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Diesel Generators

Diesel Generators for Sale


Blue Diamond Machinery has service agents Australia wide and sales and service offices located in Perth and Melbourne, enabling us to deliver the right generator to your location. Talk with our experienced diesel Generator team for the right advice to meet your requirements. We offer a range of diesel generator models and specifications including; 10kva to 700kva -1 Phase & 3 Phase- 240 or 415v diesel generators, Silent Diesel Generators- Fully enclosed sound proof canopy diesel generators, Remote start and online monitoring diesel generators.


Our diesel generator range are built tough and built to handle Australian conditions. After years of supplying to Australia’s mining, construction, and trade industries, we only stock diesel generators that are quality, reliable and well-built. We have over 30+ years of industry experience and provide leading diesel generator brands at the best price possible, saving you time and money. So, why Choose a Diesel Generator from Blue Diamond?

  • Our Diesel Generators are Built to Handle Tough Australian Conditions- we only stock leading diesel generator brands that have been tried and tested under tough Australian conditions. Built to handle Australia’s demanding trade, mining & construction site conditions, our diesel generators are built to perform under pressure.
  • Reliable & Efficient- our extensive diesel generator range deliver prime and backup power reliably and efficiently. Whether you need a diesel generator to power large trade equipment use, for commercial applications or standby & backup use, our diesel generator range will deliver power when you need it most.
  • Leading Diesel Generator Brands at Great Prices- the Blue Diamond diesel generator range are exclusively chosen from leading brands like DenyoKubotaPerkinsCummins and more. Featuring well-engineered engines built to run efficiently, quality parts & components and a range of features. All our diesel generators are offered at the best possible price.
  • Expert Diesel Generator Servicing & Support- Blue Diamond Machinery was built on the core value of delivering a better service and quality advice. We are confident in our diesel generator range, which is why we offer 24/7 Australia wide support across all our diesel generator brands. As well as extensive generator servicing and support.
  • Extended Warranties on all Diesel Generators- our diesel generators come with generous warranties for your peace of mind. 

Blue Diamond Machinery supply diesel generators Australia-wide, from Melbourne, Perth locationsto SydneyBrisbane & Adelaide, wherever you are located, we can assist.  Blue Diamond Machinery has generator service agents Australia wide.


At Blue Diamond, we are extremely confident in the quality of the Generators we distribute, which is why we offer 24/7 Australia Wide Support and provide Industry Leading Warranties throughout our entire Diesel Generator range.


It's important to ensure you select the right Diesel Generator for your needs. So, if you have any questions or need some help please do not hesitate to call us on 1300 998 647

What is a Diesel Generator?

A Diesel generator is a functional machine that produces electricity by burning diesel fuel. Understanding how it works is made easy; in the initial stage, air is blown into the generator until compressed; then diesel fuel is injected. The combination generates an intense heat that triggers the inflammation of the fuel. Once this combustion takes place, the generator will start. The generator will produce electrical energy for distribution and, due to its durability and strength, can be used extensively, for hours, days or weeks. To learn more about whether a diesel generator is suited to your power needs, or if you have any questions, speak with our expert team at 1300 998 647.

How Do Diesel Generators Work?

Diesel generators use a series of steps to generate AC (alternating current) electricity. The process starts when a diesel (combustion) engine converts some of the chemical energy in the fuel to rotating mechanical energy. The rotating motor is then used by the AC alternator to generate electricity, while a wire moving through a magnetic field induces electrical charges. Diesel generators can be used for either prime or standby power. For example, a diesel generator might be used for prime power in a remote region with limited grid connection, or for standby or backup power during a blackout. The machines come in single-phase which could suit household or small business use, or three-phase for longer-term or heavy-duty industrial use. If you want to know more, read our article on how diesel generators work.

What Are Diesel Generators Used For?

One of its most common uses today for diesel generators is to provide backup or standby power to facilities and systems in case of power failure. Modern diesel generators are designed to monitor electric current continuously, and they automatically start when there is a power interruption and switch off when utility service comes back online. These generators are found in commercial, industrial, mining and agriculture environments and other organisations that need a power supply that cannot be disrupted. Many construction sites will also use diesel generators to power tools when it's not possible to reach power grids. Although diesel is typically known as the more expensive fuel than petrol, diesel generators are more reliable and durable than petrol generators. To understand more about the applications diesel generators are used for, or if you have any questions, speak with our expert team at 1300 998 647.

What Size Diesel Generator Do I Need?

When considering the purchase of a diesel generator, one of the initial points to establish is the size of the generator required. Large commercial diesel generators are designed for those requiring backup power during outages, remote businesses operating off grid and events requiring significant, continuous power for a defined period. These vast generators can only be moved via crane or forklift and operate on 3-phase power, making them well suited to jobs requiring the delivery of larger power loads. The portable diesel units are the other type of diesel generator and best suited to trade and mining sites. They typically come with steel rollover frames and condenser-style alternators, making them robust and reliable units ideal for an on-site power source where heavy loads are involved. These can be either single phase or 3-phase and are well suited to a wide range of situations and power requirements such as building sites requiring a reliable portable power source, off-grid residential requiring reliable power or backup for solar and use in a workshop powering tools. If you are still unsure which size diesel generator required, speak with our expert sales team at 1300 998 647.

Why Choose a Diesel Generator Over Petrol?

Choosing a Diesel generator is commonly afforded to those seeking a stable power source that can work in even the most challenging environments while maintaining efficient functionality. Finding the suitable diesel generator for your needs first requires the separation of the models into two groups. The first are portable diesel generators, ranging from 5.8KVA - 12KVA. These models are reliable and compact with weatherproof canopies, typically used for on-site electricity or as a backup where a reliable source of power is needed. The second group are the larger stationary diesel generator 10KVA-50KVA and 50KVA-700KVA models; these workhorses are suited for larger loads found in trade or job sites, industrial machinery, commercial or farming. Or as a standby/backup generator for homes or office buildings. They provide either prime power or standby/backup power sources and an estimated run time of 27 hours at 100% load. If unsure which generator is best, the Blue Diamond sales team are ready to provide expert advice and guidance, ensuring you choose the right standby generator to meet your needs.

How Efficient Are Diesel Generators?

Diesel engines use compression heat rather than spark ignition to burn the fuel and have greater thermal efficiency than other types of internal combustion engines. This makes diesel generators very efficient machines, especially for continuous and heavy duty use. As a general rule, diesel generators will use 0.4lt of fuel for each kWh produced, which equates to an efficiency ratio of 25%. The efficiency of any particular diesel generator however will depend on the situation and how it’s used. Diesel generators are generally very long-lasting, as they suffer less wear and tear than petrol-run models.