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Maximum Diesel Power for Luxury Motorhomes
The Cummins Onan QD 12500 Diesel RV Generator A055E844 is designed for RV owners who refuse to compromise on comfort, convenience, or performance. Built around the proven 12.5HDKCB-11506 platform, this premium diesel-powered generator delivers 12,500 watts of dependable onboard electricity for the largest and most demanding motorhomes on the road.
Whether you're operating multiple air conditioning systems, residential appliances, battery charging systems, entertainment equipment, induction cooking appliances, or extended off-grid living setups, the QD 12500 is engineered to provide dependable power without sacrificing comfort.
As one of the most capable RV generators in the Cummins Onan lineup, the QD 12500 is the preferred choice for luxury diesel coaches, full-time RV travelers, and owners seeking commercial-grade onboard power performance.
Key Features
- 12,500 watts of diesel-powered RV electricity
- Quiet Diesel™ technology
- Pure sine wave electrical output
- Liquid-cooled diesel engine
- Designed for luxury diesel motorhomes
- Digital voltage regulation
- Microprocessor-based controls
- Advanced onboard diagnostics
- Low-vibration mounting system
- Supports multiple rooftop air conditioners
- Commercial-grade durability
- Trusted Cummins Onan engineering
Best Uses
- Luxury Class A diesel motorhomes
- Full-time RV living
- Extended off-grid camping
- Multiple air conditioner operation
- Residential-style RV appliances
- Long-distance travel
- High-demand electrical systems
- Luxury coach conversions
- Generator replacement projects
- Premium RV power applications
Built for the Largest RV Electrical Demands
Modern luxury coaches often require significantly more power than traditional RVs. Residential refrigerators, electric cooking equipment, battery charging systems, entertainment centers, and multiple climate-control systems all place substantial demands on onboard electrical systems.
The QD 12500 was engineered specifically to support these requirements while delivering the reliability expected from a premium diesel-powered generator platform.
Run Multiple Air Conditioners with Power to Spare
The QD 12500 is designed to operate up to three 15,000 BTU rooftop air conditioners while still providing additional capacity for appliances, electronics, lighting, and other RV electrical loads. This makes it an excellent choice for travelers spending time in hot-weather destinations or full-time RV owners who demand residential-level comfort. :contentReference[oaicite:0]{index=0}
Quiet Operation for Premium Camping Experiences
The QD 12500 utilizes advanced sound attenuation, vibration isolation, and Quiet Diesel technology to help reduce operating noise. Cummins notes that the generator is quieter than National Park Service sound-level requirements, making it ideal for campgrounds, RV resorts, and remote destinations. :contentReference[oaicite:1]{index=1}
What's Included
- Cummins Onan QD 12500 Diesel Generator
- Model 12.5HDKCB-11506
- Factory Documentation
- Operator Information
- Warranty Documentation
Technical Specifications
| Manufacturer | Cummins Onan |
| Series | QD 12500 |
| Part Number | A055E844 |
| Model Number | 12.5HDKCB-11506 |
| Rated Output | 12,500 Watts |
| Voltage | 120/240V |
| Frequency | 60 Hz |
| Phase | Single Phase |
| Fuel Type | Diesel |
| Engine Type | Liquid-Cooled Diesel Engine |
| Starting System | Remote Electric Start |
| Output Type | Pure Sine Wave |
| Approximate Weight | 787–794 lbs |
| Dimensions (L x W x H) | 41.4" x 24.5" x 27" |
| Application | Luxury Motorhome / RV Power |
Frequently Asked Questions
What fuel does the A055E844 use?
The QD 12500 operates on diesel fuel and is designed specifically for diesel-powered motorhomes and luxury RV applications.
Can the QD 12500 run three air conditioners?
Yes. The QD 12500 is designed to operate up to three 15,000 BTU rooftop air conditioners while still providing additional power capacity for other onboard loads. :contentReference[oaicite:2]{index=2}
Why choose a diesel generator for a luxury motorhome?
Many diesel coach owners prefer a diesel generator because it utilizes the same fuel source as the vehicle, simplifying fuel management while supporting long runtime and durability.
Is the QD 12500 considered a quiet generator?
Yes. Quiet Diesel technology, advanced sound insulation, and vibration reduction systems help minimize operating noise. :contentReference[oaicite:3]{index=3}
Does this generator provide clean power for electronics?
Yes. The QD 12500 produces pure sine wave power suitable for modern electronics and sensitive RV equipment. :contentReference[oaicite:4]{index=4}
Is this generator suitable for full-time RV living?
Absolutely. The QD 12500 is commonly selected by full-time RV travelers and owners of luxury diesel coaches who depend on consistent electrical power every day.
Can it support residential appliances?
Yes. The QD 12500 is designed to power high-demand appliances commonly found in luxury motorhomes.
Does the generator include diagnostic capabilities?
Yes. Microprocessor-based controls provide onboard diagnostics and troubleshooting support. :contentReference[oaicite:5]{index=5}
Is professional installation recommended?
Yes. Professional installation is recommended to ensure proper fuel, cooling, exhaust, and electrical integration.
Who is the ideal buyer for the QD 12500?
The QD 12500 is ideal for luxury diesel motorhome owners, full-time RV travelers, and users requiring maximum onboard electrical capacity.
Why Buy From All Pro Generators?
- Family-Owned Since 2018
- Free Shipping Across the Continental United States
- Authorized Dealer Support
- Competitive Pricing
- Knowledgeable Generator Specialists
- U.S.-Based Customer Service
- Support Available 7 Days Per Week
- Call 954-249-2314 for Expert Assistance
| Shipping | This item ships to |
 |
Fast Shipping in the USA. Items ship the same or next day We process orders 7 days a week to ensure the fastest shipping possible. All generators are shipped as fast as possible out of several US locations to ensure the fastest delivery. |
|
 |
We Put Our Customers First We have done the research for you to find the best manufacturers with the best warranties. Every unit on our site is covered by a high quality manufacturers warranty. |
|
 |
We offer the absolute lowest price we can offer |
|
 |
We insist that you love our service. If you're unhappy for any reason whatsoever, just let us know and we'll bend over backwards to make things right again. |
|
 |
Ordering from AllProGenerators.com is 100% safe and secure so you can rest easy. Your personal details are never shared, sold or rented to anyone either. |
Description
Maximum Diesel Power for Luxury Motorhomes
The Cummins Onan QD 12500 Diesel RV Generator A055E844 is designed for RV owners who refuse to compromise on comfort, convenience, or performance. Built around the proven 12.5HDKCB-11506 platform, this premium diesel-powered generator delivers 12,500 watts of dependable onboard electricity for the largest and most demanding motorhomes on the road.
Whether you're operating multiple air conditioning systems, residential appliances, battery charging systems, entertainment equipment, induction cooking appliances, or extended off-grid living setups, the QD 12500 is engineered to provide dependable power without sacrificing comfort.
As one of the most capable RV generators in the Cummins Onan lineup, the QD 12500 is the preferred choice for luxury diesel coaches, full-time RV travelers, and owners seeking commercial-grade onboard power performance.
Key Features
- 12,500 watts of diesel-powered RV electricity
- Quiet Diesel™ technology
- Pure sine wave electrical output
- Liquid-cooled diesel engine
- Designed for luxury diesel motorhomes
- Digital voltage regulation
- Microprocessor-based controls
- Advanced onboard diagnostics
- Low-vibration mounting system
- Supports multiple rooftop air conditioners
- Commercial-grade durability
- Trusted Cummins Onan engineering
Best Uses
- Luxury Class A diesel motorhomes
- Full-time RV living
- Extended off-grid camping
- Multiple air conditioner operation
- Residential-style RV appliances
- Long-distance travel
- High-demand electrical systems
- Luxury coach conversions
- Generator replacement projects
- Premium RV power applications
Built for the Largest RV Electrical Demands
Modern luxury coaches often require significantly more power than traditional RVs. Residential refrigerators, electric cooking equipment, battery charging systems, entertainment centers, and multiple climate-control systems all place substantial demands on onboard electrical systems.
The QD 12500 was engineered specifically to support these requirements while delivering the reliability expected from a premium diesel-powered generator platform.
Run Multiple Air Conditioners with Power to Spare
The QD 12500 is designed to operate up to three 15,000 BTU rooftop air conditioners while still providing additional capacity for appliances, electronics, lighting, and other RV electrical loads. This makes it an excellent choice for travelers spending time in hot-weather destinations or full-time RV owners who demand residential-level comfort. :contentReference[oaicite:0]{index=0}
Quiet Operation for Premium Camping Experiences
The QD 12500 utilizes advanced sound attenuation, vibration isolation, and Quiet Diesel technology to help reduce operating noise. Cummins notes that the generator is quieter than National Park Service sound-level requirements, making it ideal for campgrounds, RV resorts, and remote destinations. :contentReference[oaicite:1]{index=1}
What's Included
- Cummins Onan QD 12500 Diesel Generator
- Model 12.5HDKCB-11506
- Factory Documentation
- Operator Information
- Warranty Documentation
Technical Specifications
| Manufacturer | Cummins Onan |
| Series | QD 12500 |
| Part Number | A055E844 |
| Model Number | 12.5HDKCB-11506 |
| Rated Output | 12,500 Watts |
| Voltage | 120/240V |
| Frequency | 60 Hz |
| Phase | Single Phase |
| Fuel Type | Diesel |
| Engine Type | Liquid-Cooled Diesel Engine |
| Starting System | Remote Electric Start |
| Output Type | Pure Sine Wave |
| Approximate Weight | 787–794 lbs |
| Dimensions (L x W x H) | 41.4" x 24.5" x 27" |
| Application | Luxury Motorhome / RV Power |
Frequently Asked Questions
What fuel does the A055E844 use?
The QD 12500 operates on diesel fuel and is designed specifically for diesel-powered motorhomes and luxury RV applications.
Can the QD 12500 run three air conditioners?
Yes. The QD 12500 is designed to operate up to three 15,000 BTU rooftop air conditioners while still providing additional power capacity for other onboard loads. :contentReference[oaicite:2]{index=2}
Why choose a diesel generator for a luxury motorhome?
Many diesel coach owners prefer a diesel generator because it utilizes the same fuel source as the vehicle, simplifying fuel management while supporting long runtime and durability.
Is the QD 12500 considered a quiet generator?
Yes. Quiet Diesel technology, advanced sound insulation, and vibration reduction systems help minimize operating noise. :contentReference[oaicite:3]{index=3}
Does this generator provide clean power for electronics?
Yes. The QD 12500 produces pure sine wave power suitable for modern electronics and sensitive RV equipment. :contentReference[oaicite:4]{index=4}
Is this generator suitable for full-time RV living?
Absolutely. The QD 12500 is commonly selected by full-time RV travelers and owners of luxury diesel coaches who depend on consistent electrical power every day.
Can it support residential appliances?
Yes. The QD 12500 is designed to power high-demand appliances commonly found in luxury motorhomes.
Does the generator include diagnostic capabilities?
Yes. Microprocessor-based controls provide onboard diagnostics and troubleshooting support. :contentReference[oaicite:5]{index=5}
Is professional installation recommended?
Yes. Professional installation is recommended to ensure proper fuel, cooling, exhaust, and electrical integration.
Who is the ideal buyer for the QD 12500?
The QD 12500 is ideal for luxury diesel motorhome owners, full-time RV travelers, and users requiring maximum onboard electrical capacity.
Why Buy From All Pro Generators?
- Family-Owned Since 2018
- Free Shipping Across the Continental United States
- Authorized Dealer Support
- Competitive Pricing
- Knowledgeable Generator Specialists
- U.S.-Based Customer Service
- Support Available 7 Days Per Week
- Call 954-249-2314 for Expert Assistance
Shipping
| Shipping | This item ships to |
Delivery
|
Fast Shipping in the USA. Items ship the same or next day We process orders 7 days a week to ensure the fastest shipping possible. All generators are shipped as fast as possible out of several US locations to ensure the fastest delivery. |
|
Why Buy From Us
|
We Put Our Customers First We have done the research for you to find the best manufacturers with the best warranties. Every unit on our site is covered by a high quality manufacturers warranty. |
|
|
We offer the absolute lowest price we can offer |
|
|
We insist that you love our service. If you're unhappy for any reason whatsoever, just let us know and we'll bend over backwards to make things right again. |
|
|
Ordering from AllProGenerators.com is 100% safe and secure so you can rest easy. Your personal details are never shared, sold or rented to anyone either. |
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