At National Generator Sales, we understand that a reliable power source isn’t a luxury – it’s a necessity. Whether you’re running a busy construction site, managing a hospital, operating a data centre, or simply looking for dependable backup power for your business or home, we’ve got you covered. With over 45 years of experience in power generation and a reputation for excellence, we’re proud to be one of the U.K.’s leading providers of diesel generators and power solutions.
Based just 36 miles from London and 15 miles from Cambridge, our central location allows us to serve a wide range of industries across the U.K. and internationally. Through our in-depth blog, we aim to empower our customers with the knowledge they need to make informed decisions about their power needs. In this post, we’ll provide a comprehensive guide to diesel generators – what they are, how they work, the types available, and how to choose the right one for your needs.
Our Guide to Diesel Generators
Diesel generators are some of the most reliable and versatile power solutions on the market today. Designed to provide uninterrupted and stable power, they’re used across countless industries, including construction, healthcare, agriculture, and telecommunications. But with so many options available, understanding the different types and benefits is key to finding the perfect generator for your needs.
What is a Diesel Generator?
A diesel generator is a combination of a diesel engine and an electric generator (alternator). It converts the chemical energy in diesel fuel into electrical energy. These generators are known for their durability, efficiency, and ability to operate for long periods without interruption, making them ideal for both prime power and backup applications.
Types of Diesel Generators Available at National Generator Sales
We proudly offer a wide selection of diesel generators from leading global brands, as well as our own trusted in-house models. Each type serves unique requirements, from compliance and fuel efficiency to rugged dependability and international versatility. Here’s a breakdown of our key ranges:
Renowned for their robust engineering and reliability, Baudouin diesel generators are ideal for heavy-duty industrial and commercial applications. Their engines are known for long lifespans and low operating costs. With a reputation built on over a century of marine and industrial engineering excellence, Baudouin engines are designed to perform in the most demanding environments. These generators are an excellent choice for continuous operation and critical systems where downtime is not an option.
A global powerhouse in power systems, Cummins diesel generators deliver exceptional performance and reliability. They are known for low emissions, efficient fuel consumption, and innovative technology integration. Cummins’ advanced control systems offer real-time monitoring and diagnostics, enhancing operational efficiency and peace of mind. Whether for backup or continuous duty, these generators deliver robust power across sectors including healthcare, construction, and manufacturing.
If you’re looking to meet stringent emission standards, our EU Stage V-compliant generators are perfect. Designed with the latest in green technology, they offer clean, efficient power without compromising on output. These generators are ideal for urban environments, environmentally sensitive zones, and public projects where compliance with government regulations is crucial. Their advanced exhaust after-treatment systems reduce harmful particulates and nitrogen oxides.
High Voltage Diesel Generators
For high-demand environments, such as large manufacturing plants or data centres, our high-voltage diesel generators deliver the power you need efficiently and reliably. They are engineered to support heavy electrical loads and can be integrated into complex power systems with precision. These models offer excellent scalability and are built with robust alternators and switchgear compatibility.
Combining value with performance, our own-brand generators offer a cost-effective solution with no compromise on quality. Ideal for businesses seeking dependable power at a competitive price point.
These models are assembled and tested in-house to ensure quality control and meet diverse customer needs. They’re especially popular with SMEs and contractors who want durability without the price tag of premium brands.
With a rich legacy in engine manufacturing, Perkins diesel generators are built for durability, fuel efficiency, and long service intervals – perfect for demanding applications.
Trusted in agriculture, construction, and backup power systems, Perkins engines are designed to handle tough conditions with ease. Their global support network ensures you have access to parts and service no matter where you are.
At National Generator Sales, we take pride in offering one of the most comprehensive ranges of diesel generators in the U.K. – all backed by expert guidance, bespoke configurations, and nationwide support. Whether you’re seeking a top-tier global brand or a high-performance own-brand alternative, we’re here to help you make the right choice. Explore our full range online today or get in touch for personalised advice from our expert team.
How to Pick the Right Generator: Things to Consider
Choosing the right diesel generator is more than just looking at price and power output. There are several critical factors to take into account to ensure you select a model that meets your operational demands and future growth. Here’s what to consider:
1. Power Requirements
Start by calculating your total power needs in kilowatts (kW) or kilovolt-amperes (kVA). Do you need the generator for prime, continuous or standby use? Overestimating or underestimating your needs can lead to inefficiency or inadequate power supply.
2. Application Type
Are you using the generator in a hospital, on a construction site, for agricultural work, or as a backup for your business? Different environments call for different specifications, including noise levels, portability, and fuel consumption.
3. Compliance & Emissions
For operations in regulated zones, Stage V compliance may be necessary. Our EU Stage V diesel generators ensure you remain within legal environmental parameters.
4. Fuel Efficiency
Diesel generators are known for their fuel efficiency, but some models outperform others. If you’ll be using your generator frequently, opt for a model with a lower litres-per-kWh consumption rate.
5. Portability and Installation
Will the generator be in a fixed location, or do you need it to move between sites? We offer both static and portable solutions to suit a range of logistical needs.
6. Load Management
Consider whether you need automatic load transfer switches (ATS), which seamlessly switch power sources during an outage, or advanced controllers for load balancing across multiple units.
7. Noise Levels
For residential or noise-sensitive areas, opt for a silent or low-noise diesel generator. Many of our models come with sound-attenuated enclosures to minimise disturbance.
Choosing the right generator is all about aligning your operational needs with the right features, capacity, and compliance requirements. If you’re unsure where to begin, our expert team at National Generator Sales is here to guide you through every step of the decision-making process, ensuring you invest in a solution that’s built to last and ready to perform.
The Benefits of Diesel Generators
Diesel generators offer a wide array of benefits that make them a popular choice for various applications, from small businesses to large industrial facilities. Here’s why they’re considered the gold standard in power backup and generation:
Fuel Efficiency
Diesel engines consume significantly less fuel compared to their petrol counterparts, especially at higher loads. This translates into lower operational costs over time. They’re particularly efficient when running for long durations, making them ideal for prime and continuous power use cases.
Longevity and Durability
Built to withstand demanding environments, diesel generators can run for thousands of hours with minimal wear and tear. Their robust engine design means fewer breakdowns and longer service intervals. With proper care, a quality diesel generator can last decades, making it a sound long-term investment.
Low Maintenance Costs
Unlike petrol engines, diesel generators do not have spark plugs or carburettors, which reduces the number of maintenance components. With regular servicing, they offer long-term reliability. Fewer moving parts mean fewer failure points, which helps reduce the likelihood of unexpected downtime.
High Power Output
Diesel generators can handle large power loads effortlessly, making them ideal for heavy-duty equipment and applications that require consistent, high-output performance. They’re commonly used in sectors like healthcare, construction, and data centres where power stability is critical.
Safe Fuel Storage
Diesel fuel is less flammable than petrol, making it safer to store, transport, and use, particularly in high-risk environments. This makes diesel generators a trusted option for emergency response centres, hospitals, and manufacturing facilities.
Reliable in Remote Locations
With fewer dependencies on grid infrastructure, diesel generators are perfect for remote or off-grid areas. They’re often used in rural farming, mining, and construction sites where power access is limited. Their rugged design and dependable start-up performance make them a favourite in challenging terrains and isolated regions.
24/7 Uninterrupted Power
Need power round the clock? Diesel generators are designed for continuous operation, especially when connected to automated start systems and fuel monitoring. This ensures critical operations stay online without interruption, no matter the circumstances.
Environmentally Improved Models Available
Modern diesel generators, such as our EU Stage V-compliant range, offer lower emissions and higher fuel efficiency, making them a greener alternative to older models. With advanced exhaust treatment systems and cleaner fuel burn, they help businesses stay compliant while reducing their environmental impact.
Whether you’re a business owner preparing for power outages or a contractor working on a time-sensitive project, diesel generators offer a blend of reliability, cost-effectiveness and power that few alternatives can match.
Powering Progress, Empowering You
In today’s fast-paced, digitally connected world, a consistent power supply isn’t just important – it’s essential. Diesel generators provide a dependable, efficient, and versatile solution that meets the needs of a wide array of sectors and applications. At National Generator Sales, we don’t just sell generators – we partner with you to deliver tailor-made power solutions that work, every single time.
With decades of industry expertise, top-tier products from trusted manufacturers, and custom power configurations available, we’re here to ensure you’re never left in the dark.
Looking for a diesel generator that ticks all the boxes? Contact our friendly team today and let’s find your perfect power solution.
FAQs
What is a diesel generator used for?
Diesel generators provide electricity in areas without access to the grid or during power outages. They’re used in industries, hospitals, construction sites, and even for residential backup power.
How long do diesel generators last?
With regular maintenance, diesel generators can last between 15,000 to 50,000 hours, depending on usage and model.
Are diesel generators better than petrol?
Diesel generators are typically more fuel-efficient, longer-lasting, and more suited to heavy-duty tasks than petrol models.
How do I maintain a diesel generator?
Regular servicing includes oil changes, fuel filter replacements, coolant checks, and inspections of belts and hoses. Maintenance intervals vary by manufacturer.
What size generator do I need?
This depends on your power requirements. Our experts can help calculate your kVA or kW needs to recommend the ideal model.
Are diesel generators noisy?
Some models can be loud, but many modern generators come with soundproof enclosures or are designed for low-noise operation.
Can diesel generators be used indoors?
No. Diesel generators must be used outdoors or in well-ventilated areas to avoid harmful exhaust fumes.
How much fuel does a diesel generator use?
Fuel usage depends on the load and generator size. For example, a 100kVA generator at 75% load may consume around 20–25 litres per hour.
Do you offer installation services?
Yes! National Generator Sales offers comprehensive installation services, including site assessment, delivery, and setup.
Can I get a custom power solution?
Absolutely. We specialise in customised power configurations to suit unique business or industrial requirements.
Ready to Get Started?
Whether you’re just starting to explore diesel generators or are ready to invest in a high-performance model, National Generator Sales is your go-to partner for expert advice and superior service. Contact us today!
