Diesel Generators for Sale

Reliable Diesel Generators for Commercial and Backup Power

If you need power you can count on, diesel is the answer.

Diesel generators are the preferred choice for commercial and industrial applications across Australia. They handle heavy loads, run for extended periods, and deliver consistent output when it matters most.

At Southern Generators and Electrical we supply diesel generator systems from compact units through to large scale industrial setups. Whether you need backup power for a commercial building, a reliable source for a construction site, or a solution for remote and off grid operations, we have a system to suit.

Not sure where to start? Our team will help you find the right generator based on your load requirements, application and site conditions. No jargon, just straight advice.

Getting the size right is the most important decision you will make.

Too small and your generator struggles under load. Too large and you are paying for capacity you will never use. Generator output is measured in kVA and choosing the right range makes everything else straightforward.

We have put together size categories to make this easier. Each one covers the typical applications, load types and industries that size is suited to.

Browse by kVA range below and find the right starting point for your requirements. If you are still unsure, our team can run a load assessment and give you a clear recommendation.

• Small Generators — 5 to 25 kVA Light commercial use, small site power and essential backup systems.
• Light Commercial — 30 to 100 kVA Workshops, site compounds and growing business power needs.
• Large Commercial — 100 to 250 kVA Commercial buildings, agricultural operations and larger site environments.
• Heavy Commercial — 250 to 400 kVA Demanding applications with higher continuous load requirements.
• Heavy Industrial — 400 to 700 kVA High capacity systems for industrial facilities, infrastructure and critical operations.

Common Diesel Generator Applications

Diesel generators are used across a wide range of commercial and industrial environments where reliable power is essential.

They are commonly selected for:

• Construction sites where consistent power is needed for tools, equipment and site offices
• Commercial buildings requiring backup power to maintain operations during outages
• Industrial facilities with machinery, motor loads and continuous power demand
• Agricultural operations including irrigation systems, processing equipment and remote infrastructure
• Remote or off grid locations where mains power is not available
• Emergency and standby systems for critical infrastructure and essential services

Because diesel generators are built for durability and long run times, they are well suited to applications where performance and reliability cannot be compromised.