Skip to content
Skip to main content
Home/Generator/Powerhorse s15000d
PowerhorseModel s15000d

Powerhorse 12,000W Dual-Fuel Generator Review

The Powerhorse s15000d is a dual-fuel portable generator delivering 15,000 surge watts and 12,000 rated watts, suitable for emergency home backup, EV charging, and demanding worksites.

At a Glance

  • Running Watts
    12000W
  • Starting Watts
    15000W
  • Fuel Type
    Dual-Fuel
  • Runtime (50%)
    10h
  • Noise Level
    97 dB
  • Weight
    348 lbs

Where to buy

Prices can change. We update these automatically.

    Disclosure: Some links may be affiliate links. Specs and comparisons are never hidden.

    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

    • 713cc engine ideal for emergency home backup, EV charging, portable/mobile businesses, RVs, remote worksites, outdoor events, and disaster recovery
    • Dual fuel technology provides the option of using gasoline or propane and allows switching between fuels without shutting down
    • Produces less than 5% total harmonic distortion for safely powering sensitive electronics
    • Electric start ensures quick, easy starting (12V, 18Ah battery included)
    • Carbon monoxide monitoring, automatic voltage regulation, and overload protection provide additional safety and peace of mind
    • Includes 100% copper-wound head, low oil shutdown, and covered outlets
    • Wheel kit with folding handles and flat-free tires for easy portability
    • Includes pressure-reducing regulator with 4.92ft. LP hose

    Cons

    • Heavy weight at 348 lbs
    • High noise level at 97 dB
    • Not RV ready
    Best use cases
    Home backup

    Summary

    The Powerhorse S15000D generator is a robust dual-fuel model designed to meet a variety of power needs, whether for home backup during outages, outdoor events, or job sites. With a starting wattage of 15,000 watts and running wattage of 12,000 watts, this generator is capable of powering multiple appliances simultaneously, making it an excellent choice for users who require reliable and substantial energy output. Its dual-fuel capability allows users to switch between gasoline and propane, providing flexibility and convenience depending on availability and preference.

    Designed with a focus on performance, the S15000D is equipped to handle demanding tasks while maintaining a manageable runtime. The generator’s specifications, including a fuel tank capacity of 10.6 gallons, ensure it can run for extended periods, especially at 50% load, where it can operate for up to 10 hours. The unit’s features cater to both novice and experienced users, making it suitable for a wide range of applications.

    Power & Runtime

    The Powerhorse S15000D operates on dual fuel, allowing users to choose between gasoline and propane. This flexibility is particularly advantageous in situations where one fuel type may be more accessible than the other. With a starting wattage of 15,000 watts and a running wattage of 12,000 watts, users can power a variety of appliances, from refrigerators to power tools, without compromising performance.

    In terms of noise level, the S15000D operates at 97 decibels. While this may be on the higher side compared to quieter inverter generators, it is typical for units of this power class. Users should consider this noise level when planning to use the generator in residential areas or during nighttime operations.

    The S15000D features an electric starting system, which simplifies the process of getting the generator up and running. For runtime calculations, the generator can run for up to 10 hours at 50% load on a full 10.6-gallon fuel tank, making it suitable for extended use during power outages or outdoor events. However, it is important to note that the runtime at 25% load is not specified.

    Outlets

    The Powerhorse S15000D does not come with a detailed list of outlets, but it is essential to consider the outlet configuration for effective power distribution. The generator is not RV-ready, which may limit its use for recreational vehicle applications. Additionally, it lacks transfer switch capability, meaning it is not designed for direct connection to home electrical systems without additional equipment.

    While the absence of specific outlet information may be a drawback for some users, the generator's high wattage output compensates by allowing for multiple devices to be powered simultaneously through standard outlets. Users will need to ensure they have the appropriate adapters or extension cords to accommodate their devices.

    Portability

    Weighing in at 348 pounds, the Powerhorse S15000D is a heavy-duty generator that prioritizes power over portability. Its dimensions of 34.3 inches in length, 23.2 inches in width, and 32.9 inches in height make it a substantial unit that may require assistance to move.

    The generator features a sturdy frame design that enhances durability, making it suitable for both stationary and mobile applications. While it is not specifically mentioned if the unit includes wheels or handles, users should anticipate that transportation may require a dolly or similar equipment due to its weight and size. This generator is likely best suited for users who plan to keep it in one location rather than frequently moving it.

    Features

    The control panel of the Powerhorse S15000D is designed for straightforward operation, featuring essential controls for starting the generator and monitoring its performance. Although specific display features are not detailed, users can expect basic indicators for fuel levels and operational status.

    Safety features are crucial in any generator, and while specific safety mechanisms are not enumerated, the electric start system typically includes safeguards to prevent accidental starts. Additionally, the generator operates with a total harmonic distortion (THD) of less than 5%, ensuring cleaner power delivery that is safer for sensitive electronics.

    Included accessories are not specified, so users may need to purchase additional items such as extension cords or maintenance kits separately. This consideration is important for those who want to maximize the generator's potential right out of the box.

    Recommended Audiences

    • Homeowners seeking reliable backup power during outages
    • Contractors needing a portable power source for job sites
    • Outdoor enthusiasts requiring power for events or camping (with additional setup)
    • Users looking for a dual-fuel generator for flexibility in fuel choice
    • Individuals who prioritize high wattage output for multiple appliances
    • Emergency preparedness planners wanting a robust generator
    • Users comfortable with handling larger, heavier equipment
    • Those who need a generator for temporary power solutions at outdoor activities
    Updated: Jan 30, 2026

    Score Breakdown

    4.1
    / 10
    Rank #38 of 44 in Conventional (10,000-20,000W)
    Value (25%)
    Quality (25%)
    Practical (18%)
    Features (12%)
    Features (1.6 pts)
    • Dual-Fuel+1
    • 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:12,000W(recommended usable: 9,600W)
    • Surge:15,000W
    • 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%
    Gasoline15000W
    Propane10800W13500W

    Full Specifications

    Power

    Running Watts12,000 watts
    Starting Watts15,000 watts
    Starting Watts (Gasoline)15,000 W
    Starting Watts (Propane)13,500 W
    Running Watts (Propane)10,800 W

    Engine

    Engine713 cc OHV V-Twin
    Engine TypeOHV V-Twin
    Engine Displacement713 cc
    Spark ArrestorYes
    Emissions ComplianceEPA, ANSI/PGMA G300-2023

    Electrical

    Voltage (AC)120/240V 60 Hz
    Voltage (DC)12
    Running Amps100 A
    Peak Amps125 A
    AC Frequency60 hz
    GFCI OutletsYes
    DC Outlets1x 12V 8A receptacle
    Total Harmonic Distortion (THD)<5% %

    Dimensions

    Dimensions34.3 x 23.2 x 32.9 inches
    Weight348 lbs

    Other

    Automatic Low Oil ShutdownYes
    Emissions ComplianceEPA, ANSI/PGMA G300-2023
    Automatic Voltage RegulationYes
    Automatic Voltage RegulatorYes
    Battery12V, 18Ah
    Carbon Monoxide SensorYes
    Covered OutletsYes
    Electric StartYes
    Fuel GaugeYes
    Fuel Tank Capacity10.6 gallons
    Included AccessoriesFunnel, tool kit, propane hose, battery charging cables, battery, and wheel kit
    IndicatorsYes
    InverterNo
    Mobility ComponentsYes
    Noise Level97 dBA
    Overload ProtectionLow oil and overload protection, CO monitoring
    Parallel CapableNo
    Part Number6,075,687
    RV ReadyNo
    Starter TypeElectric
    Starting Componentsbattery charging cables, battery
    Starting SystemElectric
    UPC840,321,764,027
    Warranty2 years
    WheelsYes

    Core

    Fuel TypeDual-Fuel

    Runtime

    Runtime @ 50%10 hours

    Questions & Answers

    0 questions
    Ask a question
    Loading questions…

    Ask a question

    Between 10 and 500 characters.0/500
    We'll only use this to notify you when it's answered.
    2-60 characters. This may be posted publicly with your question.

    Owner Reviews

    0 reviews
    Write a review
    Loading reviews...

    Write a review

    Describe your ownership experience. No links, prices, or retailer mentions.

    Checking sign-in...