Generac GP8000E
#10 in Mid-sizeFull review
A gasoline generator for backing up most of a home’s essentials through a 30 A transfer switch at a low price. Buyers who want propane should look at a dual-fuel model.
Amazon $1,049$1,049
3.9/5
A fuel-injected gasoline generator for backing up a home’s essentials through a 30 A transfer switch, and the GP8000E to buy in California. Elsewhere the carbureted GP8000E does the same job for less.
- 8,000 / 10,000 WRunning / starting
- GasolineFuel
- 12 hr at 50% loadRun time
- Yes, 240 VTransfer switch
- 207 lbWeight
- $0.16Price / W
Check price at Amazon$1,299
Price checked October 28, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- Enough power for a well pump, furnace and fridge through a transfer switch
- Fuel injection starts easily and runs about 12 hours on a tank at half load
- Sold in all 50 states, including California
- Shuts itself off if carbon monoxide builds up nearby
Cons
- Gasoline only
- Only a 30 A twist-lock for the house, no 50 A outlet
- Costs about $250 more than the carbureted GP8000E
The Generac GP COsense family
Every Generac GP COsense model we rank, smallest first. Ratings compare each against its own size.
| Model | Running / starting | Rating | Price |
|---|---|---|---|
| Generac GP3600 | 3,600 / 4,500 W | 3.4/5 | $549 |
| Generac GP6500E | 6,500 / 8,125 W | 4.0/5 | $899 |
| Generac GP8000E | 8,000 / 10,000 W | 3.9/5 | $1,049 |
| Generac GP8000E EFI (this one) | 8,000 / 10,000 W | 3.9/5 | $1,299 |
How it scores
The rating comes from 7 measured or published factors, each scored 0-100 against fixed reference points for its size. How we rank explains each one.
Specifications
| Model number | GP8000E 50ST (model 8929, G0089290) |
|---|---|
| Output | |
| Gasoline | 8,000 W running, 10,000 W starting |
| Outlets | 4 × 120 V, L14-30 |
| Transfer switch ready | Yes, 240 V |
| Full power at 120 V | No |
| Price per watt | $0.16 |
| Fuel and run time | |
| Fuel | Gasoline |
| Tank | 7.9 gal |
| Run time (gasoline) | 12 hr at 50% load |
| Engine | 420 cc |
| Noise and safety | |
| CO shutoff | Yes |
| CARB compliant | Yes |
| Build | |
| Starting | Electric and recoil |
| Wheels | Yes |
| Dimensions | 30.2 x 27.2 x 26.5 in |
| Weight | 207 lb |
| Warranty | 3 years |
| Released | 2025-03 |
Alternatives in this size
WEN DF1100T
#11 in Mid-sizeFull review
A mid-size dual-fuel generator for feeding a 50 A transfer switch on a budget, though the CO-sensing DF1100X is the safer pick.
Amazon $849$849
Generac GP5500E EFI
#13 in Mid-sizeFull review
A mid-size gasoline generator with fuel injection for buyers who want an easy start after months in storage, and the pick for California. Others get more watts per dollar.
Amazon $1,099$1,099
Compare
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