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Generac RG15089GNAC 150kW Standby Generator Liquid Cooled Dual Fuel Natural Gas Propane 120/208V 3 Phase New

GeneracModel RG15089GNAC

Generac RG15089GNAC 150kW Standby Generator Liquid Cooled Dual Fuel Natural Gas Propane 120/208V 3 Phase

  • Peak150 kW
  • Running120 kW
  • FuelNG / LP
  • StartAutomatic
Black Friday price
$30,089.00

Price from December 1: $34,609.00

Black Friday price ends in —

In stock Ships within 24 hours

Free delivery Wed, Nov 18 – Mon, Nov 23 if you order today, by Expedited LTL freight to your curb or driveway.

Other versions of this model

This one$30,089.00RG15090GNAC$30,089.00RG15090KNAC · 480V$30,089.00RG15089KNAC · 480V$30,089.00RG15089JNAC · 240V$30,089.00
  • Free shipping48 states + DC
  • 30-day returnsReturn shipping on us
  • Full warrantyBrand-new, from the maker
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Questions before you buy? Our small team in New York answers every message personally. Email support@acrepower.com

The Generac RG15089 150kW generator is a liquid-cooled standby power system built for business, retail, office, and agricultural applications.

Running watts
120,000 W
Starting watts
150,000 W
Fuel
Natural gas or propane
Start
Automatic
SKU: RG15089GNAC
Category: , , , ,

The Generac RG15089 150kW generator is a liquid-cooled standby power system built for business, retail, office, and agricultural applications. With controller-selected fuel type able to produce 150kW using natural gas or 120kW using propane, it delivers utility-grade power with less than 5% total harmonic distortion for sensitive electronics and demanding equipment. Powered by the Generac 8.9L 8-cylinder Turbocharged & Aftercooled engine with Electronic Fuel Ignition Control (EFIC) technology and catalyst. Includes WiFi connectivity for remote generator monitoring. Its aluminum enclosure and corrosion-resistant construction are designed for reliable long-term performance.

Full specifications

BrandGenerac
ModelRG15089GNAC
Running watts120,000 W
Starting watts150,000 W
FuelNatural gas or propane
StartAutomatic
How it shipsExpedited LTL freightTo your curb or driveway, free
Order today, deliveredWed, Nov 18 – Mon, Nov 23Leaves our warehouse within 24 hours

It travels on a pallet. The carrier calls ahead to book a delivery window; please have help on hand to move it.

  1. Answer the carrier’s call to book your delivery window.
  2. Keep a clear, level spot on your driveway or at the curb for unloading.
  3. Have help on hand. Freight drivers don’t carry items onto your property.
  4. Inspect before you sign and photograph any damage. Tell us within 48 hours.

We ship to the 48 contiguous states and Washington, DC. Shipping details · 30-day free returns

Brand-new, with the full manufacturer’s warranty. The terms are set by Generac and included in the box. If something goes wrong, contact us first: we confirm the next steps within 2 business days and help you file the claim.

Home standby checklist
  • Installation is not included. Use a licensed electrician and, for the gas line, a licensed gas contractor, with local permits.
  • Register the unit with the manufacturer after installation; some brands shorten the warranty if you don’t.
  • Keep the paperwork: order confirmation, installer’s invoice and permit sign-off.
  • Follow the maintenance schedule in the owner’s manual.

How warranty claims work

What it can run

120,000 W running, 150,000 W starting

Pick what you want to power at the same time.

Typical wattages - check the label on your own appliances. Where only one figure is published, running watts are estimated at 80% of the starting figure. Connect to house circuits only through a transfer switch or interlock fitted by a licensed electrician.

Compare similar generators

Same power class, side by side.

SpecificationGenerac RG15089GNAC 150kW Standby Generator Liquid Cooled Dual Fuel Natural Gas Propane 120/208V 3 PhaseThis generator$30,089.00Kohler 150ERESC-QS8 150KW 120/240V Single Phase Standby Generator Steel$33,759.00Cummins RS150 150kW Standby Generator Quiet Connect Dual Fuel Propane Natural Gas Liquid Cooled 1 Phase 120/240V$32,329.00
Running watts120,000 W120,000 W120,000 W
Starting watts150,000 W150,000 W150,000 W
FuelNatural gas or propaneNatural gas or propaneNatural gas or propane
StartAutomaticAutomaticAutomatic
LinkYou are hereView →View →

Questions and answers

Answered by our team in New York. Can’t find yours? Ask below.

Can I connect this generator to my house?
Only through a transfer switch or an interlock kit installed by a licensed electrician. Never plug a generator into a wall outlet: it can back-feed the utility line and endanger line workers. Connecting safely.
What can it run at the same time?
Use the What it can run planner above: tick your appliances and it checks both the running load and the start-up surge against this generator.
Does it ship with oil?
It depends on the manufacturer. If oil is included it is listed under What’s in the box; otherwise use the grade given in the owner’s manual before the first start.
Can I use it in the rain?
Not uncovered. Run it on a dry surface under an open, canopy-like cover, at least 20 feet from doors, windows and vents, and never in a garage.
Is installation included?
No. A home standby generator needs a licensed electrician, a licensed gas contractor for the fuel line and local permits. Delivery to your curb or driveway is free.
How will it be delivered?
Free, by Expedited LTL freight to your curb or driveway, usually within 2–5 business days after it ships. It travels on a pallet. The carrier calls ahead to book a delivery window; please have help on hand to move it.
What if it arrives damaged?
Photograph it and email us within 48 hours of delivery. We replace or refund damaged items at no cost to you.
Ask a questionWe reply personally by email.

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