Tri Fuel Inverter Portable Generator 6850W Electric Start With CO Alert
Tri Fuel Inverter Portable Generator 6850W Electric Start With CO Alert is backordered and will ship as soon as it is back in stock.
Ships fast. Enter your ZIP for a delivery date.
Save $150 Today
Up To15% OffUp to 15% off sitewide. Get an additional $150 off any order over $3,000 with code PF150 at checkout.
Have Questions?
Talk to an Expert
Our U.S.-based team can help you spec the right equipment or put together a custom quote.
Description
Description
The FIRMAN WT05571 Tri-Fuel Whisper Series Generator delivers versatile, dependable power with the freedom to run on gasoline, propane, or natural gas at the push of a button. Designed for RV use, camping, DIY projects, and home backup, this generator adapts to whatever the moment demands—without locking you into a single fuel source.
On gasoline, the WT05571 produces 6,850 starting watts and 5,500 running watts. Switch to propane for 6,250 starting watts and 5,000 running watts, or natural gas for 5,500 starting watts and 4,500 running watts, giving you reliable output no matter what fuel is available. Built into a compact 136.7 lb frame, it features an integrated wheel kit and handle for easy transport wherever power is needed.
Operating at just 67 dB, the WT05571 lives up to its Whisper Series name, making it ideal for campsites, RV parks, and residential use. Eco Mode improves fuel efficiency during lighter loads, while CO Alert technology automatically shuts the generator down if unsafe carbon monoxide levels are detected—adding an extra layer of safety during operation.
To handle a wide range of power needs, the WT05571 is equipped with a versatile outlet panel that includes a 120V 20A GFCI duplex (5-20R) for household devices, a 30A RV-ready TT-30R, a 30A 120/240V L14-30R, and a 50A 120/240V 14-50R outlet for higher-demand applications. USB-C fast charging and a 12V DC port round out the setup, making it easy to power modern electronics alongside larger equipment.
Quiet, adaptable, and built for real-world use, the FIRMAN WT05571 is a powerful tri-fuel solution you can rely on—at home, on the road, or off the grid.
The WT05571 comes with an engine oil bottle, an oil funnel, a tool kit, an LPG regulator, and a quick oil drain.
Payment & Security
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
Why Buy From Project Foundry?
Pro-grade equipment, real support, and a buying experience built around big-ticket gear. Here's exactly what you get with every order.
Hassle-Free Freight Delivery
Most equipment ships by freight on a pallet. Here's what to expect: orders process in 1 to 2 business days, with typical transit of 4 to 7 business days. The carrier calls ahead to schedule a curbside delivery appointment, so keep a good phone number on your order. Liftgate service is included on many items. Large equipment like car lifts and attachments are too big for a liftgate and need a forklift or similar to unload. No equipment on site? You've got options: have it delivered somewhere that does, like a neighbor's place or your workplace, or have it sent to a local freight terminal such as Estes or Old Dominion, where you can pick it up with a trailer and their forklift loads it for you. Contact us to arrange terminal pickup. Inspect before you sign: note any damage on the delivery receipt before signing, and for concealed damage, send us photos within 48 hours to protect your replacement coverage. Questions about delivery to your address? Call or text 331-272-5655. Full details are on our Shipping Policy.
Lowest Prices Online
We keep every price at the lowest point the manufacturer allows, so you're always starting from the best price we're permitted to advertise. Want to do better than that? We offer additional discounts for new customers, holidays, veterans, healthcare workers, and more. Call 331-272-5655 for exclusive pricing. Paying by wire, ACH, or check? Take an extra 3% off, since we skip the credit card processing fee and pass that savings straight to you.
Found it cheaper from another authorized dealer? Tell us. We'll verify they're a legitimate dealer and do our best to match or beat the price. We don't match eBay or marketplace listings. Reach us at 331-272-5655 before you order. Full terms are on our Price Match Guarantee page.
Free Warehouse Pickup
Many items are available for free pickup at our supplier warehouses, so you can skip freight charges entirely. Availability depends on the product and brand. Once your order is ready, we'll send written authorization with the location and pickup instructions, so please wait for that confirmation before heading out. Plan to pick up within 48 to 72 hours of the ready notice. Want to know if your item qualifies? Call or text 331-272-5655.
Authorized Dealer, Full Factory Warranty
We're an authorized dealer for every brand we carry. That means factory-fresh equipment with the full manufacturer warranty, never gray-market product from a random marketplace seller. If you ever need a warranty claim, we help you through it.
Heads up: the equipment world has its share of fake websites and unauthorized sellers pushing prices that are too good to be true. If you're ever unsure about a seller, reach out. We'll help you spot the red flags, even if you don't end up buying from us.
Flexible Monthly Financing
Spread the cost out with Shop Pay Installments. Break a big purchase into manageable monthly payments and get your equipment now instead of saving up for it. Select Shop Pay at checkout to see your options.












