Commercial Standby Generators

134 products

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  • Generac Protector 130KW Automatic Standby Liquid-Cooled Gaseous Engine Generator in Aluminum Enclosure - RG13090

    Generac Protector 130KW Automatic Standby Liquid-Cooled Gaseous Engine Generator in Aluminum Enclosure - RG13090

    SKU: PES-PS-GEN-0041
    MPN NO

    RG13090

    Cell / Type

    Generators

    Generac
    $40,467.58 USD
    $40,467.58 USD
    In stock
  • Kohler KG80R 80kW 3-Phase Steel Enclosure

    Kohler KG80R 80kW 3-Phase 120/240V Standby Generator – Steel Enclosure - KG80R-QS3

    SKU: PES-PS-GEN-0282
    MPN NO

    KG80R-QS3

    Cell / Type

    Generators

    Kohler
    $33,880.09 USD
    $33,880.09 USD
    In stock
  • Kohler KG80R 80kW 3-Phase 120/208V Standby Generator – Steel Enclosure - KG80R-QS2

    Kohler KG80R 80kW 3-Phase 120/208V Standby Generator – Steel Enclosure - KG80R-QS2

    SKU: PES-PS-GEN-0283
    MPN NO

    KG80R-QS2

    Cell / Type

    Generators

    Kohler
    $33,880.09 USD
    $33,880.09 USD
    In stock
  • Kohler KG80R 80kW 1-Phase 120/240V Standby Generator – Aluminum Enclosure, Catalyst, CA/MA Compliant - KG80R-QS7

    Kohler KG80R 80kW 1-Phase 120/240V Standby Generator – Aluminum Enclosure, Catalyst, CA/MA Compliant - KG80R-QS7

    SKU: PES-PS-GEN-0276
    MPN NO

    KG80R-QS7

    Cell / Type

    Generators

    Kohler
    $33,880.09 USD
    $33,880.09 USD
    In stock
  • Kohler KG80R 80kW 3-Phase 277/480V Standby Generator – Steel Enclosure - KG80R-QS4

    Kohler KG80R 80kW 3-Phase 277/480V Standby Generator – Steel Enclosure - KG80R-QS4

    SKU: PES-PS-GEN-0281
    MPN NO

    KG80R-QS4

    Cell / Type

    Generators

    Kohler
    $32,916.50 USD
    $32,916.50 USD
    In stock
  • Kohler KG80R 80kW 3-Phase 120/208V Standby Generator – Steel Enclosure, Catalyst, CA/MA Compliant - KG80R-QS8

    Kohler KG80R 80kW 3-Phase 120/208V Standby Generator – Steel Enclosure, Catalyst, CA/MA Compliant - KG80R-QS8

    SKU: PES-PS-GEN-0278
    MPN NO

    KG80R-QS8

    Cell / Type

    Generators

    Kohler
    $32,916.50 USD
    $32,916.50 USD
    In stock
  • Kohler KG80R 80kW 1-Phase 120/240V Standby Generator – Steel Enclosure, Catalyst, CA/MA Compliant - KG80R-QS6

    Kohler KG80R 80kW 1-Phase 120/240V Standby Generator – Steel Enclosure, Catalyst, CA/MA Compliant - KG80R-QS6

    SKU: PES-PS-GEN-0277
    MPN NO

    KG80R-QS6

    Cell / Type

    Generators

    Kohler
    $33,880.09 USD
    $33,880.09 USD
    In stock
  • Kohler KG125R 125kW 3-Phase 277/480V Standby Generator - KG125R-QS4

    Kohler KG125R 125kW 3-Phase 277/480V Standby Generator - KG125R-QS4

    SKU: PES-PS-GEN-0268
    MPN NO

    KG125R-QS4

    Cell / Type

    Generators

    Kohler
    $43,545.86 USD
    $43,545.86 USD
    In stock
  • Kohler KG80R 80kW 1-Phase 120/240V Standby Generator

    Kohler KG80R 80kW 1-Phase 120/240V Standby Generator – Steel Enclosure - KG80R-QS

    SKU: PES-PS-GEN-0284
    MPN NO

    KG80R-QS

    Cell / Type

    Generators

    Kohler
    $27,670.65 USD
    $27,670.65 USD
    In stock
  • Kohler KG100R 100kW 3-Phase 120/208V Standby Generator – Steel Enclosure, CA/MA Compliant - KG100R-QS2

    Kohler KG100R 100kW 3-Phase 120/208V Standby Generator – Steel Enclosure, CA/MA Compliant - KG100R-QS2

    SKU: PES-PS-GEN-0274
    MPN NO

    KG100R-QS2

    Cell / Type

    Generators

    Kohler
    $40,798.75 USD
    $40,798.75 USD
    In stock
  • Kohler KG125R-QS 125kW 120/240V 1-Phase Standby Generator

    Kohler KG125R 125kW 1-Phase 120/240V Standby Generator - KG125R-QS

    SKU: PES-PS-GEN-0254
    MPN NO

    KG125R-QS

    Cell / Type

    Generators

    Kohler
    $43,545.86 USD
    $43,545.86 USD
    In stock
  • Kohler KG80R 80kW 1-Phase 120/240V Standby Generator – Aluminum Enclosure - KG80R-QS1

    Kohler KG80R 80kW 1-Phase 120/240V Standby Generator – Aluminum Enclosure - KG80R-QS1

    SKU: PES-PS-GEN-0280
    MPN NO

    KG80R-QS1

    Cell / Type

    Generators

    Kohler
    $34,163.38 USD
    $34,089.00 USD $34,163.38 USD
    In stock
  • Kohler KG125R 125kW 3-Phase 120/208V Standby Generator - KG125R-QS5

    Kohler KG125R 125kW 3-Phase 120/208V Standby Generator - KG125R-QS5

    SKU: PES-PS-GEN-0267
    MPN NO

    KG125R-QS5

    Cell / Type

    Generators

    Kohler
    $43,545.86 USD
    $43,545.86 USD
    In stock
  • Kohler KG80R 80kW 3-Phase 120/208V Standby Generator – Aluminum Enclosure - KG80R-QS5

    Kohler KG80R 80kW 3-Phase 120/208V Standby Generator – Aluminum Enclosure - KG80R-QS5

    SKU: PES-PS-GEN-0279
    MPN NO

    KG80R-QS5

    Cell / Type

    Generators

    Kohler
    $28,842.71 USD
    $28,842.71 USD
    In stock
  • Kohler 60RCLA 60kW 3-Phase 208V Standby Generator – UL/CSA - 60RCLB-QS2

    Kohler 60RCLA 60kW 3-Phase 208V Standby Generator – UL/CSA - 60RCLB-QS2

    SKU: PES-PS-GEN-0287
    MPN NO

    60RCLB-QS2

    Cell / Type

    Generators

    Kohler
    $28,233.24 USD
    $28,233.24 USD
    In stock
  • Kohler KG125R-QS1 125kW 120/240V 1-Phase Standby Generator

    Kohler KG125R 125kW 1-Phase 120/240V Standby Generator - KG125R-QS1

    SKU: PES-PS-GEN-0269
    MPN NO

    KG125R-QS1

    Cell / Type

    Generators

    Kohler
    $43,545.86 USD
    $43,545.86 USD
    In stock
  • Kohler KG125R-QS3 125kW 120/240V 3-Phase Standby Generator

    Kohler KG125R 125kW 3-Phase 120/240V Standby Generator - KG125R-QS3

    SKU: PES-PS-GEN-0270
    MPN NO

    KG125R-QS3

    Cell / Type

    Generators

    Kohler
    $43,545.86 USD
    $43,545.86 USD
    In stock
  • Kohler 48RCLB-QS8 48kW 277/480V 3-Phase generator

    Kohler 48RCLB 48kW 3-Phase 277/480V Standby Generator – 4P7BX Alternator - 48RCLB-QS8

    SKU: PES-PS-GEN-0296
    MPN NO

    48RCLB-QS8

    Cell / Type

    Generators

    Kohler
    $25,485.13 USD
    $25,485.13 USD
    In stock

About Commercial Standby Generators

For a business, backup power is not about comfort — it is about revenue. A grocery store loses its cold chain in hours; a data room overheats in minutes; a manufacturer scraps a production run on a single voltage sag. Commercial standby generators are the insurance policy that pays out every time the grid fails: permanently installed, self-testing, and restoring full power automatically in seconds through an automatic transfer switch.

Commercial systems differ from residential units in every way that matters. Liquid-cooled engines — the same architecture as a car engine — run continuously for days, not the air-cooled duty cycle of home units. Three-phase output at 208V, 240V, or 480V powers commercial panels, rooftop HVAC, and industrial equipment. Fuel choices trade convenience against runtime: natural gas never needs refilling where utility service exists, propane stores indefinitely on-site, and diesel delivers the best load response and runtime per gallon for the largest loads. Sizing runs from 30kW for small retail to 150kW and beyond for grocery, agricultural, and light industrial facilities.

Inventory in this category moves with project cycles. Whether you are protecting one storefront or speccing a campus, send us your electrical service details, critical loads, and fuel availability — our team sizes commercial backup power systems daily and will quote the generator, transfer switch, and freight as one package. Contact PES Supply for current stock and lead times.

Commercial Standby Generators are essential for any business that demands uninterrupted power. Whether you're protecting critical equipment, maintaining operations during outages, or ensuring safety, commercial standby generators deliver reliable performance when you need it most. These systems are more than just backup power — they are peace of mind.

Why Invest in Commercial Standby Generators?

Power outages can strike without warning, caused by severe weather, grid instability, or infrastructure failures. For businesses, even a short interruption can result in lost revenue, data corruption, or compromised safety. Commercial Standby Generators are built to automatically detect power loss and instantly provide electricity, keeping vital systems running continuously.

Unlike portable generators, which require manual setup and limited fuel capacity, commercial standby generators are permanently installed, connected directly to your electrical system and fuel supply. This ensures seamless transition and extended runtime without human intervention. For enterprises like hospitals, data centers, retail stores, and manufacturing plants, this level of reliability is non-negotiable.

Key Features of Commercial Standby Generators

Automatic Operation

One of the most significant advantages of Commercial Standby Generators is automatic activation. When the utility power fails, the generator senses the outage and starts within seconds. This prevents downtime for critical systems such as HVAC, lighting, security alarms, and essential machinery.

Robust and Durable Design

Commercial environments demand power solutions built to withstand heavy usage and harsh conditions. Commercial Standby Generators are engineered with durable materials and components that deliver long-term reliability. They are capable of handling high electrical loads for extended periods, ensuring your business operations stay up and running.

Flexible Fuel Options

These generators are available with a range of fuel sources including diesel, natural gas, and propane. Each option has its benefits:

  • Diesel provides high energy density and excellent performance for heavy loads.
  • Natural gas offers cleaner emissions and continuous supply through utility pipelines.
  • Propane is ideal where natural gas is unavailable, offering stable fuel storage.

Choosing the right fuel type for your Commercial Standby Generators depends on your facility’s needs, fuel availability, and runtime requirements.

Applications of Commercial Standby Generators

Healthcare Facilities

Hospitals, clinics, and medical laboratories rely on continuous power to support life-saving equipment, refrigeration for medications, and digital record systems. Commercial Standby Generators ensure that patients are safe and critical care remains uninterrupted during power disruptions.

Data Centers and IT Infrastructure

Data centers house servers and networking equipment that require constant power. Even milliseconds of outage can lead to data loss or system instability. With Commercial Standby Generators, data centers can sustain operations until utility power returns or backup systems engage.

Retail and Hospitality

Stores, hotels, and restaurants depend on electricity for lighting, point-of-sale systems, refrigeration, and guest comfort. Power outages can lead to lost sales and dissatisfied customers. Installing Commercial Standby Generators helps businesses maintain service quality and protect perishable inventory.

Industrial and Manufacturing

Manufacturing plants and industrial facilities often operate large machinery that cannot simply be shut down. Commercial Standby Generators support critical production lines and guarantee operational continuity, minimizing costly delays and disruptions.

Sizing and Customization

Choosing the right size and configuration for your Commercial Standby Generators is crucial. Undersized generators may fail under load, while oversized units run inefficiently. Our expert team analyzes your power requirements — including starting currents for motors and peak loads — to design tailored generator systems.

Additional custom options include:

  • Automatic Transfer Switches (ATS): Seamlessly switches power from utility to generator.
  • Remote Monitoring: Allows you to track generator status and performance in real-time.
  • Sound Attenuated Enclosures: Reduces noise levels for installations near occupied spaces.
  • Paralleling Systems: Combine multiple generator units for redundancy and scalability.

Installation and Maintenance

Proper installation ensures that your Commercial Standby Generators operate safely and efficiently. Our certified technicians handle the entire process, from site assessment and permitting to final commissioning. We follow industry best practices to integrate your generator system with existing electrical infrastructure.

Routine maintenance is equally important. Scheduled inspections, load testing, and component servicing help prevent unexpected failures. A proactive maintenance plan extends the life of your generator and ensures peak performance year after year.

Benefits That Matter

Investing in Commercial Standby Generators offers tangible benefits:

  • Uninterrupted Operations: Maintain business continuity during power outages.
  • Enhanced Safety: Keep emergency systems like lighting and alarms operational.
  • Regulatory Compliance: Meet industry-specific backup power requirements.
  • Increased Resilience: Protect equipment and data from electrical disruptions.
  • Reduced Downtime Costs: Minimize revenue losses associated with outages.

Every business deserves a reliable backup power solution that aligns with its operational goals. With our range of high-performance Commercial Standby Generators, you get advanced technology, customizable options, and expert support to safeguard your facility.

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Popular Commercial Standby Generators models & specs