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Honda EM6500SX vs NorthStar c8000s

Honda EM6500SX vs NorthStar c8000s

Comparing the Honda EM6500SX and NorthStar c8000s conventional generators. See how 5500 vs 6600 running watts, noise, weight, and warranty stack up.

  • Honda EM6500SX
  • NorthStar c8000s

Comparison Overview

Analysis by AJ Quick
Mechanical engineer and founder of RightGenerator

The NorthStar c8000s delivers significantly more power, with 6600 running watts and 8000 starting watts compared to the Honda EM6500SX's 5500 running watts and 6500 starting watts. That's roughly 20% more continuous power and a considerably higher surge capacity, which matters when you're starting large motors or running multiple high-draw appliances at once. The NorthStar also edges ahead on runtime, offering 10.6 hours at 50% load versus the Honda's 9.8 hours.

The Honda fights back on portability and noise. At 231.7 pounds, it's nearly 50 pounds lighter than the 280-pound NorthStar, making it easier to move around. More importantly, the Honda runs at 64 dB, which is noticeably quieter than the NorthStar's 73 dB. Since decibels are measured on a logarithmic scale, that 9 dB difference means the NorthStar is roughly eight times louder in perceived sound intensity. The NorthStar does come with a longer 4-year warranty compared to Honda's 3-year warranty, which adds some peace of mind for a heavier-duty machine.

Both generators scored nearly identically in overall ratings (6.13 vs 6.11), reflecting genuine tradeoffs rather than a clear winner. Buyers who value Honda's legendary reliability and quieter operation will lean one way, while those who need maximum wattage and longer coverage will lean the other.

Key takeaways

  • NorthStar c8000s delivers 6600 running watts, 20% more than the Honda's 5500
  • Honda EM6500SX runs at 64 dB, significantly quieter than the NorthStar's 73 dB
  • Honda weighs 231.7 pounds, nearly 50 pounds lighter than the 280-pound NorthStar
  • NorthStar offers a 4-year warranty versus Honda's 3-year coverage
  • NorthStar runs 10.6 hours at half load, edging out Honda's 9.8 hours
  • Both generators scored nearly identically in overall ratings at roughly 6.1 out of 10

Best use cases

Choose the Honda EM6500SX if you need a dependable home backup generator that won't overwhelm your neighborhood with noise. At 64 dB, it's quiet enough to run during extended outages without drawing complaints, and its lighter 231.7-pound frame makes it more manageable to reposition around your property. With 5500 running watts, it can handle essentials like a refrigerator, sump pump, lights, and a window AC unit simultaneously. Honda's reputation for engine longevity is well earned, and if you plan to store this generator for months between uses, you'll appreciate how reliably Honda engines start after sitting idle. This is also the better pick if you occasionally transport the generator in a truck bed, since every pound matters when you're loading and unloading by hand.

Choose the NorthStar c8000s if your power demands are higher and noise is less of a concern. With 6600 running watts and 8000 starting watts, it can comfortably run a small central AC unit, a well pump, power tools, or multiple large appliances at the same time. This makes it a strong candidate for job site use, where loud equipment is already the norm and raw power output is the priority. The 10.6-hour runtime at half load means fewer fuel stops during a long workday or overnight outage. The 4-year warranty is also a nice bonus, suggesting NorthStar's confidence in the machine's durability under heavy use.

The tradeoff is real, though. The NorthStar is significantly louder and heavier, so it's less practical for situations where you need to keep things quiet or move the unit frequently. And the Honda, while quieter and lighter, simply can't match the NorthStar's raw output if you have large loads to power.

Verdict & recommendation

If your priority is powering more equipment with higher surge capacity and you don't mind extra weight and noise, the NorthStar c8000s gives you a meaningful advantage with 6600 running watts and a 4-year warranty. If you value a quieter, lighter generator backed by Honda's proven engine reliability, the EM6500SX is the smarter pick for residential backup and situations where noise matters.

Neither generator is a bad choice. They scored almost identically overall, and the decision really comes down to whether you need more power or more livability. For suburban home backup, the Honda's quieter operation is a genuine quality-of-life benefit. For job sites, farms, or homes with heavy electrical loads, the NorthStar's extra 1100 running watts and higher surge capacity will serve you better in practice.

Last updated April 12, 2026

  • Model EM6500SX
    Model EM6500SX

    Honda 5,500W Gas Generator

    5500W
    Running
    64 dB
    Noise
    View details
  • Model c8000s
    Model c8000s

    NorthStar 6,600W Gas Generator

    6600W
    Running
    73 dB
    Noise
    View details
Quick charts
Each chart uses its own Y-axis scale (so numbers are comparable within a chart).
Running watts
W
Starting watts
W
Noise
dB
Runtime @50%
h
Running watts by fuel
Shows how output changes across gasoline/propane/natural gas (when available).
Generator Specifications Comparison
SpecificationHonda EM6500SXNorthStar c8000s
General
Product type
Generator
Generator
Fuel
Gasoline
Gasoline
InverterNoNo
Parallel capableNoNo
RV readyNoNo
Running watts
5500 W
Winner: Winner: 6600 W
Starting watts
6500 W
Winner: Winner: 8000 W
Noise (lower limit)
Winner: Winner: 64 dB
73 dB
Weight
Winner: Winner: 231.7 lbs
280 lbs
Run time @50% load
9.8 h
Winner: Winner: 10.6 h
Run time @25% load
Not available
Not available
Fuel tank
6.2 gal
8 gal
Fuel gaugeYesYes
Approx. dimensions (L × W × H)
41.4 x 27.8 x 28.3
41 x 32 x 29
Electrical
Voltage (AC)
120/240
120/240
Voltage (DC)
12
Not available
GFCI outletsYesYes
Covered outletsYesYes
Automatic Voltage RegulationYesYes
THD
Not available
< 5% %
Engine
Engine
Honda iGX390 OHV 4-stroke, cast iron sleeve
Honda GX390 OHV 4-stroke
Alternator
Not available
Not available
Starting system
Recoil, Electric, Remote
Recoil, Electric
Warranty
Warranty
3 years
4 years
Power by fuel
GasolineNot availableNot available
Running watts
5500 W
6600 W
Starting watts
6500 W
8000 W
Running amps (120V)
Not available
Not available
Running amps (240V)
Not available
Not available
Peak amps (120V)
Not available
Not available
Peak amps (240V)
Not available
Not available
Run time @50% load
9.8 h
10.6 h
Run time @25% load
Not available
Not available
Other
Data center
Not available
Not available
Indicators
false
false
Compliance
EPA, ANSI/PGMA G300-2023
CARB, EPA
Security
Not available
Not available
Spark arrestorYesYes
Neutral
Floating
true
UPC
786102007429
840321737618
Core / High-priority specs
Running Watts (Gasoline)
5500
6600
Starting Watts (Gasoline)
6500
8000
Runtime @ 50% Load (Gasoline)
9.8
10.6
AC Outlet Types
AC outlets2x Duplex 120V 20A (5-20R) GFCI1x 120V 30A (L5-30R)1x 120/240V 30A (L14-30R)
3x Duplex 120V 20A (5-20R); 1x 120V 30A (L5-30R); 1x 120/240V 30A (L14-30R)
Electrical & power
Frequency
60
60
Engine & construction
Engine Type
Honda iGX390 OHV 4-stroke, cast iron sleeve
OHV 4-stroke
Engine Displacement
389
389
Cylinder Sleeve
Cast iron sleeve
Not available
Engine Oil Type
10W-30
Not available
Runtime & fuel system
Runtime @ 50% Load (Gasoline)
9.8
10.6
Safety & compliance
Overload Protection System
Low oil and overload protection
Low oil and overload protection.
Low Oil ProtectionYesYes
Carbon Monoxide MonitoringYesYes
Included equipment
Starting Components
Recoil, Electric, Remote
Not available
Included Accessories
Battery and wheel kit
Funnel, Battery, and Wheel Kit
Warranty & identification
Commercial Warranty
3
Not available
Part Number
EM6500SXK2AN
Not available
Additional specs
Summary
The Honda EM6500SX is a 6500-watt generator equipped with an electric start, Bluetooth capability, and CO-MINDER for advanced carbon monoxide detection. It offers a long run time of up to 9.8 hours and can power a variety of household appliances.
The NorthStar c8000s is a commercial-grade portable generator designed for demanding job sites, featuring a Honda GX390 OHV engine and Quiet Armor Technology for reduced noise.
  • Most Powerful
    NorthStar c8000s
    6600W running
  • Quietest
    Honda EM6500SX
    64 dB
  • Longest Runtime
    NorthStar c8000s
    10.6h at 50% load
Where to buy
Prices can change. We update these automatically.
Honda EM6500SX
Store links
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NorthStar c8000s
Store links
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