oil alertNot specifiedNot specified
Noise Level (dBA)5967


Choosing between the Hyundai HY4000SEi and Ryobi RPGENINV4K would depend on what features are more important for your need. If you are seeking more power, the Hyundai generator might be better suited as it provides a higher running power and has an additional DC outlet. On the other hand, if compactness and mobility is your priority then the lighter and quieter Ryobi generator, with wheels for easy movement, may be the ideal choice.