All GeneratorsDealsCompareMy PicksGenerator Finder
All GeneratorsDealsCompareMy PicksGenerator Finder
  • Guides
  • Blog
  • FAQ
  • Rankings

Helping you find the right generator for your needs with objective specs and clear comparisons.

Categories

  • Quiet Generators
  • Inverter Generators
  • Dual-Fuel
  • Home Backup
  • Portable
  • All Brands

Resources

  • Rankings
  • Compare Generators
  • Generator Finder
  • Deals
  • Buying Guides
  • Blog
  • FAQ
  • About Us

Legal

  • Terms of Service
  • Privacy Policy
  • DMCA
  • Disclosures

Disclosure

RightGenerator is reader-supported. When you buy through links on our site, we may earn an affiliate commission at no cost to you.

© 2026 RightGenerator. All rights reserved.

Compare Generators Side-by-Side

Select up to 4 generators to compare specs, power output, noise levels, runtime and more. Your compare URL is shareable.

  • A-iPower GXS8200D
  • Cat RP6500 E
  • Model GXS8200D
    Model GXS8200D

    A-iPower 6,500W Dual-Fuel Generator

    6500W
    Running
    68 dB
    Noise
    View details
  • Model RP6500 E
    Model RP6500 E

    Cat 6,500W Gas Generator

    6500W
    Running
    0 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
SpecificationA-iPower GXS8200DCat RP6500 E
General
Product type
Generator
Generator
Fuel
Dual-Fuel
Gasoline
InverterNoNo
Parallel capableNoNo
RV readyNoNo
Running watts
Winner: Winner: 6500 W
Winner: Winner: 6500 W
Starting watts
Winner: Winner: 8200 W
8125 W
Noise (lower limit)
Winner: Winner: 68 dB
0 dB
Weight
Winner: Winner: 143.7 lbs
202 lbs
Run time @50% load
Not available—
Winner: Winner: 12 h
Run time @25% load
Not available—
Not available—
Fuel tank
6.3 gal
7.9 gal
Fuel gaugeYesYes
Approx. dimensions (L × W × H)
26 x 25 x 23.7
32.9 x 27.4 x 24.7
Electrical
Voltage (AC)
120/240
120/240
Voltage (DC)
5
Not available—
GFCI outletsYesYes
Covered outletsYesYes
Automatic Voltage RegulationYesYes
THD
23 %
Not available—
Engine
Engine
322 cc OHV 4-stroke, cast iron sleeve
420 cc OHV 4-stroke
Alternator
Not available—
Not available—
Starting system
Recoil
Recoil, Electric
Warranty
Warranty
3 years
2 years
Power by fuel
GasolineNot available—Not available—
Running watts
6500 W
6500 W
Starting watts
8200 W
8125 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
17 h
12 h
Run time @25% load
17 h
Not available—
PropaneNot available—Not available—
Running watts
5900 W
Not available—
Starting watts
7400 W
Not available—
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
Not available—
Not available—
Run time @25% load
9 h
Not available—
Other
Data center
Digital data center
Not available—
Indicators
true
false
Compliance
EPA, ANSI/PGMA G300-2023
CARB, EPA
Security
Not available—
Not available—
Spark arrestorYesYes
Neutral
true
true
UPC
850055834682
815683020067
Core / High-priority specs
Generator Type
Generator
Not available—
Running Watts (Gasoline)
6500
6500
Running Watts (Propane)
5900
Not available—
Starting Watts (Gasoline)
8200
8125
Starting Watts (Propane)
7400
Not available—
Rated Watts (Gasoline)
6500
Not available—
Rated Watts (Propane)
5900
Not available—
Peak Watts (Gasoline)
8200
Not available—
Peak Watts (Propane)
7400
Not available—
Runtime @ 50% Load (Gasoline)
17
12
Runtime @ 25% Load (Gasoline)
17
Not available—
Runtime @ 25% Load (Propane)
9
Not available—
AC Outlet Types
2x Duplex 120V 20A (5-20R) GFCI; 1x 120V 30A (L5-30R); 1x 120/240V 30A (L14-30R)
2x Duplex 120V 20A (5-20R); 1x 120/240V 30A (L14-30R); 1x 120V 30A (L5-30R)
Electrical & power
Frequency
60
60
Engine & construction
Engine Type
OHV 4-stroke, Cast iron sleeve
OHV 4-stroke
Engine Displacement
322
420
Cylinder Sleeve
Cast iron sleeve
Not available—
Engine Oil Type
Not available—
SAE 30 or 10W-30
Runtime & fuel system
Runtime @ 25% Load (Gasoline)
17
Not available—
Runtime @ 50% Load (Gasoline)
17
12
Controls & display
Display Type
Digital data center
Not available—
Safety & compliance
Overload Protection System
Low oil and overload protection
Low oil and overload protection
Low Oil ProtectionYesYes
Carbon Monoxide MonitoringYesNo
Included equipment
Mobility Components
Yes
Not available—
Starting Components
Not available—
Recoil, Electric
Included Accessories
Oil, funnel, tool kit, propane hose, and wheel kit
Oil, funnel, tool kit, battery, and wheel kit
Warranty & identification
Residential Warranty
3
Not available—
Commercial Warranty
3
Not available—
Part Number
GXS8200D
502-3688
Additional specs
Summary
The A-iPower GXS8200D is a 6,500-watt dual-fuel generator built for users who need flexible fuel options and extended runtime. On gasoline, it delivers 8,200 starting watts and 6,500 running watts. On propane, it steps down to 7,400 starting watts and 5,900 running watts. This power level handles most household circuits, job site tools, and RV systems simultaneously. The dual-fuel design means you can switch between gasoline and propane depending on what you have on hand and which fuel offers better economics for your situation. The 6.3-gallon tank runs for 17 hours at 25 percent load on gasoline, which translates to weeks of occasional use before refueling becomes a concern. At 50 percent load, the runtime extends even further on propane. The 322cc OHV 4-stroke engine with cast iron sleeve is built for durability in outdoor conditions. This is a workhorse for homeowners, contractors, and RV owners who value fuel flexibility over absolute portability.
The Cat RP6500 E is a 6500-watt gasoline generator built for residential backup and light commercial work. Its 8125-watt peak capacity means it can start large tools and appliances that draw high inrush current, then sustain 6500 watts of continuous power for multiple devices simultaneously. A 7.9-gallon fuel tank delivers 12 hours of runtime at 50% load, which translates to roughly one full workday or overnight backup without refueling. The gasoline engine is straightforward to maintain and refuel anywhere, making this unit practical for job sites, outdoor events, and emergency home power.
  • Most Powerful
    A-iPower GXS8200D
    6500W running
  • Quietest
    A-iPower GXS8200D
    68 dB
  • Longest Runtime
    Cat RP6500 E
    12h at 50% load
Where to buy
Prices can change. We update these automatically.
A-iPower GXS8200D
Store links
No links yet.
Cat RP6500 E
Store links
No links yet.
Disclosure: Some links may be affiliate links. Specs and comparisons are never hidden.