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Propane / Heating Oil / HVAC Services

Service 800.645.4328

12 kW Fortress generator

Briggs and Stratton 12kw Generator

Back-up power for small to medium sized homes. This generator features a 10-year limited warranty including parts, labor and travel for all 10 years, this generator will be ready to run when it’s needed most.

Key features:

  • Durable Enclosure
  • Flexible Placement
  • Superior Customer Support
  • Financing Solutions
  • 10 year parts and labor


Model # 040579
Running Watts (NG)* 11,000
Engine Series Vanguardtm
Operation Fully Automatic
Running Amps (LP) 50
Alternator Type Computer Friendly
NG Fuel Consumption** 50% Load 116.9ft3/hr
Battery/Battery Charger Yes
Length (in) 28
Height (in) 37.2
Warranty (Product)*** 10 Year Parts, Labor & Travel Limited Warranty
Running Watts (LP)* 12,000
Engine Brand Briggs & Stratton
Engine Displacement (cc) 627
Voltage (V) 120/240V AC, Single Phase, 1.0 pf
Running Amps (NG) 45.8
LP Fuel Consumption** 50% Load = 1.7 gal/hr
Weekly Exerciser Yes
Diagnostic Alerts with Remote System Status Low Oil Shutdown, Engine Does Not Start, Low Frequency, Engine Overspeed, Low Voltage, Low Battery Voltage, Oil Temp High, Transfer Switch Fault
Width (in) 26
Weight (lbs) 318

*NG = Natural Gas; LP = Liquid Propane. **Fuel consumption rates are estimated based on normal operating conditions at 1/2 load. Generator operation may be greatly affected by elevation and the cycling operation of multiple electrical appliances - fuel flow rates may vary depending on these factors. ***See Operator's Manual or for complete warranty details.

Please call 1.888.735.5651 to speak with a qualified representative. 

Service is key to maintaining the longevity of your equipment. Please call 1.800.645.4328 to schedule a service call. With years of experience, our certified technicians are all licensed and bonded. Our local customer service teams and technicians have everything they need and are always available to help you, whenever you need them, 24/7, all year.