Large inverter (6,000 W+ running)
Westinghouse iGen12000DFc 12000 Peak Watt Dual Fuel Inverter Generator
A 9,000-running-watt dual fuel inverter with both a 14-50R and an L14-30R at 120/240 V — enough for the essentials tier of a whole house, fed through a transfer switch or interlock.
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Best for
Home backup of the essentials — fridge, freezer, furnace blower, well or sump pump — through a transfer switch
Specifications
| Output (gasoline) | 9,000 W running / 12,000 W peak |
|---|---|
| Output (propane) | 8,100 W running / 11,000 W peak |
| Voltage | 120/240 V; 37.5 A running at 240 V on gasoline |
| Outlets | 120/240 V 14-50R (50 A), 120/240 V L14-30R (30 A), 120 V 5-20R GFCI duplex |
| Transfer switch | Both 240 V outlets transfer-switch / interlock-kit ready (Westinghouse) |
| Neutral | Bonded |
| CO shutoff | CO sensor — shuts the generator down if dangerous CO levels are detected nearby |
| Parallel | With 240 V Westinghouse inverter models (240 V parallel cables sold separately) |
| Run time | 19 hr at 25% load on 7.9 gal gasoline; 9 hr at 25% on a 20 lb propane tank |
| Noise | As low as 64 dBA (distance not stated) |
| Start | Electric, remote key fob, recoil |
| Weight | 189 lb dry, wheel kit included |
| Emissions | EPA compliant; not CARB compliant |
| Warranty | 3-year limited residential, 1-year commercial |
Specifications as published by Westinghouse. Confirm against the current spec sheet before buying — manufacturers revise models without renaming them.
What's good
- 9,000 running watts on gasoline covers the 5,000–7,500 W essentials tier with room for a window AC
- Two 240 V outlets — a 14-50R and an L14-30R — so it fits either a 50 A or a 30 A inlet box
- Still 8,100 running watts on propane, the fuel that stores for years without stabilizer
- 7.9-gallon tank: Westinghouse rates it at 19 hours at quarter load
What's not
- 189 lb — wheeled, but it lives where it runs
- Ships with a bonded neutral: through an interlock kit or a transfer switch that doesn't switch the neutral that is a second neutral-ground bond, and the installer has to resolve it
- Not CARB compliant — not a California option
- Not a central-AC machine — a 2 to 2.5-ton compressor can surge 8,000–13,000 W on its own
Our verdict
This is the inverter that reaches the whole-house essentials tier: 9,000 running watts clears the 5,000–7,500 W a typical 1,500 sq ft home needs for its essentials, with headroom for a window AC and the clean output inverters are bought for. Both 240 V outlets mean it can feed a 30 A or a 50 A inlet, but have the electrician deal with the bonded neutral before the first outage. Run it outside, at least 20 feet from the house with the exhaust pointed away.
Compare with the alternatives
- Honda EU2200i (EU2200ITAN) — a refrigerator, internet and electronics through an outage, or quiet power at a campsite
- WEN DF680iX — furnace blower, fridge and sump pump in an outage, or an rv with one air conditioner
- Champion 8500W Wireless Start Tri Fuel Inverter (201537) — homes with natural gas or a large propane tank that want an inverter instead of a standby unit
- Honda EU7000iS — quiet, transfer-switch-ready 240 v backup for essentials when reliability matters more than watts per dollar
- Westinghouse iGen2550DFc — a fridge and essentials on propane, or light use in a 30 a rv