DuroMax

DuroMax XP28000iH 28,000 Watt Dual Fuel Portable Inverter Generator with CO Alert

Regular price $8,589.00 USD

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DuroMax XP28000iH 28,000 Watt Dual Fuel Portable Inverter Generator with CO Alert
$8,589.00 USD
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DuroMax XP28000iH 28,000 Watt Dual Fuel Portable Inverter Generator with CO Alert


Description

The DuroMax XP28000iH is a massive 28,000-watt dual fuel inverter generator engineered to deliver whole-home backup power with the quiet, clean output of true sine wave technology. Running on either gasoline or propane, this generator gives homeowners and facilities managers the fuel flexibility they need during emergencies, extended outages, or off-grid situations. With dual 50-amp outlets, 2-wire auto-start capability, and a 999cc 4-stroke OHV engine, it is purpose-built for seamless integration with transfer switches, interlock kits, and solar battery systems like the Tesla Powerwall.

Unlike conventional open-frame generators, the XP28000iH operates at variable speeds through demand-based idle control, keeping noise levels down to 70 dB at 25% load while maximizing fuel efficiency. Total harmonic distortion under 3% means your sensitive electronics - laptops, medical equipment, smart home devices - are fully protected. Whether you are powering a large home, a remote worksite, or an RV park, this generator is built to handle it all.


Key Features

  • 28,000 Peak Watts / 22,000 Running Watts (Gas): Enough power to run your entire home including air conditioning, refrigerators, lights, and more simultaneously.
  • Dual Fuel Technology (Gasoline & Propane): Switch between gasoline and propane on the fly for maximum fuel flexibility during any situation.
  • True Sine Wave Inverter Output (<3% THD): Produces clean, stable power safe for laptops, phones, medical devices, and other sensitive electronics.
  • CO Alert Sensor Shutdown: Built-in carbon monoxide sensor automatically shuts the generator down before dangerous CO levels accumulate - a critical safety feature.
  • Dual 50-Amp Outlets (NEMA 14-50R): Two 50-amp outlets for easy connection to interlock kits or transfer switches for whole-home backup power.
  • 2-Wire Auto-Start: Connects directly to your solar inverter's dry contacts to automatically start and stop the generator based on battery charge needs.
  • DC Output for 48V/52V Battery Banks: Charge Tesla Powerwalls and similar 48-56V solar battery systems directly from the generator's DC output.
  • Demand-Based Variable Speed Idle: Engine speed adjusts automatically to match the load, reducing noise, fuel consumption, and wear.
  • 999cc 4-Stroke OHV Engine with Cast Iron Sleeve: Heavy-duty engine with 100% copper windings and pressure/splash oil cooling for long-term reliability.
  • Push-Button & Remote Start: Electric push-button and remote start included - no pull cord required.
  • AGM Battery Technology: Longer battery lifespan and enhanced cold-weather starting performance compared to standard lead-acid batteries.
  • 5-Year Warranty with Nationwide Service: Backed by a 5-year parts and technical service warranty and supported by USA-based teams and service centers nationwide.

Shipping

Ships free! This generator ships via freight with liftgate and curbside delivery to the 48 contiguous U.S. states (excludes Alaska and Hawaii). Please email us at service@omahasportsandgames.com for a delivery ETA or to confirm shipping details.


What's Included

  • XP28000iH Generator
  • Propane Hose and Regulator
  • Oil Funnel
  • Spark Plug Wrench
  • Remote Control
  • Battery Tender
  • DC Cables
  • Tool Set
  • Owner's Manual

Why You'll Love It

The DuroMax XP28000iH is trusted by homeowners, facilities managers, and emergency preparedness professionals who refuse to be left without power when it matters most. Its inverter technology and variable-speed engine deliver the kind of quiet, clean output you would expect from a standby unit - in a portable package that can also serve the jobsite or RV. The cast iron cylinder sleeve, 100% copper windings, and AGM battery technology are engineered for years of dependable use, not just one or two storm seasons. DuroMax's USA-based support team and nationwide service center network mean you are never on your own if questions or issues arise. With dual fuel capability, automatic solar integration, and whole-home transfer switch compatibility, this generator is one of the most capable and versatile portable power solutions on the market.


Product Specifications

View Product Specs
Peak Wattage (Gas) 28,000 W
Running Wattage (Gas) 22,000 W
Running Amperage at 120V (Gas) 183.3 Amps
Running Amperage at 240V (Gas) 91.66 Amps
Runtime at 25% Load (Gas) 16 hrs
Runtime at 50% Load (Gas) 9 hrs
Peak Wattage (Propane) 25,000 W
Running Wattage (Propane) 20,000 W
Running Amperage at 120V (Propane) 166.67 Amps
Running Amperage at 240V (Propane) 83.3 Amps
Runtime at 25% Load - 40/60/100 lb Tank (Propane) 12 / 18 / 30 hrs
Runtime at 50% Load - 40/60/100 lb Tank (Propane) 6.67 / 10 / 16.66 hrs
Engine Manufacturer DuroMax Power Equipment
Engine Type 4-Stroke OHV
Engine Displacement 999 cc
Bore 90 mm
Stroke 78.5 mm
Engine Cooling Forced Air
Engine Speed Variable Speed (Demand Based)
Starting Type Electric Push Button + Remote
Recoil Start No
Fuel Delivery System Carburetor
Gasoline Tank Capacity 12.7 US gal.
Suggested Propane Tank Size 100 lbs. minimum
Oil Capacity 84.5 fl. oz. (2.5 L)
Recommended Oil 10W-30 (Blended, Conventional, or Synthetic)
Oil Cooling Pressure and Splash
Automatic Low Oil Shutdown Yes
Cast Iron Sleeve Yes
Bearing Type 6003 Sliding Bearing
CO Sensor Shutdown Yes
AC Rated Voltage 120/240V
AC Rated Frequency 60 Hz
Total Harmonic Distortion (THD) <3%
AC Phase Single
Winding Material 100% Copper
Neutral System Bonded
Noise Level 70 dB @ 25% load
Outlets 4x NEMA 5-20R (120V 20A GFCI), 1x NEMA L14-30R, 2x NEMA 14-50R (50A)
GFCI Outlets Yes
Digital Volt Meter Yes
Hour Meter Yes
Battery Tender Yes (included)
EPA Certified Yes
CARB Certified No
50 State Compliant No
Dimensions 39.25"L x 31"W x 34.5"H
Weight 466 lbs
Warranty 5 Years (Parts and Technical Service)
Assembly Required Minimal - add oil, connect propane hose if using propane
Shipping Method Freight - liftgate and curbside delivery included

Manuals & Guides

FAQ

Can the XP28000iH power my entire house?

The XP28000iH provides 28,000 peak watts and 22,000 running watts on gasoline - enough to power most homes including central air conditioning, refrigerators, lights, and more. For whole-home backup, you should assess your total power needs and have a licensed master electrician install a transfer switch or interlock kit to safely connect the generator to your home panel.

Is this generator safe for sensitive electronics like laptops and smart home devices?

Yes. As an inverter generator, the XP28000iH produces clean sine wave power with a total harmonic distortion (THD) of less than 3%. This makes it safe to power laptops, televisions, smart home devices, medical equipment, and other electronics that require stable, clean power.

What is the difference in performance between gasoline and propane?

On gasoline, the generator produces 28,000 peak watts and 22,000 running watts. On propane, output is slightly lower at 25,000 peak and 20,000 running watts - which is typical for dual fuel generators. Propane can offer longer runtime with a large enough tank (up to 30 hours at 25% load on a 100 lb tank) and is easier to store long-term, making it popular for emergency preparedness setups.

How does the 2-wire auto-start feature work?

The 2-wire start feature connects to your solar inverter's dry contact terminals. When your solar battery bank drops below a set threshold, the inverter sends a signal through those dry contacts that automatically starts the XP28000iH to recharge the batteries. When charging is complete, it shuts the generator back off - all without any manual intervention.

How loud is the XP28000iH during operation?

The XP28000iH operates at approximately 70 dB at 25% load. Thanks to its demand-based variable speed engine, noise levels are lower at lighter loads. This is significantly quieter than traditional open-frame generators of comparable wattage, making it much more suitable for residential neighborhoods.

Does this generator require professional installation?

The generator itself requires minimal setup - add oil, optionally connect a propane hose, and it is ready to run. However, for whole-home backup via a transfer switch or interlock kit, a licensed master electrician must perform the electrical connection to your home panel. DuroMax also has an authorized installer network to assist.

What areas does free shipping cover, and how is it delivered?

Free shipping applies to the 48 contiguous U.S. states (Alaska and Hawaii are excluded). Because this generator weighs 466 lbs, it ships via freight carrier with free liftgate service and curbside delivery included. The liftgate lowers the generator from the truck to the ground at your curb - you will need to arrange to move it to its final location.


Product specifications table
Specification name Specification Value
Color pattern Black
Power source Gasoline, Propane

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