10 Best Standby Generator of December 2025

List of Top Rated Standby Generator from thousands of customer reviews & feedback.

Updated On Dec 2025

2,505 Reviews Studied

By Customer Ratings

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Generac 70432 Home Standby Generator Guardian Series 22kW/19.5kW Air Cooled with Wi-Fi and Transfer Switch, Aluminum Read Review

  • 5-Year limited Warranty for automatic standby generators.
  • Up to whole house protection with the 200 Amp, NEMA 3R (aluminum outdoor enclosure) smart switch
  • Smart, User-friendly controls. Generac’s evolution controller features a multilingual LCD display that allows you to Monitor Battery status and track maintenance intervals to ensure your generator is always in top operating condition.

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Champion 3800-Watt Dual Fuel RV Ready Portable Generator with Electric Start Read Review

  • Dual Fuel: Operate your 3800-watt portable generator right out of the box on either gasoline or propane, plus the unit holds 0.6-quarts of oil (included) and has a low oil shut-off sensor
  • Electric Start: Power up the 224cc Champion engine with the handy toggle switch, battery included
  • Intelligauge: Keep track of voltage, hertz and run-time hours to easily monitor power output and track maintenance intervals
  • Outlets: One 120V 30A RV outlet (TT-30R), one 120V 30A locking outlet (L5-30R) and two 120V 20A household outlets (5-20R) - trust Volt Guard built-in surge protector to prevent overloads
  • Champion Support: Includes 3-year limited warranty with FREE lifetime technical support from dedicated experts

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Reliance Controls 31410CRK Pro/Tran 10-Circuit 30 Amp Generator Transfer Switch Kit,Gray Read Review

  • Convenient transfer switch kit, ideal for your circuitry and multi-wiring needs, is also made for reliably-fast installation in both residential and commercial applications
  • Designed specifically for generators up to 7,500 maximum running watts
  • 18-inch flexible conduit whip attaches easily to the load center
  • Maximum single-pole circuits: 10 / Maximum double-pole circuits: 5
  • Features a rugged, powder-coated steel cabinet. six combination knockouts and more

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Westinghouse WGen7500 Portable Generator with Remote Electric Start - 7500 Rated Watts & 9500 Peak Watts - Gas Powered -... Read Review

  • Features Two GFCI (Ground Fault Circuit Interrupter) 5-20R 120V Household Duplex Receptacle and One L14-30R 120/240V Twist-Lock Receptacle; All Outlets Have Rubber Covers for Added Safety
  • Plug-and-Play: Comes with a Remote Start Key Fob, 12V Battery Charger, Oil, an Oil Funnel, a Tool Kit, and a User's Manual to Get You Started Right Out of the Box (Minimal Assembly Required)
  • Powered by a 420cc Westinghouse 4-Stroke OHV Engine Featuring a Long-Lasting Cast Iron Sleeve with Automatic Low Oil Shutdown and Digital Hour Meter. Noise Level-72 dBA
  • All Westinghouse Portable Generators are Functionally Tested in the Factory and May Contain Minimum Residual Oil and/or Fuel Odor; EPA and CARB Compliant; Backed by 3-Year Limited Service, Labor, and Parts Coverage with Nationwide Customer Service Network
  • 7500 Running Watts and 9500 Peak Watts; Remote Start With Included Key Fob, Electric and Recoil Start; Up to 11 Hours of Run Time on a 6.6 Gallon Fuel Tank With Fuel Gauge

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Briggs & Stratton 040626 12kW w/ 200 Amp Symphony II Switch Standby Generator, Gray Read Review

  • Includes 200amp Whole House Automatic Transfer Switch
  • Less than 5% THD for sensitive electronics and the ability to start a 5-ton air conditioner
  • Symphony II Power Management manages the distribution of power to your selected appliances automatically. Load management ensures the generator won't overload and shutdown so your family can continue with its daily routine. Available with the 200amp Sympthony II Transfer Switch.
  • Commercial Vanguard Engine Our in house state of the art equipment to enhance part control which makes the Vanguard Engine one of the best in the industry. The premium Vanguard V-Twin vertical engine has been designed and engineered to deliver the most durable performance in the industry
  • 5 Year Limited Best in Class that covers parts, labor, and travel for the full-length of the . Unlike other standby generator manufacturers, our covers parts, labor AND travel for the full length of the with no hidden fees!
  • New Updated Control System with a low speed run to save fuel and reduce noise as well as a programmable exercise modes and cycle times for tighter control
  • material type: Metal
  • engine type: 4-Stroke

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Briggs & Stratton 040621 20kW w/ 200 Amp Symphony II Switch Standby Generator, Gray Read Review

  • New Updated Control System with a low speed run to save fuel and reduce noise as well as a programmable exercise modes and cycle times for tighter control
  • Smart automatic voltage regulator optimizes generator performance wither tighter voltage control giving you less than 5% THD for sensitive electronics and an increased motor starting capability
  • Symphony II Power Management manages the distribution of power to your selected appliances automatically. Load management ensures the generator won't overload and shutdown so your family can continue with its daily routine. Available with the 200amp Sympthony II Transfer Switch.
  • Commercial Vanguard Engine Our in house state of the art equipment to enhance part control which makes the Vanguard Engine one of the best in the industry. The premium Vanguard V-Twin horizontal engine has been designed and engineered to deliver the most durable performance in the industry
  • 5 Year Limited Best in Class Warranty that covers parts, labor, and travel for the full-length of the warranty. Unlike other standby generator manufacturers, our warranty covers parts, labor AND travel for the full length of the warranty with no hidden fees!
  • material type: Metal
  • engine type: 4-Stroke
  • power source type: Natural Gas

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Generac 5685 Air-Cooled Standby Generator Transport Cart Read Review

  • Compatible with all air-cooled models
  • Large wheels and a wide handle take the hassle out of transportation
  • Allows a single person to move the generator without additional people or tools
  • Is easy to use and lifts the generator through leverage
  • 2 year warranty

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Briggs & Stratton 40375 10kW Standby Generator, Gray Read Review

  • Dependable engine power from commercial grade Briggs & Stratton Vanguard engines
  • Thanks to Symphony II Power Management System, a smaller home generator system by Briggs & Stratton can meet all your needs and save you money in the process
  • This 10kW with Symphony II Power Management can manage a home,, up to 4,200 square feet with a 3 ton air conditioner saving you thousands less than a previously required 20kW
  • The transfer switch is rated for both indoor and outdoor use to save you money on installation
  • Comprehensive 5 year parts AND labor limited warranty

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DuroMax XP4400EH Dual Fuel Electric Start Portable Generator, Blue and Black Read Review

  • Your purchase includes One DuroMax XP4400EH 4400 watt Dual Fuel Hybrid generator with Electric Start, One oil funnel, One spark plug wrench, tools set, wheels and handle kit, DC charging cables and owner’s manual
  • Portable Generator dimensions: 24” L x 17" W x 17" H. Product weight: 127 lbs
  • Specifications: Noise level – 69 dB. Fuel tank capacity (GASOLINE) – 3.96 gallons. Suggested tank size (PROPANE) – 20 gallons
  • The ability to run on Propane or Gasoline allows the Freedom and Flexibility of Fuel Choice
  • With 4,400 starting watts and 3,500 running watts, this unit can handle heavy loads from lights and a refrigerator to a home air conditioner and high amperage power tools. Operate at both 120 V and 240 V simultaneously, or at 120 only with full power