

Model: Onan QD12500 - A055E844 I 12.5HDKCB-11506 | 120/240 Volts | Watts - 12000W DIESEL | RPM - 1800 | Circuit Breaker: 50A 2-POLE
✅ IN STOCK - 3-5 DAY LEAD TIME
Cummins Onan QD12500 Quiet Diesel Offers Reliable Power for Any RV Adventure!
Runs three air conditioners with power to spare. Quieter than National Park Service sound level requirements.
Features and Benefits:
- Computer-controlled constant speed operation - quiet diesel performance for larger RVs.
- Special sound-controlling housing encloses cooling system and muffler.
- Three-point, fully focalized mounting system reduces vibration.
- Self-diagnostic capabilities simplify troubleshooting.
- Easy, accessible maintenance points.
- Runs 2-3 rooftop air conditioners with power to spare.
- High quality, pure sine wave electrical output helps prevent damage to appliances.
Control System
- Microprocessor control
- Integrated generator set and engine control
- User and service personnel accessible diagnostics
- Over voltage, over speed and overload safety
- Low oil pressure safety
- AC alternator over temp safety
- Automatic timed glow plugs
- One touch stop
QD12500 Specifications
Physical Dimensions
- Weight: 765 lbs
- Size (L×W×H): 41.4" × 24.5" × 27"
- Sound: 68 dB(A) at 10-feet, half-load
Meets National Park Service sound level requirements (60 dB(A) @ 50 ft) for use in national parks. Typical installation will further reduce sound level.
Air Conditioning Operation
Will operate with three 15000 BTU air conditioners and an additional load of up
to 4000W at 100°F and 500 ft altitude.
Alternator
- Design: Cummins Onan brush type, drip-proof construction
- Insulation system: Class H
- Cooling: Direct drive centrifugal blower; cast aluminum housing for excellent heat transfer
- Exciter System: Electronite voltage regulator
- Bearings: Double sealed, pre-lubricated ball bearing
Engine
- Configuration: 4-cycle, liquid-cooled diesel engine
- Cylinders: 3, inline vertical
- Displacement: 100.5 cubic inches
- Maximum Power: 27 hp (20.2 kW)
- Starting System: Remote, 12V
- Oil Capacity: 5.9 quarts
Fuel Consumption
- No Load: 0.1 GPH
- Half Load: 0.48 GPH
- Full Load: 1.2 GPH
Warranty
3-year limited warranty applies to RV generator sets used in RV applications. This limited warranty covers virtually everything except routine maintenance for the first two years you own your RV generator set, and covers parts and labor on major power train and generator set parts during the third year.
Availability
In Stock - 3-5 Day Lead Time - Call us today for a shipping quote and get your RV powered up for your next adventure!
Experience the reliability and performance that has made Cummins Onan the preferred choice of RV owners for over eight decades.