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Firman H05751 Spec Review

The Firman H05751 is a portable open frame dual fuel generator with a rated wattage of 5700 W and a starting wattage of 7125 W.

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Description

The H5751 Dual fuel generator can run on both Gas and Liquid Propane fuel, giving you flexibility during a storm, or when you’re out camping. This generator 7100 starting Watts and 5700 running watts for both gasoline and LP with an electric start, for ease of use. (source: Firman (opens in a new tab))

Zoom on the Firman H05751

In a nutshell, the Firman H05751 is a portable generator mostly geared towards:

  • RV travellers looking for even more independence
  • People occasionally participating in outdoor fairs, festivals or events
  • Food truck owners who want to ensure that their business is fully self-contained and does not rely on potentially unreliable external power
  • Homeowners who want to be able to use the most necessary devices in their household, even during a blackout
  • Professionals who want to be able to deliver results, even during a power failure

In the sections ahead, the power characteristics, availability of various outlets, the portability, and any additional features of the device shall be discussed, including its emission compliance information.

Power & Run Time

The Firman H05751 in use

The Firman H05751

With its dual-fuel technology, the powerful and versatile Firman H05751 provides an output of 120/240V. While gasoline-powered, it gives a running wattage of 5700W along with a peak wattage of 7125W. While propane-powered, it provides 5700 rated watts and 7125 starting watts.

At a noise rating of 74 dBA (just slightly more noisy than a shower), this generator can be started via a simple traditional pull-start mechanism, or a convenient and easy-to-use electric starter (battery included).

Regarding its running time, the H05751, with a 8 gallons fuel capacity can operate for around 12 hours at 50% load with a full tank of gasoline (fuel consumption around 0.67 GPH). When using propane, it can run for around 5 hours (estimation based on a 20 lbs tank - propane consumption around 0.94 GPH).

The powering of sensitive electronic devices with the H05751 is not recommended due to its relatively high THD (<25%).

Outlets

The control panel features the following 6 AC outlets:

Two Duplexes 120V 20A (5-20R) GFCI
120V 30A (L5-30R) receptacle
120/240V 30A (L14-30R) receptacle

This Firman generator isn't quite RV Ready, but it features an L5-30R receptacle, allowing a simple RV connection through an L5-30P to TT-30R adaptor. Besides, since the H05751 bears a twist-lock L14-30R receptacle, it is transfer switch ready: it is easily connectible to a breaker box and can power your home in case of a power outage.

Portability

The dimensions of the Firman H05751, which are L30.2 x W27.5 x H26.3 in, and its typical, open frame design provides stability and enables the generator to be raised above ground level. The design is ideal for rough environments and demanding outdoor use.

Even though this device may be technically portable (as in movable), manipulation and transportation without special equipment can be a challenge, as it weighs 194.5 pounds. However, this lack of maneuverability is compensated by its wheel kit (⌀10") and its folding handle, with which you can conveniently shift it, once it's on the ground.

Features

Panel of the Firman H05751

The H05751's control panel

The H05751's status and activity may be monitored conveniently via the control panel, as it features a convenient meter, which displays voltage, frequency and lifetime hours.

A built-in fuel gauge allows for a quick, easy and convenient check of the fuel level of the generator.

As for its security measures, the device features an automatic low oil shut-off and an overload protection (circuit breaker), letting you use it with a peace of mind.

With the basic documentation and an owner's manual (opens in a new tab), letting you start the generator quickly, the Firman H05751 also comes with several accessories, including: tool kit, propane hose, funnel and oil.

Emissions

The Firman H05751 is EPA-approved and CARB-compliant. Therefore, its sale and purchase are permitted in all of the 50 states, including California.

Moreover, it features a spark arrestor, making it usable in forested areas.

Product Videos

The Firman H05751 versus other generators

The following charts are provided to give you an idea of how some of the key specs of the Firman H05751 compare to generators of similar power (between 5500 and 6500 W).

  • At a weight of 194.5 pounds, the Firman H05751 places in the expected weight range of the generators in the 5500-6500 rated wattage range. In terms of weight, one of the champions in their power range is the Lifan LF7250, standing at just 140 lbs.
  • The generator can be considered average in its noise for its power category, as it is rated at 74 dBA. If you’d prefer a less noisy device, one of the most quiet devices, which share the same power range with this one, is the Honda EU7000iS, whose lowest noise levels reach just 52 dBA.
  • Thanks to an impressive running time of around 12 hours at 50% load, the H05751 benefits from a higher run time than many generators of a similar output. Furthermore, considering the run times, one of the generators which have a roughly same power output, with the highest autonomy, is the Cat RP5500, as it provides around 15 hours.
  • While the run time is an important parameter, it is dependent on the fuel tank’s capacity and thus, doesn’t say much on its own unless we consider fuel consumption as well. This generator is rather wasteful, compared to other devices within the aforementioned output range, when it comes to gasoline consumption, as it reaches roughly 0.67 GPH at a 50% load. If you wish to acquire one of the most gasoline efficient products of this power range, the Lifan ESI 7000iER-EFI, with a fuel consumption of 0.38 GPH could be in your good books.

Price comparison

As you can see from this interactive chart, when compared to other 5500-6500W generators, the Firman H05751 is on the average side of the price range.

Therefore, this generator nicely fits in the expected budget for this kind of product.

The bottom line

STRENGTHS:
  • In the expected price range
  • Several accessories included
  • GFCI Outlets
  • Electric start
  • Dual Fuel
  • High run time
AVERAGE SPECS:
  • Decent weight (194.5 lbs)
  • Acceptable noise (74 dBA)
WEAKNESSES:
  • No remote start
  • Low fuel efficiency

Do you own the Firman H05751 and agree (or disagree) with these strengths and weaknesses?

Let us know and write your own review.

Features and Specifications

General
InverterNo
PortableYes
Parallel capableNo
RV readyNo
FuelDual Fuel (gasoline/propane)
Engine439 cc Firman Max-Pro Series OHV 4-stroke
Starting systemRecoil, Electric
VoltageAC: 120/240V 60 Hz
Power
 GasolinePropane
Running watts5700 W5700 W
Starting watts7125 W7125 W
Running amps (@120/240V)47.5/23.8 amps47.5/23.8 amps
Peaks amps (@120/240V)59.4/29.7 amps59.4/29.7 amps
Run time @50% load12 h5 h *
Run time @25% loadUnknownUnknown
Features
GFCI outletsYes
Covered outletsYes
Automatic Voltage RegulationYes
AC outlets
  • 2x Duplex 120V 20A (5-20R) GFCI
  • 1x 120V 30A (L5-30R)
  • 1x 120/240V 30A (L14-30R)
DC outletsNo
Data centerVFT
IndicatorsNo
Fuel tankSteel, 8 gal
Fuel gaugeYes
Misc
Weight194.5 lbs
Approx. dimensions (L x W x H)30.2 x 27.5 x 26.3 in
Noise (lower limit)74 dBA
THD< 25%
EmissionsCARB, EPA
SecurityLow oil and overload protection
Spark arrestorYes
NeutralBonded to frame
Accessories includedOil, funnel, tool kit, propane hose, battery, and wheel kit
Warranty3 years
SeriesHybrid

Unlike many websites, we did our best to research each of the specs above. That being said, we are not immune to making the occasional mistake or omission. Should you notice any missing or incorrect values, don't hesitate to suggest improvements so we can address the issue.
* Propane runtime is our own estimation, based on a 20 lbs tank and NIST 1994 GGE (Gasoline Gallon Equivalent) formula: 5.66 lbs of propane = 1 gal of gasoline.

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About FIRMAN Power Equipment

Founded in 1999, Firman Power Equipment is a company with a short, but established history in the power equipment industry. Based in Arizona, the company offers an immense range of products, including power tools, automotive equipment, storage utilities, work wear, but most importantly, a wide selection of generators of all sizes, designs and outputs. Interestingly, Firman is a wholly owned subsidiary of the China National Machinery Industry Corporation - a somewhat well renowned company in China and acts as a de facto distributor of their products in the US.

Warranty Information

The Firman H05751 is covered under a warranty for up to 3 years. This warranty may be limited and may not cover all parts of the generator.
For more information about the warranty of Firman generators, please consult Firman's warranty policies (opens in a new tab). Alternatively, you can also contact their Customer Support: 1-844-FIRMAN1 (844-347-6261).

Questions & Answers

What can it power?
Examples of items that can be simultaneously powered.
The examples below are based on a maximum load of 80% and estimated wattages. For a more accurate estimation, use our generator size calculator.
ItemRunning WattsStarting Watts
At homeAC (10,000 BTU)15002200
Dish washer15003000
Microwave (1000 watts)15001500
Set of 5 LED light bulbs5555
Total4555 W6055 W
For campingRV AC (11,000 BTU)10101600
RV refrigerator180600
Hair dryer18001900
Microwave (1000 watts)15001500
Set of 5 LED light bulbs5555
Total4545 W5135 W
For workTable saw18004500
Grinder14002500
Circular saw12003200
Total4400 W7100 W

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