WEN DF450i
Generator · WEN Super Quiet Dual Fuel. Specs from the manufacturer page (checked ).

The WEN DF450i is a dual-fuel portable inverter generator rated for 3500 running watts and 4500 surge watts on gasoline, or 3150 running watts on propane. Its 2.2-gallon tank provides up to 8.5 hours of half-load run time, and it operates at 58 dBA at quarter load, measured at 22 feet. It comes with a three-year limited warranty.
Key features
- Dual fuel: on gasoline, 4500 surge watts and 3500 rated watts; on propane, 4500 surge watts and 3150 rated watts
- Auto Fuel Selection Technology switches from propane to gasoline for longer run times
- Up to 8.5 hours of half-load run time on the 2.2-gallon tank (9 hours on a 20-pound LPG tank)
- 58 dBA at quarter load, 22 feet
- Two 3-prong 120V receptacles, one 120V 30A NEMA TT-30R RV receptacle, one 12V DC receptacle, and 5V USB port(s) (the page lists both one and two)
- Eco-Mode switch adjusts fuel consumption as loads are plugged in and unplugged
- Fuel shut-off, plus low-oil and low-fuel automatic shutdown and overload protection
- Parallel operation with two units via a WEN Parallel Connection Kit (sold separately)
What it is for
- Back-up power
- RV use
- Camping
- Hunting
Specifications
| Running watts | 3500 W |
|---|---|
| Peak / surge | 4500 W |
| Fuel | dual-fuel |
| Tank | 8.3 L (2.2 gal) |
| Run time at 50 % load | 8.5 h |
| Noise | 58 dB |
| AC output voltage | 120V |
| Warranty | 3 years |
From the WEN page. Values the manufacturer does not publish are left out.
What is in the box
- Spark arrestor
Similar inverter & portable generators
Anker SOLIX Smart Generator 5500
Pulsar GD400BN
Champion 5500-Watt Dual Fuel Inverter
Firman W03383
Champion 3500-Watt Dual Fuel RV Ready (100307)
Firman WH03562OF
A-iPower SUA4300i
WEN DF450i comparisons
- DF450i vs Generac iQ5200
- DF450i vs Anker SOLIX Smart Generator 5500
- DF450i vs Pulsar GD400BN
- DF450i vs Champion 5500-Watt Dual Fuel Inverter
- DF450i vs Firman W03383
Connection and wiring
Follow the diagrams in the WEN manual. Connecting to a home panel needs a transfer switch or interlock and a licensed electrician.
- Parallel connection, manual page 2 →
- Parallel connection, manual page 11 →
- Parallel connection, manual page 26 →
Error codes and troubleshooting
We found no error-code table in this manual. Its troubleshooting section is the reference.
FAQ
How long does the WEN DF450i run on a tank?
The maker rates it at 8.5 hours at 50 % load (about 1,750 W) on a 2.2-gal tank. A light load such as a refrigerator and lights runs longer; a full load runs shorter.
Can the WEN DF450i start a sump pump or well pump?
Starting surge matters more than running watts: this unit is rated 4500 W peak. That covers a typical 1/2 HP sump pump (about 2150 W to start). Use the calculator with your exact pump.