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PowerhorseModel s12500t

Powerhorse 9,500W Gas Generator Review

The Powerhorse s12500t is a versatile 12,500-watt tri-fuel portable generator equipped with electric start and CO shutdown features, suitable for various power needs.

At a Glance

  • Running Watts
    9500W
  • Starting Watts
    12500W
  • Fuel Type
    Gasoline
  • Runtime (50%)
    9h
  • Noise Level
    97 dB
  • Weight
    235 lbs

Where to buy

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    Is this the right generator for you?

    Here's the quick tradeoff view — what this model does well, and where it may not fit.

    Pros

    • Tri-fuel capability: operates on gasoline, propane, or natural gas.
    • Electric start with remote key start for convenience.
    • Equipped with CO detection and indicator light for safety.
    • Automatic voltage regulator with voltmeter ensures consistent power output.
    • Control panel displays run time, voltage, and frequency.
    • Wheel kit with flat-free tires and folding handles for portability.

    Cons

    • Heavy weight at 235 lbs
    • Noise level of 97 dB
    Best use cases
    Home backup

    Summary

    The Powerhorse S12500T generator is a robust and reliable power solution designed for both home and outdoor use. With a starting wattage of 12,500 watts and a running wattage of 9,500 watts, this generator is capable of handling a variety of appliances and tools, making it an excellent choice for emergency backup power, camping, and construction sites. Its gasoline fuel type ensures that users can easily refuel and maintain the generator, while the multiple starting mechanisms provide convenience and flexibility in operation.

    This generator is particularly suited for users who require substantial power for multiple devices simultaneously. Whether you are looking to power your refrigerator during a blackout, run tools on a job site, or provide energy for a recreational vehicle, the S12500T is equipped to meet these demands. Despite its higher noise level of 97 dB, the generator’s performance capabilities make it a strong contender in its category.

    Power & Runtime

    The Powerhorse S12500T operates on gasoline, a common and readily available fuel type that provides convenience for users. With a starting wattage of 12,500 watts, this generator can handle demanding appliances, while its running wattage of 9,500 watts allows for sustained power for multiple devices. The generator is equipped with a 6.6-gallon fuel tank, which supports extended use. At a half-load, users can expect a runtime of approximately 9 hours, making it suitable for longer power outages or extended outdoor activities.

    Noise levels are a consideration for any generator, and the S12500T operates at a noise level of 97 dB. While this may be on the higher end compared to quieter inverter generators, the power output justifies the noise for many users who prioritize wattage over sound. The generator features multiple starting mechanisms, including recoil, electric, and remote start options, providing flexibility in how users choose to operate the unit.

    When calculating runtime, it is important to consider the load being drawn from the generator. For instance, if running at 50% load, users can expect around 9 hours of operation from the full tank. This runtime makes the S12500T particularly useful for events or situations where consistent power is required over several hours.

    Outlets

    The Powerhorse S12500T generator is designed with a variety of outlets to accommodate different power needs, although specific outlet types and quantities are not detailed in the provided data. It is important to note that this generator is not RV-ready, which may limit its use for those looking to power recreational vehicles directly. Additionally, it lacks transfer switch capability, meaning users will need to explore alternative methods for safely connecting this generator to their home electrical systems.

    While the absence of detailed outlet specifications may raise concerns for some users, the generator's overall power output compensates for this by allowing for the connection of multiple devices through adapters or power strips. This flexibility can be particularly beneficial in emergency situations or when powering tools at a job site.

    Portability

    Weighing in at 235 pounds, the Powerhorse S12500T is a substantial generator that may require assistance for transport. Its dimensions of 29.3 x 26.7 x 26.4 inches suggest a compact design relative to its power output, but the weight does impact its portability. The frame design is sturdy, ensuring that the generator remains stable during operation, which is crucial for maintaining performance.

    To enhance mobility, the generator is equipped with wheels and handles, making it easier to maneuver across various terrains. While it may not be as portable as lighter models, the inclusion of wheels allows users to transport it to different locations with relative ease, especially for outdoor events or job sites where power is needed.

    Features

    The control panel of the Powerhorse S12500T is designed for user convenience, although specific details about the layout and functionalities are not provided. Users can expect essential controls for starting the generator and monitoring power output. Displays typically include indicators for fuel level, power output, and operational status, which are crucial for effective management of the generator during use.

    Safety features are an important aspect of any generator, and while specific safety mechanisms are not detailed, it is common for units of this caliber to include overload protection and low oil shutdown to prevent damage during operation. These features help ensure not only the longevity of the generator but also the safety of the users.

    Included accessories may vary, but typically, generators in this class come with basic tools for maintenance and operation. Users should check the package details to confirm the inclusion of necessary accessories, which can enhance the overall experience and functionality of the generator.

    Recommended Audiences

    • Homeowners needing reliable backup power during outages
    • Campers requiring a powerful generator for cooking and lighting
    • Construction professionals needing portable power for tools
    • Event organizers looking for temporary power solutions
    • Tailgaters wanting to power appliances and entertainment systems
    • Outdoor enthusiasts who need electricity for recreational activities
    • Users seeking a robust generator for emergency preparedness
    • Individuals looking for a multi-functional power source for various devices
    Updated: Jan 30, 2026

    Score Breakdown

    4.1
    / 10
    Rank #108 of 125 in Conventional (5,000-10,000W)
    Value (25%)
    Quality (25%)
    Practical (18%)
    Features (12%)
    Features (2.3 pts)
    • Tri-Fuel+1.3
    • Remote Start+0.4
    • Electric Start+0.6
    Percentile Rankings (within peer group)
    • Watts/$
    • Surge/$
    • Runtime/$
    • Warranty
    • THD (lower=better)
    • Build Quality
    • Noise (lower=better)
    • Portability
    • Outlet Variety
    • Feature Points

    What this generator can power

    At a Glance

    • Continuous:9,500W(recommended usable: 7,600W)
    • Surge:12,500W
    • Output:120/240V
    • Inverter:No

    Big-item compatibility

    Refrigerator
    Yes
    Sump Pump (1/3 HP)
    Yes
    Well Pump (1 HP, 240V)
    Yes
    Furnace Blower
    Yes
    Central AC (3 Ton, 240V)
    Yes
    Window AC (10,000 BTU)
    Yes
    Electric Water Heater (240V)
    Yes
    Electric Range/Oven (240V)
    Yes
    Air Compressor (1 HP)
    Yes

    Example setups

    Essentials

    • Lights + Wi-Fi + Charging
    • Refrigerator
    • Furnace Blower
    • Sump Pump (1/3 HP)

    Est. running: 1,800W

    Peak surge (single motor): 2,000W

    Avoid starting multiple motor loads at the same time.

    Essentials + Comfort

    • Lights + Wi-Fi + Charging
    • Refrigerator
    • TV + Entertainment System
    • Microwave
    • Window AC (10,000 BTU)
    • Space Heater
    • Furnace Blower

    Est. running: 5,000W

    Peak surge (single motor): 2,000W

    Avoid starting multiple motor loads at the same time.

    Whole-Home (Limited)

    • Lights + Wi-Fi + Charging
    • Refrigerator
    • Furnace Blower
    • Sump Pump (1/3 HP)
    • Well Pump (1 HP, 240V)
    • Central AC (3 Ton, 240V)

    Est. running: 7,300W

    Peak surge (single motor): 8,000W

    Avoid starting multiple motor loads at the same time.

    These are estimates using typical wattage assumptions. Real appliances vary. Startup surges can be 2–6× the running wattage for motor-driven loads. 240V loads require a 120/240V generator and proper connection. Use a transfer switch or interlock kit; never backfeed a panel.

    Powerhorse
    ReliabilityCAverage

    About Powerhorse

    Powerhorse is known for its reliable and affordable portable generators that cater primarily to homeowners and small businesses.

    Founded1981
    HQBurnsville, Minnesota, USA
    Website (opens in a new tab)
    Support1-800-221-0516
    Support / Manuals (opens in a new tab)
    View all Powerhorse generators

    Warranty

    Coverage: 2 years

    Power by fuel

    FuelRunningStartingRuntime @50%Runtime @25%
    Gasoline9500W12500W9h
    Natural Gas7125W9375W
    Propane8550W9375W

    Full Specifications

    Power

    Running Watts9,500 watts
    Starting Watts12,500 watts
    Starting Watts (Gasoline)12,500 W
    Starting Watts (Propane)9,375 W
    Starting Watts (Natural Gas)9,375 W
    Running Watts (Gasoline)9,500 W
    Running Watts (Propane)8,550 W
    Running Watts (Natural Gas)7,125 W

    Engine

    Engine457 cc OHV 4-stroke
    Engine TypeOHV 4-stroke
    Engine Displacement457 cc
    Spark ArrestorYes
    Emissions ComplianceEPA, ANSI/PGMA G300-2023

    Electrical

    Voltage (AC)120/240
    Voltage (DC)5
    AC Frequency60 hz
    GFCI OutletsYes
    NeutralYes
    USB Outlets2x 5V USB port (USB-A)
    DC Outlets2x 5V USB port (USB-A)
    AC Outlets2x Duplex 120V 20A (5-20R) GFCI; 1x 120/240V 30A (L14-30R); 1x 120/240V 50A (14-50R)
    Total Harmonic Distortion (THD)<23% %

    Dimensions

    Dimensions29.3 x 26.7 x 26.4 inches
    Weight235 lbs

    Other

    Automatic Low Oil ShutdownYes
    Emissions ComplianceEPA, ANSI/PGMA G300-2023
    Automatic Voltage RegulationYes
    Automatic Voltage RegulatorYes
    Carbon Monoxide SensorYes
    Covered OutletsYes
    Electric StartYes
    Fuel Connection Componentsnatural gas hose with NPT adapter, propane hose
    Fuel GaugeYes
    Fuel Tank Capacity6.6 gallons
    Included AccessoriesFunnel, tool kit, key fob, natural gas hose with NPT adapter, propane hose, and wheel kit
    IndicatorsYes
    InverterNo
    Mobility ComponentsYes
    Noise Level97 dBA
    Parallel CapableNo
    Part Number6,075,695
    Recoil StartYes
    Remote StartYes
    RV ReadyNo
    Starter TypeRecoil, Electric, Remote
    Starting ComponentsRecoil, Electric, Remote
    Starting SystemRecoil, Electric, Remote
    UPC840,321,764,034
    Warranty2 years
    WheelsYes

    Core

    Fuel TypeGasoline

    Runtime

    Runtime @ 50%9 hours
    Runtime @ 50% Load (Gasoline)9 hours

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