Generac 12,500 Starting Watt Tri-Fuel Portable Generator, Electric Start

This tri-fuel portable generator provides heavy-duty power backup for homes, job sites, and RV setups. Built around a 500cc OHV engine, it delivers 9,500 running watts and 12,500 starting watts on gasoline. The standout utility is its fuel flexibility, allowing you to switch between standard gasoline, liquid propane, or a dedicated natural gas line using a selector dial.

For high-demand equipment, the 12,500 starting watts offer a 32 percent surge boost over running capacity, which helps start large loads like central air conditioners, sump pumps, and heavy power tools simultaneously. The integrated automatic voltage regulation continuously balances output voltage so connected appliances run safely without erratic spikes. Operation is straightforward thanks to push-button electric start powered by an included 12V battery, alongside built-in COsense technology that detects rising carbon monoxide and turns the engine off before dangerous levels build up.

The control panel provides flexible connection options, including two 120V 20A GFCI duplex outlets, a 120/240V 30A twist-lock outlet, and a 120/240V 50A covered receptacle. It is also compatible with HomeLink manual transfer switches for clean integration into a home electrical panel. When running on gasoline, the 7.5-gallon tank provides up to 9.5 hours of run time at a 50 percent load and up to 14 hours at a 25 percent load, while natural gas hookups offer virtually continuous runtime.

At 219 pounds, this is a substantial machine that requires mechanical effort to lift, though it includes a steel-tube cradle, 9.5-inch never-flat wheels, and a folding handle to help you roll it into place. Upkeep requires attention as well, with the first oil change scheduled at 20 hours of use and subsequent oil changes needed every 100 hours.

Verdict: This generator is an excellent choice for homeowners and work crews who need massive starting power and versatile fuel options, from gas cans to permanent natural gas lines. It provides dependable high-capacity power and comprehensive outlet connections right out of the box.

• Starting Watts: 12,500 watts (gasoline)
• Running Watts: 9,500 watts
• Engine Displacement: 500cc OHV
• Fuel Tank Capacity: 7.5 gallons
• Weight: 219 lbs
• Wheel Size: 9.5-inch never-flat wheels
• Outlets: Two 120V 20A GFCI duplex, one 120/240V 30A (L14-30R), one 120/240V 50A (14-50R)
• Warranty: 3-year residential / 2-year commercial limited warranty

A great fit if you:

• Need the versatility to run on gasoline, propane, or a residential natural gas line.
• Require strong surge wattage to start multiple large appliances like air conditioners and pumps.
• Want convenient push-button electric starting instead of a manual pull cord.
• Need a direct 50-amp or 30-amp connection for home backup or heavy site equipment.

Consider something else if you:

• Need an ultra-lightweight power source that one person can easily lift into a vehicle.
• Prefer a system that does not require scheduled engine oil changes.

What accessories come in the box?
The package includes engine oil, an LP hose with a regulator, a 12V battery for electric start, and a wheel kit with a folding handle.

How long will it run on a full tank of gasoline?
The 7.5-gallon fuel tank provides up to 9.5 hours of runtime at a 50 percent load and up to 14 hours at a 25 percent load.

What maintenance does the engine require?
The first oil change is due after the initial 20 hours of operation, followed by regular oil changes every 100 hours.

Does it support direct connection to a home electrical panel?
Yes, it features 30A and 50A outlets and is compatible with HomeLink manual transfer switches.