Skip to content
Portable generator safely stored outdoors with protective frame and clean setup

How Do I Store a Generator Long-Term?

Generators aren’t like socks—you can’t just shove them in the shed and forget about them. To store a generator long-term, you’ll need to clean it, deal with the fuel, and find it a safe home. That’s the short answer. The longer one? Well, a few smart steps now could save you from expensive repairs and a cranky generator that won’t start when you need it most.

Portable generator neatly stored in a dry garage corner

Preparing Your Generator for Extended Storage: Fuel and Engine Essentials

Store Generator With or Without Gas: Making the Right Fuel Decision

One of the biggest questions people have is whether to leave fuel inside. Here’s the truth: petrol doesn’t age gracefully. Leave it sitting and it breaks down, gumming up the carburettor and leaving your generator struggling to turn over.

The Risks of Untreated Fuel in Your Generator During Long-Term Storage

Old fuel isn’t just smelly—it can go off in as little as a month. The result? Sticky residue in your fuel lines, rust in the tank, and an engine that coughs, splutters, or flat-out refuses to run.

Best Practices for Draining or Stabilising Fuel in Your Generator

You’ve got two safe options. If you’re parking the generator for a long stretch, drain the tank completely. If you think you’ll use it within a year, add a fuel stabiliser instead. Just remember to run the engine for a few minutes so the treated fuel works through the system.

Store Generator With or Without Oil: Engine Lubrication for Long-Term Health

Oil is your generator’s shield against wear and tear, but leaving dirty oil inside is a bad idea.

Changing the Oil in Your Generator Before Storage

Before you tuck it away, swap out the old oil and replace the filter. Fresh oil protects moving parts and avoids the sludgy mess that builds up over time. Skip this, and you might end up with sticky valves or even a seized engine.

The Importance of Engine Fogging for Internal Rust Prevention in Your Generator

If your generator is going to sit idle for a year or more, consider fogging the engine. A quick spray inside creates a protective coating that stops rust from forming on delicate parts. It’s like giving your generator a raincoat for the inside.

Battery Disconnection and Maintenance for Your Stored Generator

Some generators rely on a battery to start, and that little detail is often forgotten.

Preventing Battery Drain in Your Generator During Downtime

Disconnecting the battery before storage stops it from slowly draining. Without this, you’ll likely come back to a dead battery just when you need power the most.

Periodic Charging and Storage Tips for Your Generator's Battery

Batteries like attention. Hook it up to a trickle charger or give it a boost every few months. Store it in a cool, dry place and it’ll reward you with a longer life.

Man disconnecting generator battery for safe long-term storage

Choosing the Right Location: How Do I Store a Generator Long Term Indoors?

Can You Store a Generator in the Garage? Safe Indoor Placement

You can definitely store your generator in the garage—just never run it there. Storage and operation are two different things.

Ventilation Requirements for a Generator in Garage Storage

A garage with good airflow is perfect. Ventilation reduces moisture, keeping rust and corrosion at bay.

Fire Safety and Carbon Monoxide Risks for Indoor Generator Storage

While storage itself is safe, remember generators produce deadly carbon monoxide when running. Keep it turned off indoors and store it well away from fuel cans or other flammable materials.

Generator Storage Ideas: Beyond the Garage

No garage space? Don’t worry—there are other options.

Utilising a Dedicated Generator Storage Box or Shed for Enhanced Protection

A storage box or small shed built for generators does the job nicely. Many are weatherproof and offer ventilation, protecting your machine from dust, pests, and damp.

Environmental Control: Protecting Your Generator from Humidity and Temperature Extremes

Wherever it’s stored, think about the climate. Damp conditions call for a dehumidifier or moisture absorbers, while extreme heat can shorten the lifespan of parts. Keeping conditions steady helps prevent damage before it starts.

Fuel being drained from a generator into a container outdoors

Practical Considerations for Long-Term Generator Storage: Community and Alternatives

How Do I Store a Generator Long Term Without a Dedicated Structure? Alternative Methods

Not everyone has the luxury of a shed or garage.

Using High-Quality Generator Covers for Basic Protection

A breathable, heavy-duty cover offers decent protection against dust and pests. Avoid tarps—they trap condensation, creating a rust factory underneath.

Simple Steps for Preparing Your Generator When Lacking Ideal Storage Facilities

If the only option is outdoors, elevate it off the ground, cover it properly, and check it regularly. These small steps go a long way in keeping it running smoothly.

How Do I Store a Generator Long Term Reddit: Real-World Advice and Debates

Reddit and similar forums are full of people swapping generator tips and arguing about the best methods.

Common Questions and Shared Experiences on Generator Storage Forums

The hot debates are usually the same—drain the fuel or stabilise it, garage or shed, how often should you run it? What you’ll find is that there’s no single right answer, but preparation always wins over neglect.

Insights from the Community on Fuel, Oil, and Battery Best Practices for Your Generator

Many users swear by fuel stabilisers and swear at anyone who doesn’t change their oil before storage. Others insist a regular run is the secret. The takeaway? Do what makes sense for your usage, but don’t skip the basics.

Periodic Maintenance and Checks for Your Stored Generator

Even tucked away, your generator isn’t a set-and-forget machine.

The Importance of Occasional Run-Times for Your Stored Generator's Longevity

Every few months, fire it up for 20–30 minutes. This keeps everything lubricated and reminds you that it’s still in working order.

Inspecting Your Generator for Issues Before and After Extended Storage

Look for leaks, chewed wires, or corrosion before and after storage. A five-minute check saves you from a nasty surprise during a blackout.


Conclusion: A Well-Prepared Generator Ensures Reliable Power When You Need It Most

Storing a generator properly isn’t complicated, but it does take a little effort. Fresh oil, treated fuel, safe storage, and the odd check-up will keep it in fighting shape. Do this, and your generator won’t just sit idle—it’ll be ready to roar into action the moment the lights go out.

You may also like:

Timothy Jagger profile picture

Timothy Jagger

Learn More

About the author:
“What I love most about getting outdoors is switching off and hitting reset. I used to spend my weekends legging it out from under a roof—now I help others do the same.”

Previous article Do I Need a Permit to Install a Standby Generator?
Next article Where to Put a Generator in a Storm?