Generac GP6700E DF (G0080623, 49ST) review: our full analysis
Brand: Generac · Ranked 35th of 174 · Our methodology
7.6/10 Power8.2 Runtime9.4 Noise— Features7.7 Portability5.5 Watts per dollar8.5 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: propane running watts, runtime, noise level.
Pros
- 6,700 running watts on gasoline, 6,000 on propane, with a fuel selector that switches without shutdown.
- L14-30R 30 A outlet compatible with Generac HomeLink manual transfer switches, plus two GFCI 120V 20A duplexes.
- 7.5-gallon steel tank, electric start and COsense CO shutdown.
Cons
- 181 lb on wheels.
- No 50 A (14-50R) outlet.
- 49-state version: not for sale in California.
Best for
- Home backup through a transfer switch or an interlock kit
Specifications
| Type | Dual fuel (open frame) |
|---|---|
| Running watts | 6,700 W gasoline · 6,000 W propane |
| Starting watts | 8,250 W gasoline · 7,425 W propane |
| Fuel | Gasoline, propane |
| Fuel tank | 7.5 gal |
| Runtime | 11 hours at 50% load |
| Noise | Not published |
| Weight | 181.0 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 | 340 cc |
| Warranty | 3 years |
Generac GP6700E DF (G0080623, 49ST)6,700 running W · Dual fuel · typical price $800–$1,200
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Who is it for?
The Generac GP6700E DF (G0080623, 49ST) is mostly suited to:
- Home backup through a transfer switch or an interlock kit.
6,700 running watts: what can it power?
The Generac GP6700E DF (G0080623, 49ST) delivers 6,700 W continuously and up to 8,250 W for a few seconds to start motors on gasoline. On propane, the manufacturer rates it at 6,000 running watts (7,425 W starting), 10% less. 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 GP6700E DF (G0080623, 49ST)6,700 running W · Dual fuel · typical price $800–$1,200
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Runtime and fuel
The fuel tank holds 7.5 gallons of gasoline. At half load, it runs about 11 hours on a full tank. That is about 0.68 gallon per hour at half load, or 16 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.
Outlets and home connection
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 GP6700E DF (G0080623, 49ST) scores 8.5/10 on value: a good result. Generator prices on Amazon move a lot, especially before hurricane season: check the current price before you buy.
Generac GP6700E DF (G0080623, 49ST)6,700 running W · Dual fuel · typical price $800–$1,200
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Our verdict on the Generac GP6700E DF (G0080623, 49ST)
The Generac GP6700E DF (G0080623, 49ST) scores 7.6/10 and ranks 35th out of 174 generators analyzed. Its strengths: 6,700 running watts on gasoline, 6,000 on propane, with a fuel selector that switches without shutdown; L14-30R 30 A outlet compatible with Generac HomeLink manual transfer switches, plus two GFCI 120V 20A duplexes. It is best suited to home backup through a transfer switch or an interlock kit.
Generac GP6700E DF (G0080623, 49ST)6,700 running W · Dual fuel · typical price $800–$1,200
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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 GP6700E DF (G0080623, 49ST) run a refrigerator?
Yes: its 6,700 running watts and 8,250 starting watts cover a full-size fridge, including the compressor's startup surge.
Can the Generac GP6700E DF (G0080623, 49ST) 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 GP6700E DF (G0080623, 49ST) run on a tank?
About 11 hours at half load according to the manufacturer.
Does the Generac GP6700E DF (G0080623, 49ST) run on propane?
Yes, it is dual fuel: 6,000 running watts on propane.
Is the Generac GP6700E DF (G0080623, 49ST) quiet?
The manufacturer does not publish a noise rating.
Generac GP6700E DF (G0080623, 49ST)6,700 running W · Dual fuel · typical price $800–$1,200
Check best price
Generac GP6700E DF (G0080623, 49ST)7.6/10 · $800–$1,200
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