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.

  • Firman H08051
  • Powermate PM3800
  • Model H08051
    Model H08051

    Firman 8,000W Dual-Fuel Generator

    8000W
    Running
    74 dB
    Noise
    View details
  • Model PM3800
    Model PM3800

    Powermate 3,000W Gas Generator

    3000W
    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
SpecificationFirman H08051Powermate PM3800
General
Product type
Generator
Generator
Fuel
Dual-Fuel
Gasoline
InverterNoNo
Parallel capableNoNo
RV readyYesNo
Running watts
Winner: Winner: 8000 W
3000 W
Starting watts
Winner: Winner: 10000 W
3800 W
Noise (lower limit)
Winner: Winner: 74 dB
0 dB
Weight
212 lbs
Winner: Winner: 96 lbs
Run time @50% load
12 h
Winner: Winner: 14 h
Run time @25% load
Not available—
21 h
Fuel tank
8 gal
5 gal
Fuel gaugeYesYes
Approx. dimensions (L × W × H)
30.2 x 27.5 x 26.3
23.8 x 18.1 x 19.1
Electrical
Voltage (AC)
120/240
120
Voltage (DC)
Not available—
Not available—
GFCI outletsYesNo
Covered outletsYesYes
Automatic Voltage RegulationYesNo
THD
25 %
Not available—
Engine
Engine
Firman Max-Pro Series OHV 4-stroke, cast iron sleeve
212 cc OHV 4-stroke
Alternator
Not available—
Not available—
Starting system
Recoil, Electric
Recoil
Warranty
Warranty
3 years
3 years
Power by fuel
GasolineNot available—Not available—
Running watts
8000 W
3000 W
Starting watts
10000 W
3800 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
12 h
14 h
Run time @25% load
Not available—
21 h
PropaneNot available—Not available—
Running watts
7250 W
Not available—
Starting watts
9050 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
5 h
Not available—
Run time @25% load
Not available—
Not available—
Other
Data center
Not available—
Not available—
Indicators
false
false
Compliance
CARB, EPA
EPA
Security
Not available—
Not available—
Spark arrestorYesYes
Neutral
Bonded to frame
Floating
UPC
840876180518
696471080339
Core / High-priority specs
Running Watts (Gasoline)
8000
3000
Running Watts (Propane)
7250
Not available—
Starting Watts (Gasoline)
10000
3800
Starting Watts (Propane)
9050
Not available—
Runtime @ 50% Load (Gasoline)
12
14
Runtime @ 50% Load (Propane)
5
Not available—
Runtime @ 25% Load (Gasoline)
Not available—
21
AC Outlet Types
1x Duplex 120V 20A (5-20R); 1x 120V 30A (L5-30R); 1x 120/240V 30A (L14-30R); 1x 120/240V 50A (14-50R)
2x Duplex 120V 20A (5-20R)
Electrical & power
Frequency
60
60
Engine & construction
Engine Type
OHV 4-stroke
212 cc OHV 4-stroke
Engine Displacement
439
212
Cylinder Sleeve
Cast iron
Not available—
Engine Oil Type
Not available—
10W-30 / SAE 30
Runtime & fuel system
Runtime @ 25% Load (Gasoline)
Not available—
21
Runtime @ 50% Load (Gasoline)
12
14
Runtime @ 50% Load (Propane)
5
Not available—
Safety & compliance
Overload Protection System
Low oil and overload protection
Low oil and overload protection
Low Oil ProtectionYesYes
Included equipment
Mobility Components
Wheel kit
Not available—
Starting Components
Recoil, Electric
Oil
Fuel Connection Components
Propane hose
Not available—
Included Accessories
Oil, funnel, tool kit, propane hose, battery, and wheel kit
Oil
Warranty & identification
Commercial Warranty
3
3
Part Number
Not available—
P0081100
Additional specs
Summary
The Firman H08051 is an 8,000-watt dual-fuel generator built to power job sites, homes during outages, and RV setups. Running on gasoline, it delivers 8,000 watts continuously and 10,000 watts at startup, enough to run a refrigerator, microwave, and multiple power tools at once. Switch to propane and the output drops to 7,250 watts running and 9,050 watts starting, a trade-off for fuel flexibility and longer shelf life. The 439cc cast-iron engine is engineered for durability in commercial and residential use. At 212 pounds, this is a stationary or semi-portable unit, not a grab-and-go machine.
The Powermate PM3800 is a durable and compact portable generator, ideal for home use and DIY projects. It features a Generac 212cc OHV engine, delivering 3800 starting watts and 3000 running watts. The generator offers a 21-hour runtime at 25% load, facilitated by a 5-gallon fuel tank. Its POWERDIAL™ simplifies the startup process with an integrated off/run/choke knob.
  • Most Powerful
    Firman H08051
    8000W running
  • Quietest
    Firman H08051
    74 dB
  • Longest Runtime
    Powermate PM3800
    14h at 50% load
Where to buy
Prices can change. We update these automatically.
Firman H08051
Store links
No links yet.
Powermate PM3800
Store links
No links yet.
Disclosure: Some links may be affiliate links. Specs and comparisons are never hidden.