Generac 24kW Guardian

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Generac 24kW Guardian

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24kW
24 kW standby generator, top capacity in the air-cooled family for large homes and high electrical demand, delivering sustained whole-home backup with strong motor starting.

Rating and reviews

4.9/5

(50 New Reviews)

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5.0

Our Generac generator is what saved our belongings and is what ultimately saved us as a family. There was utter chaos and destruction outside, but my home was air conditioned and I had power.

Jennifer

Home User

5.0

We searched all over Indiana for the right company. Horizon was by far the most professional, and their installation was flawless. Our generator runs like a dream!”

Ethan & Laura

Home user

The Generation 8 – 24 kW model sits at the upper end of the air-cooled Guardian family, offering maximum standby capacity for very large homes and installations with high electrical demands.

Rated at 24,000 W on LP (21,000 W on NG), this unit supports multiple HVAC units, large electric heating loads, and numerous heavy appliances simultaneously when properly sized and installed.

Generac’s robust G-Force 1000 engine, coupled with True Power™ and advanced excitation design, provides powerful motor-starting capability and utility-grade waveforms with minimal harmonic distortion.
The 24 kW is UL/ETL listed and designed for demanding standby duty with a sound-attenuated enclosure, integrated muffler, and service-friendly access. Paired with a 200 A service-rated transfer switch and Smart Management Modules, this unit delivers full-service backup that many larger households require.
Horizon installs and commissions the 24 kW as a complete solution, permitting utility coordination, transfer switch integration, and final testing, and offers maintenance plans and extended warranty options to protect your investment for years to come.

24,000 W (LP) / 21,000 W (NG

peak standby power, ideal for very large homes.

Service-rated 200

A transfer switch compatibility and SMM support for multiple AC loads.

Durable enclosure & proven engine

design for continuous standby operation.

  • True Power™ Electrical Technology
  • Two-line multilingual digital LCD Evolution™ controller
  • 200 amp service rated transfer switch available
  • Electronic governor
  • Standard Wi-Fi connectivity
  • System status & maintenance interval LED indicators
  • Sound attenuated enclosure
  • Natural gas or LP gas operatio
  • 5 Year limited warranty
  • Listed and labeled for installation as close as 18 in (457 mm) to a structure.*

Who this unit is best for

Homeowners Choose Us

Medium to large single-family homes that want near whole-home backup

Homes with central HVAC systems that must stay on during outages.

Families who want automatic, hands-free protection (no portable generator setup).

Homeowners looking for a long-term, low-maintenance standby solution.

Generac 24kW Standby

Generator Specifications

Specification

24 kW

Rated standby power (LP / NG)

24,000 W / 21,000 W

Rated current @ 240 V (LP / NG)

100 A / 87.5 A

Main line circuit breaker

100 A

Phase

Single (1Ø)

Engine

Generac G-Force 1000 Series (2 cyl)

Displacement

999 cc

Unit weight

~455 lb (206 kg)

Dimensions (L×W×H)

~48 × 25 × 29 in

Noise (23 ft, normal load)

~67 dB(A)

Quiet-Test™ noise

~67 dB(A)

Controller

Evolution™ two-line LCD

Warranty

5-year limited (dealer registered)

Accessories

  • 200 A service-rated transfer switch and Smart Management Modules.
  • LP tank fuel level monitor, Mobile Link modules, maintenance kits, and cold-weather kits.

Installation & warranty notes

  • UL/ETL listed for residential standby use and certified for installation 18 in (457 mm) from the home per local codes. Horizon manages turnkey setup, including permitting, pad, fuel, and electrical connection. Includes Generac’s standard 5-year limited warranty, activated at commissioning.

Frequently Asked
Questions (FAQs)

Still have a Questions

If you more questions to know you can check more query related to Generac®

Is the 24 kW too large for a typical home?

The 24 kW is intended for large homes or high-demand properties. Horizon willperform a load analysis to confirm if this capacity is appropriate or if a 20/22 kW
model plus SMMs is better.

A 200A service-rated transfer switch is recommended for whole-house service; Smart Switch options allow load management without oversizing the generator.
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