Are diesel generators expensive to run FOR BUSINESS?

Are you considering a diesel generator and want to know if they are expensive to run? Before purchasing a generator, it is important to consider the running cost to ensure you can afford to use it. While diesel generators are among the most efficient, they still have running costs that can be expensive. Today, we walk you through the running cost of a diesel generator and give you some tips on how to make yours as cost-effective as possible. 

Running costs of a diesel generator

The running costs of a diesel generator vary, depending on the size, efficiency, and the load its powering. You also need to consider the cost of diesel in your location and how often you need to purchase fuel. As a general rule, diesel generators use 0.4 liters of fuel for every kWh produced. This gives you an efficiency ratio of 25% which can be used to work out your fuel consumption and running costs. 

Alongside the cost of fuel, you will have ongoing maintenance costs, like servicing your generator, replacing filters, and carrying out any repairs. You can use generator fuel calculators, like this one to work out the running costs for your diesel generator.  

Cost-effective tips for running a diesel generator 

Below, we have our cost-effective tips that allow you to run a diesel generator without spending a fortune. Not every tip will be relevant to you and your situation, but they will provide you with some inspiration on the best way to run your diesel generator. Our tips are outlined below: 

Use the right size generator for your needs

Using a generator that is larger than your needs will waste fuel and end up costing you more money. When choosing the size of your generator, consider your typical power requirements and pick a generator that can handle the startup loads. We recommend that you add a 10% buffer to ensure that your generator can run all of your appliances at once. 

Optimise your engine load 

When a diesel engine runs overloaded or underloaded, it is less efficient, costing you more in fuel. Try to aim for a load of 50 to 75% of the generator's capacity. Doing so will provide you with optimal fuel consumption. 

Consider the weather 

Extreme temperatures can impact fuel efficiency, so it's best to keep an eye on the weather. Hot summers can leave your generator running less efficiently than usual, so ensure you have proper ventilation and carry out regular radiator maintenance. It can also be worth performing a load bank to test your generator under simulated load during peak heat periods to see how it performs. 

Service it regularly 

For your generator to run efficiently, you will need to carry out regular service and maintenance. This prevents any minor issues becoming serious and prevents your generator from running efficiently. As part of your generator maintenance it will need regular oil changes, filter replacements, and air intake cleaning. 

Alongside servicing your generator, you will need to clean it regularly. Dirty air filters can restrict airflow, which reduces engine performance and increases fuel consumption. You should regularly clean the air filter and other components to keep your generator running smoothly. Your instruction manual will provide cleaning instructions that should be followed. 

Care for your battery 

Weak batteries can cause hard starts, which adds extra pressure to your engine. You can notice an increase in fuel use, reducing the efficiency of your generator. Keeping your battery in good condition and replacing it when necessary will help to keep your generator running as efficiently as possible. 

Store your generator correctly 

When you are not using your generator, it should be stored in a dry, cool, and well-ventilated area. Doing so helps to prevent corrosion, allowing it to last for longer. Storing your generator in a secure location allows you to start using it as soon as you need to, without worrying about drying it or carrying out any additional maintenance. 

Avoid overloading 

You should avoid overloading your generator, as it can cause it to be less efficient. Overloading your generator involves using it to power more appliances than it can handle, which can leave you with expensive repairs or even cause your generator to break down. 

Use quality fuel 

To keep your generator running efficiently for as long as possible, invest in clean, untreated diesel fuel. This will protect your engine from wear and tear and help it run more efficiently. Using contaminated fuel can clog injectors, reducing the efficiency of your generator and shortening its lifespan. 

Find your generator today 

Running a diesel generator can be expensive, but by using our tips, you can keep the cost down and enjoy a cost-effective generator. Alongside the running costs, you want to consider the cost of purchasing or hiring a diesel generator. Renteca offer reasonable prices for their generators, allowing you to enjoy the generator you need without a hefty price tag. Use Renteca to see the prices of different generators and find the right option for you.