What Happens If Power Comes Back On While Generator Is Running?

A power generator is a perfect backup power source in case of power outages. That said, it can be confusing to know what to do if the utility or main power comes back on while your generator is still running. In this article, we will look at the various scenarios, what happens and how to handle them appropriately.

The generator switches off

If the utility or main power comes back on, the generator will sense this, and most models will automatically shut down to avoid the crossover. In such cases, you need to turn off the generator manually as a backup measure to prevent any possible electrical interference. If your generator does not automatically shut down or you are unsure, check the manufacturer’s manual for guidance on how to turn off your generator safely.

The generator continues running

Some generators continue running regardless of whether the main or utility power is back on. The implications of this can cause damage to your electrical system if not handled properly. The two possible scenarios are:

The power frequency increases:

If the utility power comes back on and the frequency is higher than what the generator produces, the generator’s automatic transfer switch (ATS) will break the connection between the generator and your house. Your home will then receive power from the main grid, and your generator will continue running, producing unusable power. This scenario can cause damage to your generator and your electrical system if not handled correctly. If this happens, you need to turn off the generator manually as soon as possible to prevent potential damage.

The power frequency drops:

If the frequency lowers, the ATS will manage the switch, and your home will continue receiving power from the generator. In this case, it is safe to keep the generator running until such a time that the utility power stabilizes. If you are unsure, it is crucial to call a professional electrician to assess the situation and offer appropriate advice.

Danger in running an overloaded generator

Please note that running a generator that is not appropriately sized for your home can lead to the production of unusable power in the scenario mentioned above. An overloaded generator will most likely trip the circuit breaker, which will cause power to shut off temporarily until the issue is resolved by an electrician.

Safety Tips

Regardless of the generator type, here are some safety tips to follow when using a generator for your home:

Never connect your generator to the main grid; instead, use a transfer switch.
Make sure the generator is properly grounded before use.

Place the generator away from windows, doors, or vents to prevent carbon monoxide from getting into your home.
Always refuel your generator when it cools down instead of when it is running.
Avoid overloading the generator as it can cause significant damage and wear to your generator and your electrical system.

Conclusion

Now you know what happens if the power comes back on while your generator is still running. If you face any uncertainties or challenges with your generator, it is always safe to contact a certified technician to help you handle the matter professionally. Remember, safety always comes first!

Further reading: How Far Does A Portable Generator Need To Be From A Building?

FAQs for What Happens If Power Comes Back On While Generator Is Running?

What happens when power is restored while the generator is still running?

If power is restored while the generator is still running, it’s important to turn off the generator right away. The energy from the grid can damage your generator’s electrical systems and can potentially cause an electric shock.

Is it okay to leave the generator running when the power comes back on?

No, it’s not okay to leave the generator running when the power comes back on. Leaving the generator running can create a dangerous situation, especially if power from the grid is fluctuating or experiencing an outage.

What should I do if the power goes out while the generator is running?

If the power goes out while your generator is running, the generator will continue to provide power to your home. You should not turn your generator off unless you’re experienced and comfortable with using a backup power system.

Can the generator be damaged if I turn it off when the power comes back on?

No, turning off the generator when the power comes back on will not damage it. In fact, it’s better to turn off the generator as soon as possible to protect it from any potential damage or electrical hazards.