What Is a Portable Generator?
A portable gasoline generator is an engine-driven power unit that produces AC electricity on demand. Unlike standby generators, portable units are not permanently installed. You wheel them outside, add fuel, and connect your appliances via extension cords or a transfer switch. They are the most widely available and cost-effective option for emergency home backup, job sites, camping, and outdoor events.
How Much Power Do You Actually Need?
Add up the running watts of every appliance you plan to power at the same time. Then add the highest single starting-watt surge to that total. That sum is your minimum generator size. Common appliances and approximate wattages:
- Refrigerator: 150-400 running watts, 800-1,200 starting watts
- Sump pump (1/2 HP): 800 running watts, 1,300 starting watts
- Window AC (10,000 BTU): 900-1,200 running watts, 1,800 starting watts
- Furnace blower: 300-500 running watts, 700 starting watts
- Lights, phone chargers, TV: 100-300 watts combined
A 5,000-watt generator covers essential circuits for most homes. A 7,500-watt unit handles a window AC unit on top of basics. Size up if you run power tools or a well pump simultaneously.
Dual Fuel vs. Gasoline Only
Gasoline-only generators typically cost less upfront and are simpler to operate. They are the right choice when gasoline is readily available and you primarily need maximum wattage output.
Dual fuel models run on either gasoline or liquid propane. Propane stores indefinitely, which matters during extended emergencies when gas stations run dry. Expect 10-15% less output on propane compared to gasoline, but the fuel flexibility is worth it for preparedness-focused buyers.
Runtime, Tank Size, and Fuel Efficiency
Runtime is always stated at a percentage of load. A generator rated for 8 hours at 50% load will run shorter if you push it to full capacity. Larger tanks mean fewer refueling stops during long outages. Match tank size to your expected usage window. A 5-6 gallon tank covers a full night without a mid-sleep refuel.
- 1-2 gallon tanks: 8-12 hours - ideal for camping and light use
- 4-6 gallon tanks: 8-10 hours at 50% load - home backup standard
- Never add fuel to a running generator - let it cool first
What to Look for in a Portable Generator
- Outlets: Look for GFCI-protected 120V outlets, a 120/240V twist-lock for large loads, and a 30A RV outlet if needed
- CO Shutdown: Automatic carbon monoxide sensors shut the unit off before dangerous levels build up indoors or in semi-enclosed spaces
- Wheel Kit: Never-flat tires and a foldable handle make a 150-200 lb unit manageable across rough terrain
- CARB Compliance: Required in California and several other states - check your state regulations before purchasing
- Electric Start: A key or button start removes the physical effort of a recoil cord, especially useful in cold weather
- Low Oil Shutdown: Protects the engine from damage when oil drops below a safe level
Brands We Carry
Our gasoline generator selection includes Pulsar, Simpson, Ford, AIMS Power, and Cummins. Each brand is stocked as an authorized dealer, meaning full manufacturer warranty coverage on every purchase.
- Pulsar: Reliable value-oriented generators with CARB approval and dual fuel options across the lineup
- Simpson: Industrial-grade portable generators with CRX engines, roll cage protection, and 3-year consumer warranties
- Ford: Portable generators with Switch & Go dual fuel technology and remote start capability
- AIMS Power: Compact gasoline generators for light-duty portable power needs
Why Buy From Mighty Generators
- Authorized dealer for every brand we sell - full manufacturer warranty, no fine print
- Free shipping and free returns on all orders, no minimums
- 0% APR financing options available through Klarna
- No restocking fees - ever
- Expert support 7 days a week from a team that knows generators, not just order forms
