The FIRMAN WH03242 Dual Fuel Whisper-Series Inverter Generator is built for homeowners, RV travelers, and jobsite crews needing clean, reliable power with fuel versatility. Running on standard gasoline or liquid propane straight out of the box, it delivers 4,000 starting watts and 3,200 running watts on gas, and 3,600 starting watts / 2,900 running watts on propane. Equipped with electric push-button start and manual recoil backup, the WH03242 is driven by a 193cc FIRMAN Max-Pro commercial 4-stroke OHV engine with a cast iron cylinder sleeve and low-oil automatic shutdown. Delivering pure sine wave electricity with less than 3% Total Harmonic Distortion (THD), it is completely safe for sensitive electronics such as laptops, smart televisions, and medical equipment. The control panel features a 120V 30A TT-30R RV-ready receptacle, one 120V 20A duplex outlet, a 12V 8.3A DC automotive outlet, and USB charging ports. Built-in folding handle, flat-free rubber wheels, and parallel capability make this one of the most capable portable generators on the market.
Runs on standard gasoline or liquid propane (LPG); includes quick-connect propane hose and regulator in the box. Clean Pure Sine Wave (<3% THD): Inverter electronics deliver ultra-clean harmonic power safe for smart TVs, phones, computers, and medical equipment.
Directly powers standard 30-amp RV air conditioning and camper systems without requiring adapters.
Integrated folding handle and 5.5-inch flat-free rubber wheels make rolling over lawn and gravel effortless.
| Specification | Rating / Value |
|---|---|
| Starting Watts (Gas / LPG) | 4,000 W / 3,600 W |
| Running Watts (Gas / LPG) | 3,200 W / 2,900 W |
| Engine Displacement | 193cc FIRMAN Max-Pro 4-Stroke OHV with Cast Iron Sleeve |
| Starting System | Electric push button start & manual recoil backup |
| Fuel Tank Capacity | 1.8 Gallons (6.8 Liters) |
| Run Time @ 25% Load | Up to 9.0 hours on gasoline; up to 10 hours on 20 lb propane tank |
| Noise Level | 58 dB at 23 ft (Whisper quiet) |
| Specification | Rating / Value |
|---|---|
| THD Rating | < 3% Pure Sine Wave |
| Outlets | 1x 120V TT-30R (30A RV), 1x 120V 5-20R Duplex (20A), 1x 12V DC, 1x USB (5V 2.1A) |
| Dimensions (L × W × H) | 23.2" × 17.8" × 17.9" |
| Dry Weight | 94.0 lbs (42.6 kg) |
| Certifications | EPA and CARB Certified (50-State legal) |
| Warranty | 3-Year Limited Manufacturer Warranty |
Every order dispatches directly from 5800 Industrial Blvd, Dallas, TX 75207 with full commercial cargo insurance and residential hydraulic liftgate unloading included at $0 extra charge.
Factory seal verified, pallet-strapped, and booked with regional LTL carrier within 1 business day.
Carrier tracking link and serialized 3-Year Warranty documentation emailed immediately on pickup.
Destination terminal calls ahead to confirm your residential driveway or jobsite delivery window.
Driver lowers the palletized crate smoothly to ground level — no loading dock or forklift required.
Ordered the Firman Wh03242 Dual Fuel Inverter Generator 3200W 4000W after getting tired of sitting in the dark during Gulf storms. Freight delivery arrived on a liftgate truck right onto my concrete driveway. Hooked it into our manual transfer switch with a 50A cord and ran our central 4-ton AC, two refrigerators, well pump, and all household lights. Electric start fired right up on fuel.
Driver called me 24 hours ahead of time to coordinate delivery. Unit was bolted onto a heavy pallet and wrapped securely. Added oil, connected fuel source, and pushed the start button. Purrs like a kitten and the digital meter makes monitoring voltage and hours simple. Couldn't ask for a better machine at this price point.
The fuel versatility on this Firman Wh03242 Dual Fuel Inverter Generator 3200W 4000W was the main selling point for me. Being able to connect directly to propane or natural gas means no more storing 50 gallons of stale gasoline in the garage. Build quality is solid industrial grade and the frame feels bulletproof.
Tested the wireless remote start from about 80 feet away through the back patio door—started immediately. It is surprisingly quiet for an engine of this displacement. Very impressed with the packaging and complete hardware kit included.
Need transfer-switch sizing, natural gas BTU flow, or liftgate scheduling confirmed before ordering? Talk directly with our Dallas equipment desk.
Yes. With 4,000 starting watts and a dedicated 30A TT-30R RV receptacle, it easily starts and runs standard 13,500 BTU and 15,000 BTU RV rooftop air conditioners.
It features an onboard 12V battery and a push-button start switch right on the front control panel. A manual recoil pull start is also provided as backup.
Yes. It features built-in parallel ports that connect to another FIRMAN inverter with an optional parallel kit to provide up to 50 amps of continuous power.
At 25% load, it produces just 58 decibels at 23 feet, allowing normal conversation right next to the unit.
Yes. Propane does not gum up the carburetor like old gasoline does, making it the ideal fuel for standby emergency readiness.
Free residential liftgate delivery across the 48 contiguous states with 30-day money back returns and full manufacturer warranty support.
Every order ships free from our Dallas, TX regional depot (5800 Industrial Blvd). Heavy crated generators and commercial machines ship via insured LTL freight with a scheduled 24-hour advance phone call and free hydraulic liftgate lowering onto your driveway or curb.
Groundmark acquires unclaimed and over-allocated commercial contractor freight consignments directly into our Dallas warehouse. Every unit is 100% factory-sealed with 0.0 runtime hours and covered by our serialized 3-Year Commercial Warranty.
