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Choosing between the Pulsar G12KBN, Westinghouse 12500W, and Genkins 11000W for heavy duty dual fuel backup is a serious decision. Each one promises big power, but their real-world specs like rated watts, runtime, and warranty are very different.
If you’re a homeowner needing reliable backup for your whole house or a heavy jobsite, this comparison is for you. I’ve tested the specs to find which generator gives you the most muscle and value for your money, and I’ll break down exactly who should buy which one.
đ Quick Picks â My Top Recommendations
Best Overall: Pulsar G12KBN
Longest 12-hour runtime from an 8-gallon tank and highest 9,500 rated watts on gas â Check Price â
Runner-Up: Westinghouse 12500W
Best warranty at 3 years with a remote start key fob and CO sensor â Check Price â
Best Budget: Genkins 11000W
Cheapest option with a 459cc engine and automatic idle control â Check Price â
I put the key specs of all three generators side by side so you can see exactly how the Pulsar G12KBN, Westinghouse 12500W, and Genkins 11000W stack up against each other.
Full Specs Comparison
| Specification | Pulsar G12KBN Heavy Duty | Westinghouse 12500 Peak W | Genkins 11000 Watt Dual F |
|---|---|---|---|
| Rated Watts | â 9500 | â | 8000 |
| Peak Watts | 12000 | â 12500 | 11000 |
| Fuel Type | Gas & LPG | Gas & Propane | Gasoline & LPG |
| Start Type | Electric Start | Remote Electric Start | Electric Start |
| Weight | â | â | â 196 pounds |
| Voltage | â | â | â 120 volts |
| Output Wattage | â | â | â 8000 |
| Special Features | â | CO Sensor | Auto Idle Control, Digital Display |
| Compliance | â CARB Compliant | â | â |
| RV Ready | â Yes | â | â |
| Transfer Switch Ready | â Yes | â Yes | â |
The biggest difference I see is the Pulsar’s 8-gallon tank giving you 12 hours of runtime, while the Genkins only runs for 6 hours on its 6.6-gallon tank â that’s half the endurance for a smaller fuel load.
Individual Product Breakdown
I put each generator through its paces by looking at the real specs â peak watts, rated watts, runtime, and warranty â to give you the honest truth about which one fits your situation best.
Pulsar G12KBN Heavy Duty Portable Dual Fuel Generator
12,000 Peak W | 9,500 Rated W Gas | 8-Gal Tank | 12 Hrs Runtime
- 12, 000 peak watts/ 9, 500 Rated watts (gasoline) & 10, 800 peak watts...
- Dual fuel capability allows you to choose between gasoline & LPG fuel...
- The 457cc, single cylinder, 4-stroke, air cooled, OHV engine with electric...
This Pulsar G12KBN is the workhorse of the bunch. With 9,500 rated watts on gas and an 8-gallon tank that runs for 12 hours at half load, you get the most endurance here. I really like the 7 outlets including a 50A RV outlet, and the 457cc engine starts easily with the electric start. The only downside is the 1-year warranty is short compared to the competition, but for the power and runtime you get, it’s still my top pick for heavy home backup.
â Pros
- 9,500 rated watts on gas â highest in this comparison
- 12 hours of runtime from an 8-gallon tank
- 7 total outlets including a 120/240V 50A RV outlet
- Includes propane hose and 3-in-1 digital meter
â Cons
- Only a 1-year limited warranty
- Heavy at 0.27 g â listed weight seems like a typo, it’s a big unit
Westinghouse 12500 Peak Watt Dual Fuel Home Backup Portable Generator
12,500 Peak W | 9,500 Rated W Gas | 6.6-Gal Tank | 12 Hrs Runtime
- 9500 Running Watts and 12500 Peak Watts (Gasoline); 8500 Running Watts...
- Features Two GFCI 120V 5â20R 20A Standard Household Receptacle, One...
- Powered by a Heavy Duty 457cc Westinghouse 4-Stroke OHV Engine Featuring a...
The Westinghouse WGen9500DFc is the most polished generator here with a 3-year warranty that blows the others away. I love the remote start key fob for cranking it from inside the house, and the CO sensor adds real peace of mind. It matches the Pulsar with 9,500 running watts on gas, but its 6.6-gallon tank is smaller. It’s the best choice if you want a longer warranty and modern safety features.
â Pros
- 3-year limited warranty â best in this group
- Remote start with included key fob
- CO sensor and automatic low oil shutdown for safety
- 457cc cast iron sleeve engine for durability
â Cons
- 6.6-gallon tank is smaller than the Pulsar’s 8-gallon
- Heavy at 212 pounds
Genkins 11000 Watt Dual Fuel Portable Generator Home Back Up
11,000 Peak W | 8,000 Rated W Gas | 6.6-Gal Tank | 6 Hrs Runtime
- 8,000W Gas / 7,200W LPG Dual Fuel Backup Power â Choose gasoline for...
- 120/240V Ready with Multiple Outlet Options â Includes 2Ă GFCI 120V/20A...
- Built for Appliances, Pumps & Jobsite Tools â Designed for refrigerators...
The Genkins GKJ11000ED is the most affordable option, but you’re trading power and runtime for that lower price. It only puts out 8,000 rated watts on gas and runs for just 6 hours â half the endurance of the Pulsar. I do like the automatic idle control and the 459cc engine, but with only 20 reviews and a 1-year warranty, it’s a riskier buy. This is for someone on a tight budget who only needs occasional power.
â Pros
- Automatic idle control saves fuel
- 459cc engine is slightly larger displacement than the others
- Electric start with recoil backup
â Cons
- Only 6 hours of runtime â worst in this group
- 8,000 rated watts is 1,500 less than the Pulsar and Westinghouse
- Only 20 customer reviews and a 1-year warranty
Which One Should You Buy?
I’ve spent a lot of time with these specs, and the honest truth is that the “best” generator depends entirely on whether you need max runtime, a long warranty, or the lowest price. Let me break it down for your specific situation.
Pulsar G12KBN Heavy Duty Portable Dual Fuel Generator is right for you if…
- You need the longest runtime for whole-home backup â the 8-gallon tank gives you a full 12 hours at half load.
- You want the highest rated watts on gas at 9,500W to run heavy appliances like a well pump and central AC.
- You need a 50A RV outlet built right in for camping or mobile living.
Westinghouse 12500 Peak Watt Dual Fuel Home Backup Portable Generator is right for you if…
- You want peace of mind with a 3-year warranty â that’s triple what the other two offer.
- You love the convenience of a remote start key fob to fire it up from inside your house.
- Safety is a priority and you want the built-in CO sensor and automatic low oil shutdown.
Genkins 11000 Watt Dual Fuel Portable Generator is right for you if…
- Your budget is tight and you need a dual fuel generator for occasional emergency use.
- You want automatic idle control to save fuel when you’re not running heavy loads.
- You only need 8,000 rated watts for basic appliances like a fridge, lights, and a few power tools.
â Who Should Skip All of These?
If you need clean power for sensitive electronics like laptops, TVs, or medical devices, you’ll want an inverter generator instead â these open-frame units can have dirty power that harms delicate gear. Also, if you only need to power a small RV or a few lights, a 3,000W to 5,000W inverter generator will be lighter, quieter, and easier on your wallet.
For the most common buyer who needs reliable whole-home backup power with the best runtime, I’d grab the Pulsar G12KBN without hesitation â its 9,500 rated watts and 12-hour runtime on an 8-gallon tank are unbeatable in this group.
Frequently Asked Questions
Which generator has the highest running watts â Pulsar, Westinghouse, or Genkins?
The Pulsar G12KBN and Westinghouse 12500W are tied for the highest running watts on gasoline at 9,500 rated watts each. The Genkins 11000W falls behind with only 8,000 rated watts on gas. If you need to power a well pump, central AC, or big appliances, I’d stick with the Pulsar or Westinghouse â the Genkins just doesn’t have enough continuous power for heavy loads.
Is the Westinghouse 12500W worth the extra money over the Pulsar G12KBN?
The Westinghouse costs more, but you get a 3-year warranty compared to the Pulsar’s 1-year, plus a remote start key fob and a CO sensor. The trade-off is that the Pulsar has a bigger 8-gallon fuel tank giving you the same 12-hour runtime, while the Westinghouse has a 6.6-gallon tank. If long-term warranty coverage matters most, the Westinghouse is worth it â if runtime and power are your priority, the Pulsar is the better value.
Which generator runs the longest on a single tank of gas?
The Pulsar G12KBN wins this category easily with its 8-gallon tank delivering up to 12 hours of runtime at half load. The Westinghouse also runs for 12 hours but uses a smaller 6.6-gallon tank, so it’s less efficient. The Genkins is the worst here â it only runs for 6 hours on its 6.6-gallon tank, which is half the endurance of the other two. If you don’t want to refuel constantly, go with the Pulsar.
Which generator is the quietest?
I can’t give you exact decibel numbers because none of these product pages list sound levels, which is frustrating. What I can tell you is that all three are open-frame generators, so none of them will be whisper-quiet like an inverter model. If noise is your main concern, you’ll want to look at a closed-frame inverter generator instead of any of these heavy-duty units.
Can I use these generators to power my whole house with a transfer switch?
Yes, all three generators are transfer switch ready. The Pulsar has a 120/240V 30A twist-lock outlet and a 50A outlet, the Westinghouse has a 120/240V 14-50R 50A outlet, and the Genkins has a L14-30R 120/240V 30A outlet. I’d recommend the Pulsar or Westinghouse for whole-home backup since they have higher rated watts â the Genkins at 8,000 rated watts may struggle with larger homes.
Which generator is best for an RV?
The Pulsar G12KBN is my pick for RV use because it has a dedicated 120/240V 50A outlet that’s RV ready, plus the longest runtime so you don’t have to refuel overnight. The Westinghouse also has a 50A RV-ready outlet, but its smaller tank means more trips to the gas station. The Genkins only has a 30A outlet, so it won’t power a 50A RV setup â it’s better for smaller campers.
My Final Verdict
The Pulsar G12KBN is my clear overall winner. It delivers the highest 9,500 rated watts on gas, a massive 8-gallon tank for 12 hours of runtime, and a 50A RV outlet â all at a price that beats the Westinghouse. The Westinghouse is the runner-up for buyers who value a 3-year warranty and remote start over a bigger fuel tank. The Genkins falls short with only 8,000 rated watts and a measly 6-hour runtime.
If you’re still on the fence, ask yourself this: do you want to refuel every 6 hours or every 12 hours? That 8-gallon tank on the Pulsar is the difference between sleeping through the night and waking up to refill. For most heavy duty home backup needs, the Pulsar is the obvious choice.
Winner: Pulsar G12KBN Heavy Duty Dual Fuel Generator
- 12, 000 peak watts/ 9, 500 Rated watts (gasoline) & 10, 800 peak watts...
- Dual fuel capability allows you to choose between gasoline & LPG fuel...
- The 457cc, single cylinder, 4-stroke, air cooled, OHV engine with electric...
This is the generator I’d buy for my own home. With 9,500 rated watts, 12 hours of runtime from an 8-gallon tank, and 7 outlets including a 50A RV plug, it’s the best all-around heavy duty dual fuel generator for the money.
Runner-Up: Westinghouse 12500 Peak Watt Dual Fuel Generator
- 9500 Running Watts and 12500 Peak Watts (Gasoline); 8500 Running Watts...
- Features Two GFCI 120V 5â20R 20A Standard Household Receptacle, One...
- Powered by a Heavy Duty 457cc Westinghouse 4-Stroke OHV Engine Featuring a...
Choose this if you want the best warranty in the group at 3 years, plus a remote start key fob and CO sensor. It matches the Pulsar’s 9,500 rated watts but has a smaller 6.6-gallon tank.
Best Budget: Genkins 11000 Watt Dual Fuel Generator
- 8,000W Gas / 7,200W LPG Dual Fuel Backup Power â Choose gasoline for...
- 120/240V Ready with Multiple Outlet Options â Includes 2Ă GFCI 120V/20A...
- Built for Appliances, Pumps & Jobsite Tools â Designed for refrigerators...
Only buy this if you’re on a strict budget and only need occasional power for basic appliances. Its 8,000 rated watts and 6-hour runtime are significantly less than the competition.
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