FIRMAN Dual Fuel Inverter Portable Generator 3300W Electric Start
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FIRMAN Dual Fuel Inverter Portable Generator 3300W Electric Start
Description
The FIRMAN WH03042 is a dual fuel inverter generator built for those who demand quiet, reliable power without being tied to a single fuel source. Running on gasoline or propane, it delivers clean electricity with less than 3% total harmonic distortion (THD) - making it safe for sensitive electronics like laptops, smartphones, and TVs. Whether you're heading out for a weekend camping trip, tailgating before the big game, or preparing for a home power outage, this generator is sized and engineered to handle it all.
Powered by a 171cc FIRMAN engine with a cast iron sleeve, the WH03042 puts out 3,300 starting watts and 3,000 running watts on gas, with 3,000 starting watts and 2,700 running watts on propane. At just 58 dB at quarter load, it's one of the quietest generators in its class - so your neighbors (or fellow campers) will thank you. Electric start with recoil backup and Eco Mode make it as easy to operate as it is dependable.
Key Features
- Dual Fuel Flexibility: Runs on gasoline or propane (LPG) - switch fuels to match availability and convenience.
- 3,300W Starting / 3,000W Running (Gas): Delivers strong starting power and steady running watts for appliances, RVs, and electronics.
- Clean Inverter Power (Less than 3% THD): Safe for laptops, smartphones, TVs, and other sensitive electronics without risk of damage.
- 171cc FIRMAN Engine with Cast Iron Sleeve: Built for durability and long-term performance under regular use.
- 58 dB at Quarter Load: Whisper Series-quiet operation - ideal for campgrounds, neighborhoods, and RV parks.
- Electric Start with Recoil Backup: Push-button convenience for easy startup, with recoil as a reliable backup option.
- Eco Mode: Automatically adjusts engine speed to match the load, maximizing fuel efficiency and extending runtime.
- Up to 9 Hours Runtime at 25% Load: 1.8-gallon fuel tank keeps you powered through the night or a full day of use.
- RV-Ready TT-30R Outlet: Includes a 120V 30A twist-lock outlet specifically for RV hookups - no adapter needed.
- Versatile Outlet Panel: Features a 5-20R duplex outlet, TT-30R twist-lock, USB-A port, and 12V DC power port to run multiple devices simultaneously.
- Parallel-Ready: Two parallel ports allow you to connect a second compatible FIRMAN inverter for doubled power output.
- Low Oil Shutoff: Automatically shuts the engine down if oil levels drop too low, protecting the engine from damage.
- 3-Year Warranty: Backed by FIRMAN's 3-year limited warranty for long-term peace of mind.
Shipping
Ships free! Please email us at service@omahasportsandgames.com for a delivery ETA or to confirm shipping details.
What's Included
- FIRMAN WH03042 Dual Fuel Inverter Portable Generator
- U-shape folding handle
- 5.5" flat-free wheels (yellow plastic)
Why You'll Love It
The FIRMAN WH03042 has earned its reputation as a go-to generator for RVers, campers, and homeowners who refuse to compromise on reliability or convenience. Dual fuel capability means you're never left stranded when one fuel source isn't available - simply switch to propane and keep going. The inverter technology and ultra-quiet operation make it welcome in spaces where traditional open-frame generators simply aren't appropriate, from campground quiet hours to suburban driveways.
FIRMAN generators are trusted by recreational users and emergency preparedness planners alike, and the WH03042 reflects the brand's commitment to engineering that holds up over years of use. The cast iron sleeve engine, low oil shutoff, and 3-year warranty give you confidence that this generator will be ready when you need it most. From powering an RV air conditioner to keeping critical home devices running during an outage, the WH03042 is a smart, long-term investment in portable power.
Product Specifications
View Product Specs
| Engine | 171cc FIRMAN Engine |
|---|---|
| Running Watts (Gas) | 3,000W |
| Starting Watts (Gas) | 3,300W |
| Running Watts (Propane) | 2,700W |
| Starting Watts (Propane) | 3,000W |
| AC Voltage | 120V |
| Frequency | 60 Hz |
| THD at Full Load | Less than 3% |
| Noise Level | 58 dB at 1/4 load |
| Fuel Type | Gas / LPG (Propane) |
| Tank Size | 1.8 gallons (plastic) |
| Runtime | Up to 9 hours at 25% load |
| Start Type | Electric Start with Recoil Backup |
| Outlets | (1) 5-20R 120V 20A Duplex, (1) TT-30R 120V 30A Twist-Lock, (1) USB-A 2.1A/5V DC, (1) 12V DC Power Port |
| Parallel Ports | 2 |
| Cast Iron Sleeve | Yes |
| Low Oil Shutoff | Yes |
| Eco Mode | Yes |
| Unit Dimensions (L x W x H) | 23.2" x 17.8" x 17.9" |
| Unit Weight | 90 lbs |
| Carton Weight | 108 lbs |
| Wheels | 5.5" yellow plastic flat-free |
| Handle | U-shape folding handle |
| EPA Certified | Yes |
| cETL Certified | Yes |
| CARB Certified | No |
| Warranty | 3 years |
| UPC | 840876130421 |
| Shipping Method | Ships standard ground; assembly not required |
Manuals & Guides
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FAQ
What is the difference between running watts and starting watts?
Starting watts (also called surge watts) are the extra power a generator provides for a brief moment when a motor-driven appliance first turns on - things like refrigerators, air conditioners, and power tools need a short burst of extra power to get going. Running watts are the continuous power the generator sustains once the device is up and running. Always match your devices' running wattage requirements to the generator's running watts, and make sure total startup demand doesn't exceed the starting watts rating.
Can I run this generator on propane instead of gasoline?
Yes - the WH03042 is designed to run on either gasoline or propane (LPG). On propane, it delivers 3,000 starting watts and 2,700 running watts. Propane burns cleaner, stores indefinitely without degrading, and is widely available - making it a great choice for emergency preparedness or extended storage between uses.
Is this generator safe to use with sensitive electronics like laptops and TVs?
Yes. As an inverter generator, the WH03042 produces clean power with less than 3% total harmonic distortion (THD). This is comparable to the power quality from a standard household outlet and is safe for laptops, smartphones, tablets, televisions, and other sensitive electronics. Traditional open-frame generators typically produce much dirtier power that can damage or degrade sensitive devices over time.
Is this generator RV-ready?
Yes - the WH03042 includes a TT-30R 120V 30A twist-lock outlet specifically designed for RV hookups. This is the standard RV power connection found at most campgrounds and RV parks. You can plug your RV directly into this outlet without needing any adapters, making it a convenient power solution for travel trailers, fifth wheels, and motorhomes.
Can I connect two of these generators together for more power?
Yes - the WH03042 is parallel-ready and features two parallel ports on the control panel. By connecting a second compatible FIRMAN inverter generator with a parallel kit (sold separately), you can effectively double your power output. This is a great option if you need more wattage than a single unit provides without upgrading to a larger, less portable generator.
How loud is this generator?
The WH03042 operates at 58 dB at quarter load - roughly equivalent to the noise level of a normal conversation or a quiet office. This makes it one of the quieter generators in its power class and well-suited for use in campgrounds, RV parks, or residential areas where noise is a concern. Note that noise levels will increase slightly at higher loads.
Thank you for trusting us with your order! This product is shipped directly from the manufacturing warehouse to get to customers all over the U.S. as soon as possible!
While many of our products are prepared and shipped out within 48 hours, some of our items are built to order or require custom pieces that could take 2-6 weeks to prepare before shipping! Please contact us at 888-884-2234 for a delivery ETA if you have a strict timeline.
Thanks!
Omaha Sports & Games Team
Returns & Refunds Policy
Return Policy
We have a 30-day return policy, which means you have 30 days after receiving your item to request a return.
To be eligible for a return, your item must be in the same condition that you received it, unworn or unused, with tags, and in its original packaging. You’ll also need the receipt or proof of purchase. To start a return, you can contact us at service@omahasportsandgames.com.
If your return request is accepted, it will be up to you as the buyer to return the item in its original packaging, unworn and unused. You as the buyer will be responsible for paying the return shipping. We may be able to assist you in scheduling a pickup for return but the payment will still be your responsibility. You can always contact us for any return question at service@omahasportsandgames.com.
All products are subject to a minimum 15% restocking fee based on the quality of the returned product and packaging.
Items opened, tested, used, or any other non-new condition may be eligible for return based on the manufacturer's return policy.
Shipping Damages and Issues
You must inspect your order upon reception and refuse delivery if you see damage. DO NOT sign for delivery if there is apparent damage to the product. If you sign for the delivery and later claim shipping damage, there is very little we can do to help.
If your order does not require signing at delivery and is instead just dropped off at doorstep with damage, contact us immediately with photos of the damaged boxes.
If your item(s) is defective, damaged or if you receive the wrong item, contact us immediately so that we can evaluate the issue and make it right.
Exceptions / non-returnable items
Certain types of items cannot be returned, such as custom products, special orders or personalized items. Please get in touch if you have questions or concerns about your specific item.
Unfortunately, we cannot accept returns on sale items, gift cards, or multiple product bundle discounts.
| Specification name | Specification Value |
|---|---|
| Color pattern | Blue, Black |
| Ignition system | Electronic |
| Power source | Gasoline, Propane |