The Firman WT05571 is a portable tri-fuel inverter generator with a rated wattage of 5,500 W and a starting wattage of 6,850 W. (Read full specs)
JB Tools 
Outbound Power 
Amazon | Price history for the Firman WT05571 |
|---|
| Highest Price $1,899.00 Lowest Price $1,699.99 Current Price $1,799.00 |
Page Content
Description
Zoom on the Firman WT05571
To sum up, the Firman WT05571 is a portable inverter generator tailored for:
- RV travellers looking for even more independence
- People occasionally participating in sporting competitions, open-air performances and outdoor festivals
- Food truck owners who do not wish to see their business interrupted under any circumstances
- Homeowners who want to be sure of their ability to power their fridges, cooking tools, heating and lighting equipment during power failures
- Camping and tailgating hobbyists looking for a portable power source
- Professionals in need of safely powering high-intensity work or lighting equipment
In the following paragraphs, we shall explore the power characteristics, available outlets, portability, and any additional features of the device.
Power & Run Time
The Firman WT05571 delivers 120/240V and is equipped with a tri-fuel technology, enabling it to operate on gasoline, propane, or natural gas. When powered by gasoline, it achieves a running wattage of 5,500W and a peak wattage of 6,850W. Switching to propane provides 5,000 rated watts and 6,250 peak watts, while natural gas operation delivers 4,500W of rated wattage and 5,500W of starting wattage. Additionally, as the generator is parallel capable (parallel kit not included), it can be linked to a second unit for more power.
At a noise rating of 67 dBA (less noisy than background music), this inverter generator can be started via a classic hand-operated recoil starting mechanism, or a user-friendly and efficient electric starter (battery included).
Regarding its running time, the WT05571, with a 5.3 gallons fuel capacity, can operate for up to 14.5 hours with a full tank of gasoline (fuel consumption around 0.37 GPH). When using propane, it can run for up to 9.5 hours (estimation based on a 20 lbs tank - propane consumption around 0.49 GPH).
The WT05571 produces a clean sine wave: thanks to a <3% Total Harmonic Distortion (THD), your sensitive electronics can be safely plugged in the AC outlets.
Outlets
The control panel includes the following 5 AC outlets:
Moreover, it boasts 2 DC outlets: there's a 12V 8A (cigarette lighter style) receptacle providing easy battery charging capabilities and a 5V USB port (USB-C) providing convenient charging capabilities for mobile phones, tablets, and other electronic devices.
This Firman generator is RV Ready, as it features a TT-30R receptacle (TT stands for 'Travel Trailer'). In addition, since the WT05571 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 Firman WT05571 is an inverter generator and features an encased design with the following dimensions: L27.6 x W21.3 x H22.6 in. This design enhances aesthetics and helps minimize noise levels, distinguishing it from conventional, open frame products. This modern design aims to provide an ideal power solution to recreational users.
Despite its weight of 131.4 lbs, the generator is still considered 'portable,' meaning it is movable, although its heftiness may restrict portability in certain environments or require additional considerations for transportation and setup. Despite the restricted maneuverability, its set of 2 wheels (⌀8") and its folding handle provides a solution, allowing for convenient shifting once the generator is positioned on the ground.
Features
The WT05571's control panel
One of the many WT05571's features is the digital data center, included in its control panel, which conveniently provides information on the remaining run time, voltage, fuel level, frequency, lifetime run hours and power output and thus, helps you monitor its activity and status.
From a security standpoint, the product offers an overload protection (circuit breaker) and an automatic low oil shut-off, allowing you to use it with a peace of mind.
The WT05571 also benefits from Firman’s CO Alert carbon monoxide shutdown, which automatically shuts down the engine when harmful levels of carbon monoxide accumulate around the generator or a CO Alert fault occurs.
While the standard documentation and an owner's manual (opens in a new tab), helpful for starting the device promptly, come with the Firman WT05571, the following accessories are also included: propane hose, tool kit, oil and funnel.
Product Video
The Firman WT05571 versus other generators
The following charts are provided to give you an idea of how some of the key specs of the Firman WT05571 compare to inverter generators of similar power (between 5000 and 6000 W).
- At 131.4 lbs dry, the Firman WT05571 is consistent with the standard weight profile for inverters ranging from 5000 to 6000 rated watts. If you are mindful of weight, the WEN DF680iX is among the top contenders in this power range, with a dry weight of 94.8 pounds.
- When comparing it to devices with a similar running wattage, this inverter generator's lowest noise level of 67 dBA puts it alongside the noisier units. For those who are looking for a less noisy device, we suggest the Honda EU7000iS. With just 52 dBA, it is one of the most quiet devices in this power range.
- With up to 14.5 hours of runtime at a 25% load on a full tank, the WT05571 is in line with the average autonomy range for inverter generators of comparable power. If concerned with autonomy, one of the products of a comparable power output, which offers the highest run time, is the Champion 201532, boasting with up to 18 hours.
- While run time matters, it's heavily influenced by the fuel tank's capacity. Hence, it's important to consider fuel efficiency alongside. In terms of fuel efficiency within its wattage range, this inverter generator falls short: it consumes approximately 0.37 GPH at a 25% load. If you wish to acquire one of the most gasoline efficient products of this power range, the DuroMax XP7000iH, with a fuel consumption of 0.19 GPH could be in your good books.
Price comparison
As you can see from these interactive charts, when compared to other 5000-6000W multi-fuel generators, the Firman WT05571 is on the expensive side of the price range.
While certainly not the cheapest of its kind, purchasing it would most likely also mean enjoying the reliability of a high-end product.
The bottom line
- Tri-fuel
- CO Alert technology
- GFCI Outlets
- 4 different AC outlet types
- USB-C port
- RV Ready
- Electric start
- Parallel capable
- Inverter
- Decent weight (131.4 lbs)
- Decent run time
- On the expensive side
- Natural gas hose not included
- No remote start
- On the noisy side (67 dBA)
- Low fuel efficiency
Features and Specifications
| Inverter | Yes |
|---|---|
| Parallel capable | Yes, cable not included |
| RV ready | Yes |
| Fuel | Tri-Fuel (gasoline/propane/natural gas) |
| Engine | 322 cc OHV 4-stroke |
| Starting system | Recoil, Electric |
| Warranty | 3 years |
| Voltage | AC: 120/240V 60 Hz, DC: 12V |
| Gasoline | LPG | NG | |
|---|---|---|---|
| Running watts | 5,500 W | 5,000 W | 4,500 W |
| Starting watts | 6,850 W | 6,250 W | 5,500 W |
| Running amps (@120/240V) | 45.8/22.9 amps | 41.7/20.8 amps | 37.5/18.8 amps |
| Peak amps (@120/240V) | 57.1/28.5 amps | 52.1/26 amps | 45.8/22.9 amps |
| Run time @50% load | Unknown | Unknown | N/A |
| Run time @25% load | 14.5 h | 9.5 h * | N/A |
| GFCI outlets | Yes |
|---|---|
| Covered outlets | Yes |
| Automatic Voltage Regulation | Inverter |
| AC outlets |
|
| DC outlets | 1x 12V 8A (cigarette lighter style) 1x 5V USB port (USB-C) |
| Data center | Power output, fuel level, lifetime run hours, remaining run time, voltage and frequency |
| Indicators | No |
| Fuel tank | Steel, 5.3 gal |
| Fuel gauge | Digital |
| Weight | 131.4 lbs |
|---|---|
| Approx. dimensions (L x W x H) | 27.6 x 21.3 x 22.6 in |
| Noise (lower limit) | 67 dBA |
| THD | < 3% |
| Compliance | EPA, ANSI/PGMA G300-2023 |
| Security | Low oil and overload protection, CO monitoring |
| Spark arrestor | Yes |
| Neutral | Bonded to frame |
| Accessories included | Oil, funnel, tool kit, propane hose, and battery |
| Country of origin | China |
| Series | Whisper |
| UPC | 840876155714 |
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.
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 WT05571 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?
| Item | Running Watts | Starting Watts | |
|---|---|---|---|
| At home | Sump pump (1/2 hp) | 1050 | 2150 |
| Furnace fan (1/2 hp) | 875 | 2350 | |
| Refrigerator (energy star) | 192 | 1192 | |
| Electric range | 2100 | 2100 | |
| Security system | 180 | 180 | |
| Total | 4397 W | 5872 W | |
| For camping | Radiant heater | 1300 | 1300 |
| RV refrigerator | 180 | 600 | |
| Hair dryer | 1800 | 1900 | |
| RV AC (11,000 BTU) | 1010 | 1600 | |
| Radio | 100 | 100 | |
| Total | 4390 W | 4980 W | |
| For work | Table saw | 1800 | 4500 |
| Grinder | 1400 | 2500 | |
| Reciprocating saw | 730 | 960 | |
| Bug zapper | 80 | 80 | |
| Total | 4010 W | 6710 W |
Couldn't find the right answer for you? Ask your own question.
