FIRMAN Inverter Portable Generator 4125W Remote Start with CO Alert
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FIRMAN Inverter Portable Generator 4125W Remote Start with CO Alert
Description
The FIRMAN W03386 is a compact, capable inverter generator built for campers, RV enthusiasts, tailgaters, and anyone who needs reliable portable power. Delivering 4,125 starting watts and 3,300 running watts, it produces clean power with less than 3% THD - safe for powering sensitive electronics like laptops, smartphones, and tablets. At just 58 decibels at quarter load, it runs quietly enough for campgrounds, neighborhoods, or wherever peace and quiet matters.
Loaded with practical features including remote start, CO Alert safety technology, and a 9-hour runtime at 25% load, this generator is engineered to be as convenient as it is dependable. Whether you're parked at a campsite, set up at a tailgate, or dealing with an unexpected power outage, the W03386 keeps you running without the hassle.
Key Features
- 4,125 Starting / 3,300 Running Watts: Enough power to run an RV air conditioner, refrigerator, electronics, and more simultaneously.
- CO Alert Technology: Built-in carbon monoxide detection automatically shuts down the generator if dangerous CO levels are detected, keeping you and your family safe.
- Remote Start: Start the generator from a distance with the included remote control - no need to reach the pull cord.
- Inverter Technology - Under 3% THD: Produces clean, stable power safe for laptops, phones, tablets, and other sensitive electronics.
- 58 dB at Quarter Load: Whisper-quiet operation suitable for campgrounds, RV parks, and residential use.
- Up to 9-Hour Runtime: Runs up to 9 hours on a single 1.8-gallon tank at 25% load for extended use between fill-ups.
- Multiple Outlets: Features a 5-20R 120V duplex, a TT-30R RV-ready 30A twist-lock outlet, USB-A port, and a 12V DC power port for versatile connections.
- Parallel-Ready: Two parallel ports allow you to connect a second compatible FIRMAN inverter generator for doubled output when you need more power.
- 193cc Engine with Cast Iron Sleeve: Heavy-duty engine construction for long-lasting durability and reliable starts in any condition.
- 3-Year Warranty: Backed by FIRMAN's industry-leading warranty with U.S.-based customer support 7 days a week.
Shipping
Ships free! Please email us at service@omahasportsandgames.com for a delivery ETA or to confirm shipping details.
What's Included
- FIRMAN W03386 Inverter Portable Generator
- Engine oil bottle
- Oil funnel
- Spark plug wrench
- Screwdriver
- 12V battery cable
- Remote control
- Float charger
- Quick oil drain
Why You'll Love It
FIRMAN generators are engineered in the USA and built to endure everything from cold winter nights to scorching summer days - conditions that would sideline lesser machines. The W03386 strikes the rare balance between portability and performance, giving you real wattage in a package that weighs just 91 lbs and rolls on flat-free wheels. Remote start and CO Alert make it as user-friendly as it is safe, so you spend less time worrying about your power source and more time enjoying whatever adventure brought you here. The TT-30R RV outlet makes hookup effortless for RV owners, and the parallel capability means you can grow your power output as your needs grow. Trusted by outdoor enthusiasts and prepared households across the country, the W03386 is the kind of generator you buy once and rely on for years.
Product Specifications
View Product Specs
| Running Watts | 3,300W |
|---|---|
| Starting Watts | 4,125W |
| AC Voltage | 120V |
| Frequency | 60 Hz |
| Decibels | 58 dB @ 1/4 load |
| THD @ Full Load | 3% |
| Run Time | Up to 9 hours @ 25% load |
| Engine Displacement | 193cc |
| Fuel Type | Gasoline |
| Tank Size | 1.8 gallons |
| Start Type | Recoil / Electric / Remote |
| Outlets | (1) 5-20R 120V 20A Duplex, (1) TT-30R 120V 30A Twist-Lock, (1) USB-A (2.1A/5V), (1) 12V DC Port (8.3A/100W) |
| Parallel Ports | 2 |
| Cast Iron Sleeve | Yes |
| Low Oil Shutoff | Yes |
| CO Alert | Yes |
| Unit Dimensions | 23.2" x 17.8" x 17.9" |
| Unit Weight | 91 lbs |
| Carton Weight | 104 lbs |
| Wheels | 5.5" flat-free plastic wheels |
| Handle | U-shape folding handle |
| Certifications | CARB, EPA, cETL |
| Warranty | 3-year limited warranty |
| UPC | 840876133866 |
Manuals & Guides
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FAQ
What is CO Alert and why does it matter?
CO Alert is FIRMAN's built-in carbon monoxide detection system. If the generator senses dangerously elevated CO levels in the surrounding area, it automatically shuts down to prevent exposure. This is a critical safety feature, especially when using the generator near enclosed spaces like camper vans, tents, or garages. Never run any generator indoors, but CO Alert adds an important layer of protection when operating in semi-enclosed or poorly ventilated environments.
Is this generator safe to use with sensitive electronics?
Yes. As an inverter generator, the W03386 produces clean power with less than 3% total harmonic distortion (THD). This is well within the safe range for laptops, smartphones, tablets, CPAP machines, and other electronics that require stable, clean power. A standard open-frame generator would not offer this level of power quality.
Can this generator power an RV air conditioner?
Yes, for most RV air conditioners rated at 13,500 BTU or lower. The TT-30R 30-amp twist-lock outlet is specifically designed for RV hookup, and the 4,125 starting watts provide enough surge capacity to start a typical RV AC unit. For larger or dual AC setups, you may want to use the parallel capability to connect a second compatible FIRMAN inverter generator.
How does the remote start work?
The included remote control lets you start and stop the generator wirelessly from a distance. This is especially convenient when the generator is stored in a compartment or you'd rather not walk outside in bad weather. The generator must be properly set up and fueled before using the remote - it simply replaces the need to manually pull the recoil cord or press the electric start button.
What does "parallel capable" mean and how do I use it?
Parallel capability means you can connect two compatible FIRMAN inverter generators together using a parallel kit (sold separately) to combine their output. This effectively doubles your available wattage, which is useful if you need more power than a single unit provides. The W03386 has two parallel ports built in for this purpose.
Does this generator require assembly? How does it ship?
The generator arrives boxed via ground freight and requires minimal setup - attaching the handle and wheels, adding the included engine oil, and following the quick-start guide before first use. No complex assembly is required. Please email us at service@omahasportsandgames.com for specific delivery ETA or freight questions.
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.