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
The Generac GP8000E and the Generac GP8000E EFI are evenly matched, rated 3.9 and 3.9. The Generac GP8000E leads on value. The Generac GP8000E EFI wins on run time. The Generac GP8000E costs $250 less ($1,049 vs $1,299).
Generac GP8000E EFI
#12 in Mid-sizeFull review
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.
Amazon $1,299$1,299
Prices were last checked October 28, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Which should you buy?
- Choose the Generac GP8000E for value ($0.13 per running watt vs $0.16 per running watt).
- Choose the Generac GP8000E EFI for run time (12 hours on a tank at 50% load vs 10 hours on a tank at 50% load).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every mid-size portable generator; a clear win is highlighted. How we rank explains each one.
| Factor weight | Generac GP8000E | Generac GP8000E EFI |
|---|---|---|
| Overall rating | 3.9/5 | 3.9/5 |
| Value 30% | 80 $0.13 per running watt | 66 $0.16 per running watt |
| Run time 15% | 60 10 hours on a tank at 50% load | 80 12 hours on a tank at 50% load |
| Fuel options 15% | 0 gasoline only | 0 gasoline only |
| Home hookup 15% | 100 240 V outlet for a transfer switch | 100 240 V outlet for a transfer switch |
| CO safety 10% | 100 shuts off when carbon monoxide builds up | 100 shuts off when carbon monoxide builds up |
| Warranty 10% | 67 3-year warranty | 67 3-year warranty |
| Starting 5% | 80 push-button electric start | 80 push-button electric start |
Specifications
| Generac GP8000E | Generac GP8000E EFI | |
|---|---|---|
| Output | ||
| Gasoline | 8,000 W running, 10,000 W starting | 8,000 W running, 10,000 W starting |
| Outlets | 4 × 120 V, L14-30 | 4 × 120 V, L14-30 |
| Transfer switch ready | Yes, 240 V | Yes, 240 V |
| Full power at 120 V | No | No |
| Price per watt | $0.13 | $0.16 |
| Fuel and run time | ||
| Fuel | Gasoline | Gasoline |
| Tank | 7.9 gal | 7.9 gal |
| Run time (gasoline) | 10 hr at 50% load | 12 hr at 50% load |
| Engine | 420 cc | 420 cc |
| Noise and safety | ||
| CO shutoff | Yes | Yes |
| CARB compliant | No | Yes |
| Build | ||
| Starting | Electric and recoil | Electric and recoil |
| Wheels | Yes | Yes |
| Dimensions | 27.2 x 27 x 26.5 in | 30.2 x 27.2 x 26.5 in |
| Weight | 198 lb | 207 lb |
| Warranty | 3 years | 3 years |
| Released | 2023-12 | 2025-03 |