Generac generators: reviews and lineup comparison
Generac, the home standby leader, also makes portable generators: GP open frames for home backup and iQ and GP inverters, many with the CO-Sense shutoff.
- Best overall: Generac GP9500E Tri Fuel (8063, 49ST). The highest overall score in this list (8.0/10).
- Most watts per dollar: Generac GP8000E COsense (7715, 49ST/CSA). 8,000 running watts in the $800–$1,200 price range.
- Quietest: Generac GP2500i (82512, 49ST). Rated at 53 dB(A) by its manufacturer.
- Longest runtime: Generac iQ3800 DF (G0089440, 49ST). About 13 hours at half load on a 3.3 gal tank.
- Most powerful: Generac GP9500E Tri Fuel EFI (8061, 50ST). 9,500 running watts, 12,500 starting.
- Lightest: Generac GP3300i (71532, 49ST). 61.0 lb for 2,500 running watts.
Generac · Tri fuel
Generac GP9500E Tri Fuel (8063, 49ST)
9,500 W
219 lbCO
$800–$1,200Read the review →
7.9
Tri fuel
Generac · Tri fuel
Generac GP9500E Tri Fuel EFI (8061, 50ST)
9,500 W
227 lbCO
$1,200–$1,800Read the review →
7.6
CO shutoff
Generac · Dual fuel
Generac GP6700E DF (G0080623, 49ST)
6,700 W
181 lbCO
$800–$1,200Read the review →
7.6
CO shutoff
Generac · Gas
Generac GP8000E COsense (7715, 49ST/CSA)
8,000 W
198 lbCO
$800–$1,200Read the review →
6.5
Dual fuel inverter
Generac · Dual fuel inverter
Generac iQ5200 DF (G0089450, 49ST)
3,900 W
107 lbCO
$800–$1,200Read the review →
6.3
Dual fuel inverter
Generac · Dual fuel inverter
Generac iQ3800 DF (G0089440, 49ST)
3,000 W
107 lbCO
$800–$1,200Read the review →
6.0
Whisper quiet
Generac · Gas inverter
Generac GP2500i (82512, 49ST)
2,200 W
53 dB(A)48 lbCO
$500–$800Read the review →
5.2
CO shutoff
Generac · Gas inverter
Generac GP3300i (71532, 49ST)
2,500 W
61 lbCO
$800–$1,200Read the review →
No generator matches these filters.
As an Amazon Associate we earn from qualifying purchases. Typical price ranges observed in November 2026.
What stands out in the Generac lineup?
We analyzed 8 Generac generators sold on Amazon.com, from 2,200 to 9,500 running watts. Their average score is 6.9/10, versus 6.9/10 for the whole catalogue.
- Highest rated: Generac GP9500E Tri Fuel (8063, 49ST) (8.0/10).
- Lightest: Generac GP2500i (82512, 49ST) (48.0 lb).
- Most powerful: Generac GP9500E Tri Fuel (8063, 49ST) (9,500 running watts).
- Inverters: 4 of 8. Dual or tri fuel: 5. CO shutoff: 8.
Frequently asked questions
What is the best Generac generator?
In our comparison, the Generac GP9500E Tri Fuel (8063, 49ST) earns the highest score in the lineup (8.0/10), with 9,500 running watts. The right pick still depends on your use: the lineup ranges from 2,200 to 9,500 running watts.
Does Generac make dual fuel generators?
Yes, 5 of the 8 Generac models we analyzed run on gasoline or propane.
Do Generac generators have a CO shutoff sensor?
8 of the 8 Generac models we analyzed list a carbon monoxide shutoff.
Where can I buy a Generac generator?
Every model listed here is sold on Amazon.com, many by the brand's official store or by Amazon itself. Check the seller and the warranty shown on the listing before you buy.