Briggs & Stratton Q6500 vs Hyundai HY4000SEi Generator Comparison

Briggs & Stratton Q6500

Higher continuous power

Larger Fuel Tank

Extended Running Time

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Hyundai HY4000SEi

Lighter Weight

Smaller Size for Storage

Quieter Operation

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When picking a portable generator, there are many factors to consider. It can be a bit overwhelming, especially given all the technical jargon and numbers associated with each model. That’s why we’ve prepared this guide to help you understand what’s important and choose the right generator for your needs. We’ll be reviewing two popular models: the Briggs & Stratton Q6500 and the Hyundai HY4000SEi.

Both brands tout these models as offering high performance in a compact design, while taking steps to reduce noise levels for greater ease of use. These features make them suitable options for high-power needs like backing up home power during outages, powering tools on construction sites, running food trucks or coffee vans or supporting outdoor events or industrial machinery.

We’ll look at such aspects as performance and power, fuel usage and run time, physical specs, outlet types, usability features and noise levels. Let’s dive in!

Performance & Power

Running Power (W): The Briggs & Stratton Q6500 offers 5000W running power, compared to Hyundai HY4000SEi’s 4000W. This means that the former can handle slightly heavier loads continuously. It should reliably power a water heater (3000W) or welder (4000W). If you often find yourself powering multiple heavy appliances simultaneously, the higher continuous power output of the Briggs & Stratton may be helpful.

Starting Power (W): The starting power is also higher for the Briggs Q6500 model at 6500W compared to 4000W of the Hyundai model which means it can better manage devices that require an initial ‘surge’ of power when switched on.

Engine type: Both feature OHV (Overhead Valve) engines, known for superior fuel efficiency, durability, and improved power output. The Briggs model has a slightly more powerful 306cc engine as opposed to the Hyundai’s 223cc.

Rated Output (kVA): Similarly, The Q6500 has a higher rated output (6.5 kVA) versus HY4000SEi’s 5 kVA. This means the former can accommodate appliances that pull more current than their running power would suggest.

Inverter: Both models possess inverter technology ensuring they can safely power sensitive electronics like laptops due to cleaner power output. They’re also quieter and more fuel-efficient compared to traditional generators.

Fuel & Run Time

Fuel Type: Both generators run on petrol.

Fuel Tank Capacity: There’s a notable difference in fuel tank size, with the Briggs holding almost twice as much fuel with its 18.9 L tank compared to Hyundai’s 9 L. More fuel capacity equals longer run times between refills but does add to the weight of the unit.

Run Time: The Briggs has an impressive14 hours of run time at 1/4 load, but unfortunately, no data available for the Hyundai.

Physical Specs

Dry Weight: In terms of portability, the lighter Hyundai generator could be easier to move around at 55 kg compared to the Briggs’ 65 kg.

Size: The Briggs & Stratton Q6500 takes up marginally more space with dimensions of 64.8 x 53.6 x 54.4cm vs Hyundai HY4000SEi’s 60 x 45.2 x 50cm which could make a difference in certain settings where space is restricted or particularly valued.

Wheels: The Briggs model comes with robust wheels for easier transportation but no info was provided for the Hyundai model.

Outlets & Parallel Use

AC Outlets: More AC outlets mean more devices can be powered simultaneously. The Briggs Q6500 boasts 3 AC outlets compared to 2 in the Hyundai HY4000SEi.

DC Outlets: While the Briggs & Stratton comes with 2 USB ports, no specific info was provided on the DC outlets Hyundai has. However, The number and type of DC outlets will affect what you can power with them.

Parallel Use: Unfortunately, data was not provided on whether either model allows for parallel use, which could potentially double power output when connecting two identical generators.

Features & Usability

The Briggs Q6500 offers a recoil starter system, which while more traditional and muscle intensive, has proven reliability. In contrast, the Hyundai HY4000SEi goes a step further by providing not only recoil but electric and remote start systems for added convenience.
A fuel gauge is available on the Briggs Q6500 while information for the Hyundai model is not stated. Knowing your fuel level can prevent unexpected shutdowns.
An oil alert comes standard on both generators to reduce the risk of engine damage due to low oil levels.
Other data regarding features was not specified for either model.

Noise Level

The Briggs & Stratton is notably louder at 66dBA at 7m compared to the Hyundai’s quieter 59dBA (at a similar distance.) For context, this difference lies between typical city traffic levels (85dBA) and a normal conversation (60-70dBA). If operating noise is a priority for you, it’s an important aspect to consider.

Briggs & Stratton Q6500 vs Hyundai HY4000SEi Comparison Table

FeatureBriggs & Stratton Q6500Hyundai HY4000SEi
Warranty3 Years1 Years
Engine Type306 cc, OHV223 cc, OHV
Air CooledNot specifiedY
Running watts5000 W4000 W
Max / Starting watts6500 W4000 W
Voltage (AC)230 V230 V
DC Output2 x USBNot specified
AC Frequency (Hz)5050
Rated Output (kVA)6.55
Fuel Tank Capacity18.9 L9 L
Run time (Hours)14 at 1/4 loadNot specified
Dry Weight (Kg)6555
Size (L x W x H)64.8 x 53.6 x 54.4 cm60 x 45.2 x 50 cm
Wheels8″ Never FlatNot specified
Number of AC Outlets32
DC Outlets2 x USB1x 12V
Parallel useNot specifiedNot specified
Starter SystemRecoilRecoil / Electric / Remote
Fuel gaugeYNot specified
Oil alertYNot specified
Noise Level (dBA)66dba at 7m59


The Briggs & Stratton Q6500 suits those needing more power and longer running times even though it is a bit noisier and heavier due to its larger engine. On the other hand, then Hyundai HY4000SEi stands out for its quieter operation, light-weight design for easier transportation despite having less power output and smaller fuel tank. Your choice will depend on your unique circumstances and priorities.