Cummins 25kW 1PH 120/240V Home Standby Generator Quiet Connect™ RS25 1PH 120/240V

Powerful Performance, Neighborhood Friendly, Compact Design, Eco-Friendly

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Cummins 25kW 1PH 120/240V Home Standby Generator Quiet Connect™ RS25 1PH 120/240V


Quiet Connect™

The Cummins Quiet Connect™ Series offers a wide range of powerful backup solutions for many sized homes, designed specifically for its quiet and powerful performance.  The compact design and sleek aesthetics allow the generator to blend in to any yard. Cummins home standby generators are backed by an industry leading warranty and nearly 100 years of Cummins expertise powering lives from backing up hospitals and data centers to powering trucks, boats and RVs.  Cummins – powering your life.

Available ex factory. (Call to confirm)

can be export

Product can be export to the Caribbean, Latin America and other parts of the world with an additional payment.

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Additional Info

Cummins 25kW 1PH 120/240V Home Standby Generator Quiet Connect™ RS25 1PH 120/240V

Details and Specifications


  • Designed to be extremely quiet and neighborhood friendly
  • Compact and aesthetically pleasing design blends into your landscape
  • Generator equipped with Cummins PowerCommand electronic control to provide industry leading self-diagnostic capabilities
  • Robust design so the generator can handle even the harshest of weather conditions
  • Flexible exercise mode to suit your preference and reduces unnecessary fuel consumption, emissions and noise


  • Operates on natural gas or propane
  • Length 72.0 inches, width 34.0 inches, height 45.5 inches
  • Weight of generator is 1109 pounds
  • Sound level is 64 dB(A) at 23 feet with sound level 2 enclosure
  • Manufacturer’s 2 year warranty

Product Specifications:

Product Features


  • Natural gas/propane 1800 rpm engine
  • Engine air cleaner – normal duty
  • Electronic governor, isochronous
  • Engine starter, 12 VDC motor
  • Shutdown – low oil pressure
  • Extension – oil drain
  • Engine oil – included

Fuel System:

  • Single fuel – natural gas or propane vapor, fieldselectable


  • 60 Hz, 1 phase, 4 lead, or 3 phase, 12 lead, 120° C temperature rise at 40° C ambient
  • Exciter/voltage regulator – torque match


  • PowerCommand 1.1
  • Display language – English
  • Control mounting, right facing


  • Single circuit breaker, UL certified, right-side mounted
  • Battery charging alternator, normal duty
  • Battery charger – 6 Amp, regulated


  • Generator set cooling capability – 50° C
  • Shutdown – low coolant level
  • Engine coolant – 50/50 mixture
  • Extension – coolant drain


  • Aluminum enclosure Sound Level 1 with muffler installed, sandstone color
  • Wind rating – 180 mph

Code Compliance:

  • UL 2200
  • EPA emissions, emergency, stationary, 40CFR60
  • IBC Seismic
  • NFPA 110 capable

Generator set application

  • Coolant heater
  • Crank case vent heater
  • Large battery rack
  • Flexible fuel line
  • Literature (English) – operator’s manual, installation
  • quick guide and manual, service manual


  • Shipping pallet, poly bag


Base warranty – 2-year standby

Extended warranties available

Generator Set performance

Governor regulation class: ISO 8528 Part 1 Class G3

Voltage regulation, no load to full load: ±1.0%

Random voltage variation: ±1.0%

Frequency regulation: Isochronous

Random frequency variation: ± 0.25% @ 60 Hz

Radio frequency emissions compliance: FCC code Title 47 part 15 Class B

See Accessories section for details on kits

Engine Specifications

Design: Naturally Aspirated

Bore: 86.5 mm (3.4 in)

Stroke: 100.0 mm (3.94 in)

Displacement: 2.4 liters (143.5 in3)

Cylinder block: Cast iron, in-line 4 cylinder

Battery capacity: 550 Amps at ambient temperature of 0° F

to 32° F (-18° C to 0° C)

Battery charging alternator: 50 Amps

Starting voltage: 12-Volt, negative ground

Lube oil filter type(s): Spin -on with relief valve

Standard cooling system: 50° C (122° F) ambient cooling system

Rated speed: 1800 rpm

Fuel Supply Pressure

Minimum: kPa (in H2O): 1.5 (6.0)

Maximum: kPa (in H2O) 3.5 (14.0)

Typical Fuel Consumption:

RS25 Fuel consumption – natural gas:

ft3 / hr.247.6309.5
m3 / hr.6.98.7
RS25 Fuel consumption – LP vapor:
ft3 / hr.99.6125.4
m3 / hr.2.83.5
Sound: 69 dB(A) at 23 ft. (7 m) with sound level 1 enclosure [*]
Rated amp[**] (NG / LPV): 104.2/104.2
[*] Quietest point at a normal load.
 Sound performance may be affected by installation.
[**] Derating guidelines: Natural Gas: Engine power available up to 0m (0 ft) at ambient temperatures up to 25°C
(77°F). Above these elevations derate at 4% per 305 m (1000 ft) and 2% per 10°C above 25°C (77°F). Propane:
Engine power available up to 114 m (375 ft) at ambient temperatures up to 25°C (77°F). Above these elevations
derate at 4% per 305 m (1000 ft) and 2% per 10°C above 25°C (77°F).

PRODUCT Related documents:

Genset Spec Sheet

IBC Seismic Certificate of Compliance

IBC Seismic Installation Requirements

Outline Drawing



Wiring Diagram, Genset

EPA Exhaust Emission Compliance Statement

Exhaust Emission Data Sheet

Foundation Drawing

Additional Info
Weight1109 lbs
Dimensions72 × 34 × 45.5 in


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