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Diesel Generators

Diesel Generators and Sound Proof Generators are always in stock and readily available. We supply Cummins, CAT and Perkins diesel generators and we are fully registered UK dealers enabling us to not only supply and install your generator under manufactures approval, but we also provide valuable backup and diesel generator field support when you need it. Read More

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Enquiry

Please advise what model or size generator you are enquiring about

Diesel Generators For Sale – Generator Warehouse

Looking for reliable diesel generators? At Generator Warehouse, we stock and supply premium-quality diesel generators from leading brands like Cummins, CAT, and Perkins. As fully registered UK dealers, we provide generators backed by manufacturer approval, ensuring seamless supply, installation, and ongoing support.

Why Choose Generator Warehouse for Diesel Generators?

  1. Trusted Brands: We partner with world-renowned manufacturers to deliver durable and high-performance diesel generators for all applications.
  2. UK & Global Supply: Whether you’re based in the UK or require delivery worldwide, we’ve got you covered.
  3. Comprehensive Services: From delivery and installation to commissioning and ongoing maintenance, our team handles every step with expertise and efficiency.
  4. Wide Range of Sizes & Applications:
    • Small Petrol Generators: Ideal for residential and light commercial use.
    • Industrial Diesel Generators: Perfect for large-scale operations, including hospitals, data centres, construction sites, commercial offices, and retail.

Diesel Generator Services You Can Rely On

At Generator Warehouse, we go beyond supply. Our expert team ensures your generator is ready to perform when you need it most:

  • Delivery & Installation: We handle transportation and professional setup.
  • Commissioning: Our engineers ensure your generator is tested and fully operational.
  • Maintenance & Support: Protect your investment with our field support and maintenance packages.

Flexible Delivery & Availability

Delivery times vary depending on stock levels and the location of your order. With a strong inventory and efficient logistics, we aim to minimize lead times and meet your power requirements quickly.


Whether you need a small petrol generator or an industrial-grade diesel powerhouse, Generator Warehouse has the expertise, stock, and services to deliver. Contact us today to find the perfect generator for your needs!

FAQs about Diesel Generators

What are the benefits of using a diesel generator?

  • eliability: Diesel generators are known for their durability and consistent performance.
  • Fuel Efficiency: Diesel engines consume less fuel compared to petrol engines for the same power output.
  • Long Lifespan: With proper maintenance, diesel generators can last longer than other types.
  • Versatility: They can be used in various industries such as construction, healthcare, retail, and data centers.
  • High Power Output: Diesel generators are ideal for heavy-duty applications and industrial use.

What sizes of diesel generators are available?

We stock Diesel Generators from a range from small portable units (1-10 kVA) for home use to large industrial models (up to 3000 kVA or more) for factories, hospitals, and data centers. The size you need depends on the power requirements of your equipment or facility.

ow do I determine the right size diesel generator for my needs?

To choose the correct generator size, calculate the total power consumption of the devices or equipment you want to run during an outage. Add a 20-30% buffer for future expansion and to account for start-up loads of motors or appliances. For professional sizing, consult a generator expert.

Can diesel generators run continuously?

Yes, diesel generators are designed to run for extended periods, especially prime and continuous-rated generators. However, regular maintenance is essential for optimal performance. Standby generators are typically used for shorter durations during outages.

How often should a diesel generator be serviced?

Diesel generators should undergo regular maintenance every 250 to 500 hours of operation or every 6 months, whichever comes first. This includes oil and filter changes, coolant checks, fuel system inspection, and load testing to ensure reliability.

Are diesel generators noisy?

Diesel generators can be noisy, but modern models are equipped with noise-reducing technology such as soundproof enclosures and mufflers. Silent and super-silent diesel generators are available for noise-sensitive environments like residential areas or hospitals.

Are diesel generators environmentally friendly?

While diesel generators emit emissions, advancements in technology have made them more eco-friendly. Models compliant with Stage V emission regulations produce significantly lower levels of pollutants. Additionally, regular maintenance and using cleaner diesel fuels can reduce environmental impact.

What’s the difference between single-phase and three-phase diesel generators?

  • Single-phase generators are designed for residential and light commercial use, typically powering small equipment and appliances.
  • Three-phase generators are ideal for industrial and commercial applications where higher power is needed, such as powering large machinery or multiple devices simultaneously.

How much fuel does a diesel generator consume?

Fuel consumption depends on the generator’s size and load. For example, a 100 kVA generator might consume about 20-25 liters of diesel per hour at 75% load. Fuel efficiency improves when the generator runs at optimal loads (50-75%).

What is the lifespan of a diesel generator?

With proper maintenance, a diesel generator can last 10,000 to 30,000 hours of operation, which could equate to 20-30 years for standby use. Regular servicing and using high-quality fuel are key to longevity

Can I connect my diesel generator to my home or business?

Yes, diesel generators can be connected to homes or businesses using an Automatic Transfer Switch (ATS) or a manual transfer switch. The ATS automatically switches the power supply to the generator during outages and back to the mains when power is restored.

Can diesel generators be used indoors?

Diesel generators should not be used indoors unless installed in a properly ventilated area or equipped with an exhaust system to prevent carbon monoxide buildup. Indoor installations must comply with local regulations and safety standards.