How to store a diesel powered generator set during off - season?

Nov 28, 2025

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Hey there! As a supplier of diesel powered generator sets, I often get asked about how to store these beasts during the off - season. It's super important to do it right, or you might end up with a generator that won't start when you need it most. So, let's dive into the nitty - gritty of storing your diesel generator set properly.

Pre - Storage Inspection

Before you even think about putting your generator away, you gotta give it a thorough once - over. First things first, check the fuel system. Diesel fuel can go bad over time, especially if it's sitting around for months. Look for any signs of water in the fuel tank. Water can cause all sorts of problems, like corrosion and microbial growth. You can use a water - detecting paste to check for water at the bottom of the tank. If you find water, drain it out immediately.

Next, take a look at the oil. Check the oil level and its condition. If the oil looks dirty or has a milky appearance, it's time for an oil change. Old oil can break down and lose its lubricating properties, which can damage the engine components. Also, inspect the air filter. A clogged air filter can restrict airflow to the engine, leading to poor performance. If it's dirty, clean or replace it.

Cleaning the Generator

A clean generator is a happy generator. Start by removing any dirt, debris, or grime from the exterior of the generator. You can use a soft brush or a cloth to wipe it down. Pay special attention to the cooling fins of the engine. These fins are crucial for dissipating heat, and if they're blocked, the engine can overheat.

For the interior, you can use compressed air to blow out any dust or dirt from hard - to - reach places. But be careful not to damage any sensitive components. If there are any stubborn stains or grease, you can use a mild detergent and a soft cloth to clean them. Just make sure to dry the generator thoroughly afterward to prevent rust.

Fuel Treatment

As I mentioned earlier, diesel fuel can go bad. To prevent this, add a fuel stabilizer to the fuel tank. A fuel stabilizer helps to keep the fuel fresh and prevents oxidation and the formation of gum and varnish. Follow the manufacturer's instructions on how much stabilizer to add based on the size of your fuel tank.

It's also a good idea to run the generator for a few minutes after adding the stabilizer. This will ensure that the treated fuel circulates through the entire fuel system.

Battery Care

The battery is an essential part of the generator. If it's not properly maintained during storage, it can lose its charge and may not be able to start the generator when you need it. First, disconnect the battery cables to prevent any parasitic drain. Then, clean the battery terminals with a wire brush to remove any corrosion.

You can store the battery in a cool, dry place. If possible, use a battery charger or maintainer to keep the battery charged. A battery maintainer will keep the battery at a proper charge level without overcharging it.

Storing the Generator

Now that you've prepped the generator, it's time to find a good place to store it. Choose a dry, well - ventilated area. Avoid storing the generator in a damp or humid place, as this can cause rust and corrosion. A shed or a garage is usually a good option.

If you're storing the generator outside, make sure to cover it with a waterproof cover. But don't completely seal it, as the generator needs some ventilation to prevent moisture buildup.

Regular Checks

Even though the generator is in storage, it's important to check on it regularly. Every few months, start the generator and let it run for at least 15 - 20 minutes. This will help to keep the engine components lubricated and prevent them from seizing up.

Also, check the fuel level, oil level, and battery charge during these checks. If you notice any issues, address them immediately.

Our Generator Sets

At our company, we offer a wide range of diesel powered generator sets, including the 20KW Ricardo Generator Set, 40KW Ricardo Generator Set, and 500KW Ricardo Generator Set. These generators are built to last and are designed to provide reliable power when you need it.

If you're in the market for a new diesel generator set or need some advice on storing your existing one, don't hesitate to reach out. We're here to help you make the right choice and ensure that your generator performs at its best.

20KW Ricardo Generator Set factory40KW Ricardo Generator Set suppliers

Conclusion

Storing a diesel powered generator set during the off - season is not rocket science, but it does require some attention to detail. By following these steps, you can ensure that your generator is in good condition and ready to go when the next season rolls around. Whether you're using it for your home, business, or industrial needs, proper storage will extend the life of your generator and save you money in the long run.

If you have any questions or need more information about our generator sets or storage tips, feel free to contact us. We're always happy to chat and help you out.

References

  • Diesel Generator Maintenance Guide, Manufacturer's Manuals
  • "Generator Storage Best Practices" - Industry Publications