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Smart Generators The Motorhead® – 12000/20000 Watt Dual Fuel Portable Generator With Honda Engine SG11004

SKU SG11004
Save 11% Save 11%
Original price $6,299.00
Original price $6,299.00 - Original price $6,299.00
Original price $6,299.00
Current price $5,588.88
$5,588.88 - $5,588.88
Current price $5,588.88

This is our flagship generator and the largest Dual Fuel generator we carry with a Honda engine. The Motorhead® Dual Fuel generator is the perfect generator for either Commercial or Residential use. It has a premium quality frame with 4 beefy never flat wheels for easy mobility. On the job site this unit can power all of your power tools without skipping a beat. It is also a great choice for a homeowner looking to power up a central air conditioner up to 5 tons, sum pump, well pump, heat, microwave, lights, entertainment center, computers, refrigerators, etc.


  • The Motorhead® – SG11004
  • Built with a Honda GX630 OHV Dual Fuel Engine
  • Designed to operate on both propane (LPG) and natural gas
  • 19.2 HP (LPG), 17 HP (Natural Gas)
  • Natural Gas requirement: 200,000 BTU per hour, 9″ W.C. of pressure
  • Propane (LPG) requirement: 200,000 BTU per hour, 11″ W.C. of pressure
  • Hydraulic/magnetic circuit breakers, GFCI & Twist-Lock Outlets
  • Premium Mecc Alte Alternator with 100% copper windings, Made in Italy
  • The AVR (Automatic Voltage Regulator) system provided by Mecc Alte produces precise voltage (less than 4% THD) necessary to power your sensitive electronics like computers


  • Electric Start
  • Low oil shutoff protection
  • Compatible with 50 amp manual transfer switch
  • Battery and commercial 4 wheeled mobility kit included
  • Digital display gives immediate accurate reading of Voltage, Hz, Hour meter and timer.
  • Run time on LPG (Propane) up to 10 hrs at 50-percent load per 40 pound fuel tank


  • Eliminates bad gasoline issues and lets you skip fuel-system winterization
  • Honda® 3-year commercial warranty
  • Smart Generators 3 year limited warranty


Additional Information

Weight 500 lbs
Dimensions 31.5 × 24 × 37.5 in
Product Weight

380 lbs




Honda GX630 OHV Dual Fuel Engine

Starting System



(2) 5-20R 120V 20A DUPLEX GFCI; (1) L14-30R 120V/240V 30A TWISTLOCK; (1) 14-50R 120V/240V 50A

Running Watts (LPG)


Starting Watts (LPG)


Running Watts (Natural Gas)


Starting Watts (Natural Gas)


Noise Level (dBA)



Helpful Links

How Do I Choose The Correct Size Generator For My House?

What Size Natural Gas Meter Do I Need To Fuel My Generator?

How To Choose The Correct Size Generator To Power Your Central Air Condtioner



Thank you for shopping at Smart Generators. Every one of our generators is assembled and tested by our highly trained technicians to insure the highest quality.


Once your generator is packaged and ready for shipment, you will receive an email notification including your tracking number. When the generator arrives at the destination terminal you will we contacted by the carrier to schedule a delivery appointment. A signature is required upon delivery. You must be available to inspect the generator and sign for the package. If you are not present for your delivery appointment additional charges will be incurred.


Your satisfactions with your purchase and experience is of the utmost importance. Please don’t hesitate to contact with questions or concerns and we will work to find a solution to the situation.

Due to the high cost of freight, returns and exchanges are not always possible. Please make sure to read product descriptions, dimensions and shipping policies carefully before completing your purchase.


Each generator is shipped in a heavy duty box strapped to a pallet during transit. Please check the integrity of the contents of the box before signing to receive the generator. We recommend refusing the generator if it has been obviously damaged or tampered with. Once you have signed for and accepted the package, all responsibility is removed from the carrier. If you suspect damage, PLEASE inspect your generator before signing any paperwork.

Smart Generators is not responsible for lost or damaged packages after they have been shipped.


If a package is returned because the buyer provided the wrong address or has not claimed a package after the delivery attempt, a refund will not be issued. The buyer must repay the shipping costs before the generator can be shipped again.


Your generator will generally ship within 2-5 business days of purchase. Check orders will be shipped once the deposit has been made and the check has cleared. If your generator is back ordered you will receive an email with an estimate of your wait time. You will receive a tracking number once your generator has shipped.


Thank you for shopping at Smart Generators. Every one of our generators is assembled and tested by our highly trained technicians to insure the highest quality.

Our return policy gives you 30 days from the shipping date to return any product, provided it’s new, unused and in the original packaging as received or defective. We highly recommend that the buyer thoroughly inspect the purchased product before using it and also ensure the user of the product is familiar with the correct application and proper care. If an item is opened and deemed to be defective within 30 days from the shipping date return the item to Smart Generators with the proper RMA number and Smart Generators will replace it with an identical item or a full store credit will be issued upon approval of the return. If a refund is requested a 15% restocking charge plus any shipping costs Smart Generators has incurred, will be assessed upon approval of the return. Return shipping is the responsibility of the buyer. We cannot accept returns for any reason after 30 days from the shipping date.

Smart Generators will only pay the return shipping costs if the return is a direct result of our error (you received an incorrect item) and re-ship the correct item at no charge.

All “Free Shipping Offers” will be charged a normal shipping charge before a refund is issued. If the return of a product or products causes the original order to fall below the free shipping threshold the remaining items and returned items will be billed for the normal shipping charges.

All shipping charges “ground or express” are non-refundable.

All manufacturers’ warranties will prevail.

Warranty shall not apply to: products which are used for a purpose other than which they were designed for or which have been altered in any way that would be detrimental to the performance or life of the product. Misapplication, misuse, negligence will revoke the warranty.

All returns are subject to our approval and must be accompanied by an RMA issued by a Smart Generators representative in order to be processed.

When we have received and processed your return, we will send you an email confirmation. Refunds take 5 to 7 business days to show a credit on your credit card. The credit will be for the amount of the merchandise ordered after any freight or restocking charges.

To Refund or Return Please Call 516-224-3363 to request a Return Authorization Number “RMA”

No returned merchandise will be accepted without a Return Material Authorization (RMA). Please call our toll free number and speak with a customer solutions representative to obtain a RMA # and shipping instructions.

Unopened Accessories
You may return any “unopened” accessories within 30 days of delivery for a full refund. Simply return the item to us, shipping using the most convenient shipping method available to you.

Opened Accessories & All Generators
“Opened” products and generators can be returned within 30 days of delivery*, but will be responsible for all freight costs both ways and a 10% restocking fee. Simply return the item to us using the most convenient shipping method available to you. Opened returns must be in salable condition with original materials and packaging.

* Engine powered equipment cannot be returned once it has been gassed or oiled due to federal shipping regulations.

Factory Direct Items 
These items are shipped to you directly from the manufacturer and may be returned with approval from the manufacturer. If approved, you may be responsible for round trip shipping costs, as some products include free shipping, yet the cost of shipping may be included in the retail price. You may also be responsible for a restocking fee of 10%.

Cancelled Orders
An order that has shipped cannot be cancelled. If you refuse an order, which has already been shipped, you will be responsible for both the outbound, return shipping costs, and a 10% restocking fee.

Built-to-Order Items
There are no returns allowed for products, which have been specially built for you and shipped by the manufacturer. These items are not routinely stocked at our warehouse and therefore cannot be returned.

Installed Items
Once an item has been installed it cannot be returned. Any damage due to improper installation is the responsibility of you or your installer. A warranty claim can be made, but it is up to the discretion of the manufacturer if they will cover any costs associated with an incorrect installation.

Damaged Products
You must take the time to inspect the goods before you sign the delivery receipt from the carrier. If you sign the delivery receipt without inspecting the shipment you will be responsible for filing a freight claim and arranging for a repair or return of the damaged goods. Concealed damage claims must be reported immediately.

Suspect Damage
On occasion, the outer carton may look damaged, but the product inside the box is perfectly fine. If you suspect concealed damage, notate “Possible Freight Damage” on the delivery receipt while the driver is present. This way, if you discover later that the product is damaged, the remedy of a freight claim is less of a hassle.

Obvious Damage
Do not sign for damaged products. If your product arrives damaged, please (a) REFUSE DELIVERY and (b) Call Us Immediately so we can process the appropriate claims and coordinate an exchange for you.

Defective Products 
We encourage you to test your product within 15 days of receipt so we can quickly remedy any mechanical problems. If you think your product is defective, don’t worry.

In most cases, it’s a simple issue that can be resolved over the phone. You are also welcome to contact the manufacturer’s customer service departments. They have expert technicians standing by to help solve your issue. Please have your model number and serial number available for fastest service.

Smart Generators was founded on the desire to provide a high quality, cost effective and reliable emergency power solution.

No more expensive yearly service contracts or maintenance!

About Us

Standby generators are designed to turn on periodically resulting in wear and tear, requiring periodical oil changes and maintenance even when you are not in a power outage. Our generators can be stored for many years in a dry location without weekly testing or yearly maintenance. This increases the usable lifespan of your generator.

Besides having the advantage of running on multiple fuels such as: Natural Gas, Propane (LPG), or Gasoline; our generators can be installed for half the cost of a typical standby installation, and without all the red tape and permits!

What differentiates Smart Generators with other less expensive brands? All our models are built with the most reliable parts on the market and are designed to produce clean electricity. How do we accomplish this? We use Honda engines because of their reliability and easy access to replacement parts. Mecc-Alte manufactures our alternators in Italy and our panels in the USA. These alternators are brushless and maintenance free with a 10,000 hour lifespan. The electricity our generators produce has less than 4% THD and is safe with sensitive electronics. This guarantees that your generator will run properly and produce safe electricity to power all your sensitive electronics. Our competition cannot make this promise. Some of our customers previously purchased cheap look-alikes and consequently damaged their costly appliances. As they say, “You get what you paid for,” and “Cry once.”