Power cut? Remote job? Tools that refuse to run on good intentions alone? Our diesel generators offer reliable power for worksites, homes and off-grid setups. Explore our range of generators australia and compare sizes, outputs and features to find the right fit without the guesswork.
What Size Diesel Generator Do You Need?
Generator size comes down to your total running load, plus enough headroom for appliances and tools with higher start-up demands. Add up what you plan to run at the same time, then choose a generator with capacity to spare.
Small Diesel Generators, 5 To 8 kVA
Small diesel generators in the 5 to 8 kVA range are a practical choice for tools, pumps, essential household appliances and smaller backup setups.
Many portable diesel generators also fall within this range, giving you reliable power without stepping up to a larger stationary set.

Bigger Sets, 8 kVA And Up
Need to run heavier equipment, multiple appliances or larger site loads? Diesel-powered generators above 8 kVA provide extra capacity for more demanding applications.
Remember to account for start-up loads from equipment such as pumps, compressors and air conditioners when comparing sizes.

Diesel Or Petrol?
Diesel generators generally suit frequent use, longer run times and heavier loads. They tend to be fuel-efficient and are built with durability in mind.
Petrol generators can be lighter and less expensive upfront, making them a practical option for occasional use or smaller portable setups.
What Diesel Generators Cost
Diesel generator prices vary considerably depending on output, engine, alternator, starting system and overall build quality.
When comparing diesel generators for sale, consider more than the purchase price. Fuel use, servicing, spare parts availability and expected run time can all affect long-term value.
The Best Diesel Generators For Your Setup
The best diesel generators aren’t necessarily the biggest. The right option is one that comfortably handles your required load and suits where and how you plan to use it.
Quiet Sites And Suburbs
Working near homes, offices or other noise-sensitive areas? Look for enclosed or silenced diesel electric generators designed to reduce operating noise.
Always check the stated noise level before choosing, particularly if the generator will run for extended periods.
Home Backup And Caravans
For home backup, calculate the essentials you want to keep running during an outage, then allow room for start-up demand. A licensed electrician should handle any connection to your home electrical system.
For caravans and mobile setups, consider size and weight as well as output. Smaller portable options are usually easier to transport, but make sure they can comfortably power your intended appliances.
FAQs
People often ask us these questions when talking about diesel generators.
Which is the best diesel generator?
The one correctly sized for your load, with reliable local parts, servicing and warranty support.
What size diesel generator would you need to run a house?
Around 5-8 kVA may cover essentials, while larger household loads can require 8-15+ kVA.
What are the disadvantages of diesel generators?
Higher upfront cost, extra weight, engine noise and regular servicing.
What is the 20/20 rule for generators?
A common rule of thumb is to run it for 20 minutes every 20 days at around 20% load.