When the power goes out—whether it’s because of a storm, utility outage, or unexpected grid failure—a backup generator can be a lifesaver. From keeping the lights on and the refrigerator running to powering critical medical equipment, generators provide peace of mind when you need it most.

But with that peace of mind comes responsibility. Generators, whether portable or standby, require regular maintenance and safe operation practices to keep them reliable and prevent dangerous situations like fires, carbon monoxide poisoning, or equipment damage.

In this guide, we’ll cover essential generator safety tips, maintenance best practices, and common mistakes to avoid so your backup power is always ready when you need it.

Why Generator Safety Matters

Generators are essentially engines that produce electricity. Like any powerful machine, they carry risks if used improperly. According to the Consumer Product Safety Commission (CPSC), dozens of people die each year from carbon monoxide poisoning caused by improper generator use. Fires, electrical shocks, and fuel hazards also pose threats.

The good news? Almost all of these dangers can be prevented with proper setup, operation, and maintenance.

Generator Safety Tips

1. Never Run a Generator Indoors

Generators produce carbon monoxide (CO), an odorless and deadly gas. Always operate your generator outside, at least 20 feet away from your home, garage, or windows. Never use them inside basements, crawlspaces, or enclosed patios.

2. Use the Right Extension Cords and Transfer Switches

If you’re using a portable generator, only connect appliances using heavy-duty extension cords rated for outdoor use. Avoid daisy-chaining cords together.
For whole-home power, have a licensed electrician install a transfer switch. This prevents dangerous backfeeding, which can electrocute utility workers or damage your home’s electrical system.

3. Store Fuel Safely

Gasoline and diesel are flammable and degrade over time. Store fuel in approved containers, in a cool, ventilated area—never in your home. Add fuel stabilizer if you plan to keep it longer than a few months. Always shut the generator off and let it cool before refueling.

4. Keep Your Generator Dry

Water and electricity don’t mix. Don’t run your generator in the rain unless it’s covered by a manufacturer-approved enclosure or tent. Makeshift tarps can trap fumes or overheat the machine.

5. Install Carbon Monoxide Detectors

Even when following best practices, accidents happen. Protect your family by installing CO detectors on every floor of your home and testing them regularly.

Generator Maintenance Tips

Like your car, a generator needs regular maintenance to perform reliably. Neglecting upkeep can lead to hard starts, engine damage, or complete failure when you need it most.

1. Run Your Generator Regularly

Engines don’t like sitting idle for months at a time. Run your generator for 15–20 minutes every month to keep the engine lubricated and ensure it will start when you need it.

2. Change the Oil

Check your generator’s oil levels before every use. For most models, you’ll need to change the oil after the first 20–30 hours of use, then every 50–100 hours after that (or as recommended by the manufacturer).

3. Inspect the Air Filter

Dust and debris can clog your generator’s air filter, reducing efficiency and causing engine wear. Clean or replace the filter as part of your routine maintenance.

4. Check Spark Plugs

Worn spark plugs can make your generator hard to start. Inspect them annually and replace them if fouled or damaged.

5. Test the Battery (Standby Generators)

If you have a whole-home standby generator, check the battery regularly. A weak battery is one of the most common causes of startup failure.

6. Use Fresh Fuel

Old fuel is one of the top reasons portable generators fail. Drain unused fuel after each season, or use a stabilizer to keep it fresh for longer storage periods.

7. Follow the Manufacturer’s Service Schedule

Every generator is different. Review your manual for specific service intervals and recommended parts. Keeping a logbook of maintenance can help ensure you stay on track.

Common Generator Mistakes to Avoid

• Backfeeding through a wall outlet – Extremely dangerous and illegal in many areas.

• Overloading the generator – Running too many appliances can damage the unit and trip breakers.

• Ignoring warning signs – Strange noises, smoke, or surging power are red flags that should be addressed immediately.

• Improper storage – Leaving a generator exposed to the elements leads to rust, corrosion, and engine failure.

When to Call a Professional

While basic maintenance can be done by most homeowners, some tasks are best left to licensed electricians or generator service providers. Call a professional if:

• You need a transfer switch installed.

• Your generator fails to start despite routine care.

• You notice unusual smells, leaks, or electrical issues.

• You want an annual inspection to ensure reliability.

Final Thoughts

A generator is an investment in your comfort, safety, and peace of mind. But it’s only as reliable as the care you give it. By following safety precautions, performing regular maintenance, and avoiding common mistakes, you’ll ensure your generator is ready to deliver power when you need it most.

If you’re unsure about the condition of your generator or want expert help with installation, inspections, or repairs, don’t hesitate to reach out to a licensed electrician. Proper upkeep today could mean the difference between lights on—or sitting in the dark—during the next outage.