Generac GP9500E Tri Fuel EFI (8061, 50ST) review: our full analysis
Brand: Generac · Ranked 16th of 174 · Our methodology
7.9/10 Power9.2 Runtime9.2 Noise— Features8.2 Portability6.3 Watts per dollar8.2 Dotted line: average of the 174 models. Relative scores based on specs, no hands-on testing. Where to buy Today's best priceTypical price: $1,200–$1,800 Check best price Affiliate link: As an Amazon Associate we earn from qualifying purchases.Not clearly published by the manufacturer, take with caution: propane running watts, runtime, noise level.
Pros
- Electronic fuel injection on a 500cc engine: 10.5 hours at 50% load on gasoline.
- 9,500 running W on gasoline, 8,550 on propane, 7,000 on natural gas.
- 14-50R and L14-30R outlets, HomeLink transfer switch compatible; 50-state version.
Cons
- 227 lb on wheels.
- Only one 120V 20A GFCI duplex.
Best for
- RVs and travel trailers, through its 14-50R outlet
- Home backup through a transfer switch or an interlock kit
- Running most of a house, well pump included
Specifications
| Type | Tri fuel (open frame) |
|---|---|
| Running watts | 9,500 W gasoline · 8,550 W propane · 7,000 W natural gas |
| Starting watts | 12,500 W gasoline · 12,500 W propane · 9,000 W natural gas |
| Fuel | Gasoline, propane, natural gas |
| Fuel tank | 7.5 gal |
| Runtime | 14 hours at 25% load · 10 hours at 50% load |
| Noise | Not published |
| Weight | 227.0 lb |
| Outlets | 2 × 120 V household outlets (5-20R) · L14-30R 30 A 120/240 V twist-lock · 14-50R 50 A 120/240 V |
| Transfer switch ready | Yes |
| Start | Electric push-button + recoil |
| CO shutoff sensor | Yes |
| Parallel capable | No |
| Emissions | CARB and EPA compliant |
| Engine | 500 cc |
| Warranty | 3 years |
Generac GP9500E Tri Fuel EFI (8061, 50ST)9,500 running W · Tri fuel · typical price $1,200–$1,800
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Who is it for?
The Generac GP9500E Tri Fuel EFI (8061, 50ST) is mostly suited to:
- RVs and travel trailers, through its 14-50R outlet.
- Home backup through a transfer switch or an interlock kit.
- Running most of a house, well pump included.
What will a 12,500-watt generator run?
The Generac GP9500E Tri Fuel EFI (8061, 50ST) delivers 9,500 W continuously and up to 12,500 W for a few seconds to start motors on gasoline. On propane, the manufacturer rates it at 8,550 running watts (12,500 W starting), 10% less. On natural gas: 7,000 running watts (9,000 W starting). It handles 14 of the 14 loads on our typical list one at a time; add up the running watts of everything you run together, plus the extra starting watts of the biggest motor.
| Appliance | Running / starting watts | Will it run? |
|---|---|---|
| Wi-Fi router and modem | 20 W / 20 W | ✅ Yes |
| CPAP (no humidifier) | 50 W / 50 W | ✅ Yes |
| Laptop or TV | 150 W / 150 W | ✅ Yes |
| Full-size refrigerator | 700 W / 2,200 W | ✅ Yes |
| Chest freezer | 500 W / 1,500 W | ✅ Yes |
| Furnace blower (1/2 HP) | 800 W / 2,350 W | ✅ Yes |
| Sump pump (1/2 HP) | 1,050 W / 2,150 W | ✅ Yes |
| Microwave (1,000 W) | 1,000 W / 1,000 W | ✅ Yes |
| Space heater | 1,500 W / 1,500 W | ✅ Yes |
| Window AC (10,000 BTU) | 1,200 W / 3,600 W | ✅ Yes |
| RV roof AC (13,500 BTU) | 1,800 W / 2,800 W | ✅ Yes |
| Circular saw | 1,400 W / 2,300 W | ✅ Yes |
| Well pump (1 HP, 240 V) | 1,000 W / 4,000 W | ✅ Yes |
| Central AC (3-ton, soft start) | 3,800 W / 5,500 W | ✅ Yes |
Typical figures; check the label of your own appliances. One load at a time: add up everything you run together.
Generac GP9500E Tri Fuel EFI (8061, 50ST)9,500 running W · Tri fuel · typical price $1,200–$1,800
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Fuel tank and runtime
The fuel tank holds 7.5 gallons of gasoline. The manufacturer quotes 14 hours at a quarter load. At half load, it runs about 10 hours on a full tank. That is about 0.71 gallon per hour at half load, or 17 gallons for a full day of running, so plan your fuel storage for a multi-day outage. On propane, a standard 20 lb tank holds about 4.7 gallons of LP; propane does not go stale, which makes it the easiest fuel to stock.
Noise level
The manufacturer does not publish a noise figure for this model. Open-frame generators of this size typically run around 70 to 76 dB(A) at 23 feet; our noise score treats a missing figure as below average.
Can you connect it to your house?
Its panel offers 2 × 120 V household outlets (5-20R), L14-30R 30 A 120/240 V twist-lock, 14-50R 50 A 120/240 V. The 14-50R outlet supplies 120/240 V, which is what a manual transfer switch or an interlock kit with a power inlet box connects to, installed by a licensed electrician. Never backfeed the house through a wall outlet.
Starting, safety and warranty
It has electric push-button start, with a recoil cord as backup. A CO shutoff sensor stops the engine if carbon monoxide builds up around it; it does not replace distance (20 feet from the house) and CO alarms indoors. It is listed as CARB compliant, so it can be sold in California. The warranty runs 3 years (residential use).
Typical price $1,200–$1,800: good value per watt?
Relative to its running watts, the Generac GP9500E Tri Fuel EFI (8061, 50ST) scores 8.2/10 on value: a good result. Generator prices on Amazon move a lot, especially before hurricane season: check the current price before you buy.
Generac GP9500E Tri Fuel EFI (8061, 50ST)9,500 running W · Tri fuel · typical price $1,200–$1,800
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Our verdict on the Generac GP9500E Tri Fuel EFI (8061, 50ST)
The Generac GP9500E Tri Fuel EFI (8061, 50ST) scores 7.9/10 and ranks 16th out of 174 generators analyzed. Its strengths: electronic fuel injection on a 500cc engine: 10.5 hours at 50% load on gasoline; 9,500 running W on gasoline, 8,550 on propane, 7,000 on natural gas. It is best suited to RVs and travel trailers, through its 14-50R outlet and home backup through a transfer switch or an interlock kit.
Generac GP9500E Tri Fuel EFI (8061, 50ST)9,500 running W · Tri fuel · typical price $1,200–$1,800
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Featured in our rankings
Sources
- Official Generac product page (specifications)
- Amazon.com listing (availability and typical price, November 2026)
Frequently asked questions
Will the Generac GP9500E Tri Fuel EFI (8061, 50ST) run a refrigerator?
Yes: its 9,500 running watts and 12,500 starting watts cover a full-size fridge, including the compressor's startup surge.
Can the Generac GP9500E Tri Fuel EFI (8061, 50ST) power a house?
It can back up the essentials through a transfer switch or interlock kit connected to its 14-50R outlet. With this power, that includes most of a typical house.
How long does the Generac GP9500E Tri Fuel EFI (8061, 50ST) run on a tank?
About 10 hours at half load according to the manufacturer, and 14 hours at a quarter load.
Does the Generac GP9500E Tri Fuel EFI (8061, 50ST) run on propane?
Yes, it is tri fuel: 8,550 running watts on propane and 7,000 on natural gas.
Is the Generac GP9500E Tri Fuel EFI (8061, 50ST) quiet?
The manufacturer does not publish a noise rating.
Generac GP9500E Tri Fuel EFI (8061, 50ST)9,500 running W · Tri fuel · typical price $1,200–$1,800
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Generac GP9500E Tri Fuel EFI (8061, 50ST)7.9/10 · $1,200–$1,800
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