What is the Cummins RS125 standby generator used for?

The Cummins RS125 is designed for commercial, light industrial, and large residential applications that require reliable backup power during utility outages. It supports critical systems such as HVAC, refrigeration, data equipment, and essential operations.

How much power does the Cummins RS125 provide?

The Cummins RS125 delivers 125kW of standby power, making it suitable for facilities with high electrical demand that need consistent, balanced three-phase power.

Is the Cummins RS125 a three-phase generator?

Yes, the RS125 operates on a 120/208V three-phase configuration, ensuring efficient and stable power distribution across commercial and industrial electrical systems.

How quiet is the Cummins RS125 generator?

With Quiet Connect technology, the Cummins RS125 operates at approximately 75 dBA at 23 feet, making it one of the quietest generators in its power class.

What fuel options are available for the Cummins RS125?

The generator features dual fuel capability, allowing it to run on either natural gas or liquid propane (LP) for added flexibility and fuel redundancy.

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Cummins RS125 125kW Standby Generator | 3-Phase 120/208V | Quiet Connect

Cummins RS125 125kW Standby Generator | 3-Phase 120/208V | Quiet Connect

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Cummins RS125 125kW Standby Generator | 3-Phase 120/208V | Quiet Connect

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$44,990.78 USD

$ $44,990.78 USD

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9+ sold

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Cummins RS125 125kW Standby Generator | 3-Phase 120/208V | Quiet Connect $44,990.78

Specifications

Datasheet

Wattage 125kW standby

Fuel Type Natural Gas / LP (Liquid Propane)

Voltage 120/208V

What is your return policy?

Returns are free in the first 30 days with no restocking or processing fees, although the customer may be responsible for paying return shipping. See our complete return policy on our Shipping, Delivery, and Returns page linked in the footer of this website.

What’s covered by your return policy?

Our returns policy covers all purchases made through Portlandia Electric Supply. For warranty issues, as authorized distributors, we honor the full manufacturer warranty of ALL the brands on our website. See our complete returns and warranty policies on our Shipping, Deliver, and Returns page.

How long will it take to receive my order?

All orders are processed within 72 hours and you can expect delivery on most orders within 5-7 business days. You will receive access to our customer portal after ordering, where it is easy to track all your shipments. See our Shipping, Delivery and Returns page for more details.

What are your financing and payment options?

We offer several ways to pay to make getting your solar kit simple:

Credit Card: if the purchase is greater than your card’s limit, you can split the cost onto multiple cards as well as Paypal, financing through Affirm, and ACH/bank transfer

You can arrange financing during the checkout process, or scroll further down this page for more details. Please note, if you'd like to finance your order, you can do so instantly, right at checkout.

How does your Lifetime Customer Support work?

Our legendary lifetime customer support has helped make us the #1 online solar retailer! We have a dedicated team of solar professionals standing by to help you navigate the world of solar with ease. From selecting the perfect solar kit to installation and beyond, we provide support and expertise at every step of the journey.If you need help with ordering, shipping, troubleshooting, expanding your system, warranty issues, or anything else you have questions about for as long as you own your Portlandia Electric Supply equipment, we’ve got you covered: we’re always only a phone call or email away.

Cummins RS125 - 125kW Quiet Connect Series 120/208V Three Phase Liquid Cooled Standby Generator - A063A442

The Cummins RS125 Quiet Connect Series Standby Generator delivers dependable 125kW of power in a 120/208V three-phase configuration, engineered to keep your commercial or industrial facility running when the grid fails. This robust, liquid-cooled generator combines Cummins' legendary reliability with advanced Quiet Connect technology, making it one of the quietest generators in its class at just 75 dBA. Whether you're protecting critical operations, maintaining productivity during outages, or safeguarding valuable equipment, the RS125 provides the commercial-grade backup power your business can depend on, even in the harshest environmental conditions.

Key Features

125kW standby power output for comprehensive commercial and industrial backup needs
120/208V three-phase system delivers efficient, balanced power distribution across your facility
Dual fuel capability (Natural Gas/LP) provides operational flexibility and fuel redundancy
Liquid-cooled engine design ensures optimal performance and extended operational life under heavy loads
Quiet Connect technology with advanced sound-dampening enclosure reduces noise to 75 dBA at 23 feet
PowerCommand 2.3 electronic control system with industry-leading self-diagnostics and remote monitoring
Extreme cold weather capability with reliable starting down to -40°F
Flexible exercise mode allows customizable testing schedules as infrequent as 2 minutes every 6 months, reducing fuel consumption and emissions
Engineered to withstand wind loads up to 180 MPH per ASCE 7-10 standards
Advanced aluminum enclosure with powder coat finish for durability and aesthetic appeal

Specifications

MPN	A063A442
Vendor	Cummins
Model	RS125
Power Output	125kW Standby
Voltage	120/208V
Phase Type	Three-Phase
Fuel Type	Natural Gas / LP (Dual Fuel)
Cooling Type	Liquid-Cooled
RPM	1800
Alternator	12-Lead
Control System	PowerCommand 2.3 Electronic Control
Sound Level	75 dBA @ 23 ft (Sound Level 1 Enclosure)
Voltage Regulation	±1%
Frequency Regulation	±0.25%
Cold Weather Start	-40°F
Wind Load Rating	180 MPH (ASCE 7-10)
Enclosure Type	Advanced Aluminum with Powder Coat Finish
Application	Commercial & Industrial Standby Power

Installation & Application

The Cummins RS125 120/208V Three-Phase Liquid Cooled Standby Generator is purpose-built for commercial facilities, light industrial operations, and large residential properties that demand reliable, high-output backup power. With its 125kW capacity and three-phase configuration, the RS125 ensures your critical systems, HVAC equipment, refrigeration units, and essential operations remain online during utility outages. The generator's liquid-cooled design maintains consistent performance even under sustained full-load conditions, while the advanced PowerCommand control system provides real-time monitoring, automatic diagnostics, and seamless transfer switching. The compact footprint and aesthetically designed enclosure allow for flexible placement near your facility without compromising your landscape or disturbing neighbors, thanks to the remarkably quiet 75 dBA operation. Installation is simplified with code-compliant design meeting EPA emissions, UL-2200 safety, and IBC Seismic standards, making it ready for the most demanding commercial applications.

Warranty & Compliance

Backed by Cummins' comprehensive 2-year base warranty with extended warranty options available
EPA emissions compliant for clean, environmentally responsible operation
UL-2200 Listed for safety and reliability
IBC Seismic certified for earthquake-prone regions
NFPA 110 capable when equipped with proper accessories and professionally installed
Meets ASCE 7-10 wind load requirements up to 180 MPH

What is your return policy?

What’s covered by your return policy?

How long will it take to receive my order?

What are your financing and payment options?

We offer several ways to pay to make getting your solar kit simple:

Credit Card: if the purchase is greater than your card’s limit, you can split the cost onto multiple cards as well as Paypal, financing through Affirm, and ACH/bank transfer

You can arrange financing during the checkout process, or scroll further down this page for more details. Please note, if you'd like to finance your order, you can do so instantly, right at checkout.

How does your Lifetime Customer Support work?

Cummins RS125 - 125kW Quiet Connect Series 120/208V Three Phase Liquid Cooled Standby Generator - A063A442

Key Features

125kW standby power output for comprehensive commercial and industrial backup needs
120/208V three-phase system delivers efficient, balanced power distribution across your facility
Dual fuel capability (Natural Gas/LP) provides operational flexibility and fuel redundancy
Liquid-cooled engine design ensures optimal performance and extended operational life under heavy loads
Quiet Connect technology with advanced sound-dampening enclosure reduces noise to 75 dBA at 23 feet
PowerCommand 2.3 electronic control system with industry-leading self-diagnostics and remote monitoring
Extreme cold weather capability with reliable starting down to -40°F
Flexible exercise mode allows customizable testing schedules as infrequent as 2 minutes every 6 months, reducing fuel consumption and emissions
Engineered to withstand wind loads up to 180 MPH per ASCE 7-10 standards
Advanced aluminum enclosure with powder coat finish for durability and aesthetic appeal

Specifications

MPN	A063A442
Vendor	Cummins
Model	RS125
Power Output	125kW Standby
Voltage	120/208V
Phase Type	Three-Phase
Fuel Type	Natural Gas / LP (Dual Fuel)
Cooling Type	Liquid-Cooled
RPM	1800
Alternator	12-Lead
Control System	PowerCommand 2.3 Electronic Control
Sound Level	75 dBA @ 23 ft (Sound Level 1 Enclosure)
Voltage Regulation	±1%
Frequency Regulation	±0.25%
Cold Weather Start	-40°F
Wind Load Rating	180 MPH (ASCE 7-10)
Enclosure Type	Advanced Aluminum with Powder Coat Finish
Application	Commercial & Industrial Standby Power

Installation & Application

Warranty & Compliance

Backed by Cummins' comprehensive 2-year base warranty with extended warranty options available
EPA emissions compliant for clean, environmentally responsible operation
UL-2200 Listed for safety and reliability
IBC Seismic certified for earthquake-prone regions
NFPA 110 capable when equipped with proper accessories and professionally installed
Meets ASCE 7-10 wind load requirements up to 180 MPH

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