Generac GP8000E COsense (7715, 49ST/CSA) review: our full analysis
Brand: Generac · Ranked 36th of 174 · Our methodology
7.6/10 Power8.6 Runtime9.0 Noise— Features6.9 Portability6.0 Watts per dollar8.6 Dotted line: average of the 174 models. Relative scores based on specs, no hands-on testing. Where to buy Today's best priceTypical price: $800–$1,200 Check best price Affiliate link: As an Amazon Associate we earn from qualifying purchases.Not clearly published by the manufacturer, take with caution: noise level.
Pros
- 8,000 running watts, with PowerRush raising starting capacity to 10,000 W.
- L14-30R 30 A outlet for HomeLink transfer switches plus two GFCI 120V 20A duplexes.
- Up to 10 hours at 50% load on a 7.9-gallon tank; electric start with wall charger.
Cons
- 198 lb on wheels.
- Gasoline only.
- 49-state/CSA version: not for sale in California.
Best for
- Home backup through a transfer switch or an interlock kit
Specifications
| Type | Gas (open frame) |
|---|---|
| Running watts | 8,000 W gasoline |
| Starting watts | 10,000 W gasoline |
| Fuel | Gasoline |
| Fuel tank | 7.9 gal |
| Runtime | 15 hours at 25% load · 10 hours at 50% load |
| Noise | Not published |
| Weight | 198.0 lb |
| Outlets | 4 × 120 V household outlets (5-20R) · L14-30R 30 A 120/240 V twist-lock |
| Transfer switch ready | Yes |
| Start | Electric push-button + recoil |
| CO shutoff sensor | Yes |
| Parallel capable | No |
| Emissions | EPA compliant |
| Engine | 420 cc |
| Warranty | 3 years |
Generac GP8000E COsense (7715, 49ST/CSA)8,000 running W · Gas · typical price $800–$1,200
Check price and availability
Who is it for?
The Generac GP8000E COsense (7715, 49ST/CSA) is mostly suited to:
- Home backup through a transfer switch or an interlock kit.
8,000 running watts: what can it power?
The Generac GP8000E COsense (7715, 49ST/CSA) delivers 8,000 W continuously and up to 10,000 W for a few seconds to start motors. 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 GP8000E COsense (7715, 49ST/CSA)8,000 running W · Gas · typical price $800–$1,200
Check best price
How long does it run on a tank?
The fuel tank holds 7.9 gallons of gasoline. The manufacturer quotes 15 hours at a quarter load. At half load, it runs about 10 hours on a full tank. That is about 0.79 gallon per hour at half load, or 19 gallons for a full day of running, so plan your fuel storage for a multi-day outage.
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.
Outlets: home, RV and tools
Its panel offers 4 × 120 V household outlets (5-20R), L14-30R 30 A 120/240 V twist-lock. The L14-30R 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.
Start type, CO shutoff 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 EPA compliant; check California availability if you live there. The warranty runs 3 years (residential use).
Typical price $800–$1,200: good value per watt?
Relative to its running watts, the Generac GP8000E COsense (7715, 49ST/CSA) scores 8.6/10 on value: a good result. Generator prices on Amazon move a lot, especially before hurricane season: check the current price before you buy.
Generac GP8000E COsense (7715, 49ST/CSA)8,000 running W · Gas · typical price $800–$1,200
Check best price
Our verdict on the Generac GP8000E COsense (7715, 49ST/CSA)
The Generac GP8000E COsense (7715, 49ST/CSA) scores 7.6/10 and ranks 36th out of 174 generators analyzed. Its strengths: 8,000 running watts, with PowerRush raising starting capacity to 10,000 W; L14-30R 30 A outlet for HomeLink transfer switches plus two GFCI 120V 20A duplexes. It is best suited to home backup through a transfer switch or an interlock kit.
Generac GP8000E COsense (7715, 49ST/CSA)8,000 running W · Gas · typical price $800–$1,200
Check best price
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 GP8000E COsense (7715, 49ST/CSA) run a refrigerator?
Yes: its 8,000 running watts and 10,000 starting watts cover a full-size fridge, including the compressor's startup surge.
Can the Generac GP8000E COsense (7715, 49ST/CSA) power a house?
It can back up the essentials through a transfer switch or interlock kit connected to its L14-30R outlet.
How long does the Generac GP8000E COsense (7715, 49ST/CSA) run on a tank?
About 10 hours at half load according to the manufacturer, and 15 hours at a quarter load.
Does the Generac GP8000E COsense (7715, 49ST/CSA) run on propane?
No, it runs on gasoline only.
Is the Generac GP8000E COsense (7715, 49ST/CSA) quiet?
The manufacturer does not publish a noise rating.
Generac GP8000E COsense (7715, 49ST/CSA)8,000 running W · Gas · typical price $800–$1,200
Check best price
Generac GP8000E COsense (7715, 49ST/CSA)7.6/10 · $800–$1,200
Check best price
Other Generac generators
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 →
6.5
Dual fuel inverter
Generac · Dual fuel inverter
Generac iQ5200 DF (G0089450, 49ST)
3,900 W
107 lbCO
$800–$1,200Read the review →
Same price range, other brands
DuroStar · Dual fuel
DuroStar DS13000MX
10,500 W
74 dB(A)209 lbCO
$800–$1,200Read the review →
8.2
Best value
Westinghouse · Dual fuel
Westinghouse WGen10500DFc
10,500 W
74 dB(A)230 lbCO
$800–$1,200Read the review →
8.0
Best value
Pulsar · Dual fuel
Pulsar G12KBN
9,500 W
74 dB(A)209 lb
$800–$1,200Read the review →