When the power goes out or when you're working off-grid, a diesel generator can be your best friend. Known for their durability, fuel efficiency, and high power output, diesel generators are a reliable choice for homes, businesses, and industrial sites. But with so many options available, how do you choose the right one?
In this guide, we’ll walk you through the key factors to consider when choosing a diesel generator, so you can confidently pick the model that suits your needs and budget.
Why Choose a Diesel Generator?
Before diving into the buying tips, it’s worth understanding why diesel generators are so popular:
- Fuel efficiency: Diesel burns slower than petrol, meaning you get more power for your money.
- Longer lifespan: Diesel engines are built tough and tend to outlast other types of generators with proper care.
- Reliable performance: Diesel generators are great for both backup and continuous power, even in remote locations.
- Low maintenance: While regular servicing is still needed, diesel engines require less frequent maintenance than petrol engines.
Whether you need standby power during outages or a primary source of electricity for a job site, diesel generators are up to the task.
1. Determine Your Power Requirements
The first and most important step is to work out how much power you actually need. Make a list of the devices, appliances, or systems you want to run on the generator.
- For home use: Think about essentials like fridges, lights, internet modems, and air conditioning.
- For business or industrial use: Include machinery, computer systems, tools, pumps, and any equipment essential to operations.
Tip: Check the wattage of each item and add up the total. Then add a little buffer (around 20%) to ensure your generator can handle power surges or additional equipment.
2. Decide Between Standby or Portable Generators
Diesel generators come in different formats depending on how you plan to use them:
- Standby diesel generators: Installed permanently, they start automatically during a power outage. Ideal for homes, offices, and facilities that need continuous protection.
- Portable diesel generators: Great for construction sites, events, and mobile operations where temporary or mobile power is needed.
Consider: Do you need continuous backup at home? Or are you moving from site to site with your power needs? Your answer will guide which type suits you best.
3. Consider Single-Phase vs Three-Phase Power
Your choice will also depend on the electrical setup of your property or equipment:
- Single-phase generators are typically used in residential and small commercial setups.
- Three-phase generators are better suited for industrial and large commercial sites with higher energy demands.
Check with your electrician or power provider if you’re unsure which one applies to you.
4. Choose the Right Fuel Tank Size
Diesel generators come with different fuel tank capacities, which impact how long they can run without needing to be refuelled.
- Smaller tanks: Suitable for short-term or occasional use.
- Larger tanks: Better for continuous operation or areas where refuelling may not be convenient.
Tip: If you’re running a generator for long hours (such as at a farm or remote work site), opt for a larger tank or consider a generator with external fuel tank compatibility.
5. Check Noise Levels
Some diesel generators can be quite noisy—but not all. If you're in a residential area or noise-sensitive environment, look for generators with:
- Low dB ratings (especially under 75 dB)
- Soundproof enclosures or acoustic insulation
Many modern models are designed to operate more quietly without compromising performance.
6. Look at Starting Mechanisms
Diesel generators can be started in a few different ways:
- Manual start: Basic and cost-effective, but requires physical effort.
- Electric start: Push-button convenience, ideal for residential or commercial use.
- Automatic start (ATS-compatible): Perfect for standby power needs—automatically turns on during a power outage.
If convenience and speed matter to you, an electric or automatic start is worth the investment.
7. Think About Location and Installation
Where your generator will be located is an important factor:
- Outdoor units should be weatherproof and properly ventilated.
- Indoor units need to meet ventilation, exhaust, and fuel storage requirements.
Also consider physical space, proximity to your main switchboard, and ease of access for servicing.
8. Check for Safety and Compliance Features
Make sure the generator complies with Australian standards and has built-in safety features like:
- Low oil shut-off
- Overload protection
- Emergency stop buttons
- Circuit breakers
Safety is especially important for high-use or high-capacity generators.
9. Set a Realistic Budget
Diesel generators range widely in price depending on size, features, and brand. While it might be tempting to choose the cheapest option, investing in a quality, well-sized generator will save you more in the long run through fuel efficiency and durability.
Factor in costs like delivery, installation, accessories (such as an ATS), and ongoing maintenance.
10. Choose a Trusted Supplier
Buy from a reputable supplier that offers expert advice, proper installation, after-sales support, and access to spare parts and servicing. At Jubilee Energy, we help you choose the right diesel generator based on your actual usage, not just specs on paper.
Find the Right Diesel Generator with Jubilee Energy
Choosing the right diesel generator doesn’t have to be complicated. With the right guidance and a clear understanding of your power needs, you can find a generator that gives you peace of mind, performance, and long-term value.
Looking for a reliable diesel generator in Brisbane or across Australia? Jubilee Energy is here to help.
Contact Jubilee Energy today to get expert advice, top-quality generators, and tailored energy solutions for your home, business, or worksite.
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