Powerhouse Performance: The Cummins DQGAA 1250 kW Diesel Generator Overview

When it comes to industrial power generation, few names carry as much weight as Cummins. And if you’re in the market for serious backup power that won’t let you down when the stakes are high, the Cummins DQGAA 1250 kW diesel generator deserves a spot at the top of your list.

Today, we’re taking a deep dive into this powerhouse unit: breaking down the brand reputation, technical specifications, and standout features that make it a go-to choice for facilities that simply can’t afford downtime. Plus, we’ve got one in stock right now (CSDG# 4915), and we have similar units ready to ship from our inventory at Central States Diesel Generators.

Let’s get into it.

The Cummins Legacy: A Brand Built on Reliability

If you’ve spent any time around industrial equipment, you already know Cummins. Founded in 1919, this company has over a century of experience designing and manufacturing engines, generators, and power systems that perform under pressure.

What sets Cummins apart? It comes down to a few things:

• Proven engineering: Cummins doesn’t cut corners. Their generators are built with robust components designed for longevity.
• Global support network: With distributors and service centers worldwide, getting parts and support is never a headache.
• Industry trust: From data centers to hospitals to manufacturing plants, Cummins generators are trusted by facilities where power interruptions simply aren’t an option.

When you’re shopping for a diesel generator that needs to deliver day after day, year after year, Cummins is a name you can count on. Curious how Cummins stacks up against other big names? Check out our comparison: Cummins vs Cat Diesel Generator: Which Is Right for You?

Meet the QSK50-G4 Engine: The Heart of the DQGAA

At the core of the Cummins DQGAA sits the legendary QSK50-G4 engine: and this is where things get impressive.

The QSK50-G4 is a cast iron V-16 cylinder beast with a 50.3-liter displacement. It’s turbocharged and features low-temperature aftercooling, which means it runs efficiently while keeping emissions in check. This engine was specifically engineered as a rugged 4-cycle industrial diesel that delivers:

• Reliable power output
• Low emissions
• Fast response to load changes

We’re talking about an engine that cranks out 2,220 horsepower at a rated speed of 1800 RPM. The compression ratio sits at 15:1, optimizing fuel efficiency without sacrificing performance.

One of the standout features is the modular common rail fuel system with dual-element 10-micron fuel filtration and water separation. This keeps your fuel clean and your engine running smoothly, even in demanding conditions. Maximum fuel flow clocks in at 241 US gallons per hour, so you know this unit is built for heavy-duty applications.

Technical Specifications: What You’re Getting

Let’s break down the key specs on this particular unit (CSDG# 4915):

The generator puts out 1562 kVA standby and 1375 kVA prime, making it suitable for a wide range of commercial and industrial applications. It uses a brushless, 4-pole alternator with permanent magnet generator (PMG) excitation and Class H insulation, designed for excellent load sharing and power factor correction.

One thing worth noting: this unit can accept full rated load in a single step, meeting NFPA 110 Level 1 requirements. That’s critical for facilities like hospitals and emergency services where instant power transfer is non-negotiable.

Standout Features You’ll Actually Use

Sound Attenuated Enclosure

Nobody wants a generator that sounds like a jet engine taking off every time it kicks on. The sound attenuated enclosure on this DQGAA significantly reduces noise levels, making it suitable for installations where noise restrictions apply. Whether you’re near residential areas or need to maintain a quieter work environment, this enclosure has you covered.

Want to learn more about generator noise reduction? We’ve got a resource for that: What Are Generator Silencers & Generator Mufflers?

PowerCommand Digital Controls

The PowerCommand control system is where modern technology meets industrial reliability. These digital controls give you:

• Digital governing and voltage regulation
• Isochronous kW and kVar load sharing
• Data logging for alternator metrics, engine data, load profiles, and fault history
• Optional load govern control for utility paralleling

This means easier monitoring, faster diagnostics, and more control over your power system. If you’re considering remote monitoring options, take a look at our guide: How to Leverage Remote Monitoring for Your Industrial Generator.

Sub-Base Fuel Tank

The integrated sub-base fuel tank keeps your footprint compact and your fuel supply secure. No need for separate external tanks or complicated fuel line routing. It’s a practical feature that simplifies installation and maintenance.

EPA Tier 2 Rating: What It Means for You

This 2010 unit meets EPA NSPS Stationary Emergency Tier 2 emissions standards. For stationary emergency generators, Tier 2 compliance means you’re operating within federal emissions requirements while still getting the performance you need.

Tier 2 units like this one strike a solid balance between power output and environmental responsibility. They’re widely accepted for backup power applications across most industries and jurisdictions.

Why Buy a Used Industrial Generator?

Here’s the deal: buying new isn’t always the smartest move. Quality used generators from reputable manufacturers like Cummins can offer significant cost savings while still delivering years of reliable service.

When you buy from Central States Diesel Generators, you’re not taking a gamble. Our team inspects, tests, and verifies every unit before it goes to a customer. We know the history, we know the specs, and we stand behind what we sell.

Benefits of buying used include:

• Lower upfront costs compared to new units
• Faster availability: no waiting months for manufacturing
• Proven performance: these engines have already demonstrated their reliability
• Depreciation advantages for your business

This particular Cummins DQGAA (CSDG# 4915) is a prime example of a well-maintained unit that has plenty of life left in it.

In Stock and Ready to Ship

Here’s the good news: we have this Used Cummins DQGAA 1250 kW Diesel Generator in our inventory right now, ready to ship.

But that’s not all. At Central States Diesel Generators, we maintain a rotating stock of Cummins generators and other top brands in various power ratings and configurations. Whether you need something smaller for a commercial application or a larger industrial generator for a major facility, we’ve got options.

Our inventory changes regularly, so if you don’t see exactly what you need online, give us a call. We can often source specific units or recommend alternatives that fit your requirements.

Let’s Talk About Your Power Needs

Finding the right generator isn’t just about specs on paper: it’s about matching the unit to your specific application, site conditions, and budget. That’s where our team comes in.

Ready to take the next step? Here’s what you can do:

1. View this Cummins DQGAA listing for full details and photos
2. Browse our complete inventory to see what else we have in stock
3. Contact our team directly for a personalized consultation: we’ll help you figure out the best solution for your facility and walk you through shipping options

At Central States Diesel Generators, we’re not just here to sell you equipment. We’re here to make sure you get the right power solution, delivered on time, and backed by real expertise.

Got questions? Let’s chat. Your next powerhouse is waiting.