Best overall in portable and inverter generators
An 8,000 W generator with COsense and an L14-30R for a transfer switch, in Generac's 49ST/CSA configuration.
Our score: 8.0/10 out of 10Researched, not lab-tested
- Running watts
- 8,000 W
- Fuel
- Gasoline
- Starting watts
- 10,000 W
- Largest outlet
- 120/240 V 30 A (L14-30R)
The 2026 Generac recall: check the model number. In April 2026 Generac and CPSC, with Health Canada, recalled portable generators whose carburetor can leak fuel the first time they are filled (CPSC recall 26-407). The GP8000E models on that list are G0077150, G0076754 and G0081540, within a limited serial range, sold from May 2025 to February 2026. The model on this page, G0077151, is not on the list. Some stores describe the generator only as “7715”, which could be either number, so read the model and serial on the label on the side of the unit, or ask the seller, before you buy. If you already own one of the listed models, CPSC’s notice links Generac’s serial-number check.
Is it right for you?
Pros
- COsense shuts the engine down if CO builds up
- 8,000 running / 10,000 starting watts
- 120/240 V L14-30R for an inlet or transfer switch
- CSA configuration for Canada (Generac's 49ST/CSA)
Cons
- Gasoline only: stored fuel needs stabiliser and rotation
- No noise rating published by Generac
- Best for
- Detached homes, Canadian ones included, that want to run a furnace, well pump or several circuits through a properly installed transfer switch or interlock.
- Not for
- Anyone who wants propane or quiet running, a generator to carry by hand (198 lb), or California buyers (the 50-state model is 7676).
Our verdict
This is the portable we would short-list first for a detached home that wants to run hardwired circuits in a long outage. G0077151 (model 7715) is the configuration Generac lists as 49ST/CSA, its version for 49 states and Canada. It gives 8,000 running and 10,000 starting watts from a 420 cc engine. Owners’ sizing threads put a furnace blower, fridge and lights at roughly 3,000 to 3,500 W, and a sump pump pushes that towards 5,000 W, so there is headroom for starting surges.
The panel is what makes it a home-backup machine: a 120/240 V 30 A L14-30R twist-lock, the outlet a generator inlet and manual transfer switch expect, plus two GFCI-protected 20 A duplexes. COsense shuts the engine down if carbon monoxide builds up around it. The 7.9 gallon tank lasts about 10 hours at half load, per Generac’s spec sheet.
The trade-offs: it runs on gasoline only, weighs 198 lb, and Generac publishes no noise rating for it. It is an open-frame generator rather than an inverter, and some owners report that high-efficiency furnaces with electronic controls run better on an inverter.
Setup and safety
Outdoors only. Run it at least 6 m (20 ft) from the house, with the exhaust pointed away from doors, windows and air intakes, never in a garage, shed, basement or carport, even with the door open (Health Canada, CPSC). COsense is a backstop, not a reason to run it closer. Keep battery-backed CO alarms inside, outside the bedrooms.
Never plug it into a wall outlet or wire it straight to the panel. That backfeeds the grid and can kill line workers. Either run heavy-duty, outdoor-rated extension cords to the appliances, or have an electrician fit an L14-30 inlet and a transfer switch or the panel maker’s interlock. In most places that also needs a permit or a notice to your utility, sometimes before you buy; rules differ by province and state (see the rules by province and state). Generac’s 6382 manual transfer switch is built for a 30 A generator like this one.
Keeping it ready. Electric start uses an included 12 V battery, kept topped up through a plug-in charger jack, with a recoil cord as backup. It holds about 1 L (1.06 qt) of oil and has an hour meter for service intervals. Owners who regret their generators often mention stale fuel and a unit that would not start in the next storm, so run it now and then and treat stored gasoline with stabiliser.
Specs
Generac GP8000E Portable Generator with COsense (49ST/CSA, G0077151)
Generator output
| Running watts | 8,000 W |
|---|---|
| Starting watts | 10,000 W |
| Fuel | Gasoline |
| Largest outlet | 120/240 V 30 A (L14-30R) |
| Parallel capable | No |
Fuel
| Fuel tank | 7.9 gal |
|---|---|
| Runtime at 50% load | 10 h |
Other details
| CO shutoff | Yes |
|---|---|
| Weight | 198 lb |
| Warranty | 3 years |
| Safety listing | CSA (49ST/CSA configuration, per Generac) |
Maker’s figures, checked 3 Nov 2026.
GP8000E questions
Can I use it in Canada?
Generac lists G0077151 as its 49ST/CSA configuration, the one meant for 49 states and Canada. Look for the CSA mark on the unit’s rating label to be sure. The safety rules above still apply: outdoors only, and no connection to house wiring without a transfer switch.
Will it run my whole house?
Not everything at once. Through a whole-panel transfer switch it can feed any circuit, but you choose what runs by switching breakers off, because 8,000 running watts won’t cover an electric range, water heater and central air together. Furnace, fridge, sump pump, lights and a well pump are the usual essentials list.