Natural gas or propane: which is better for a standby generator?

Natural gas: the simplest choice if you have it

Many homes in metro Atlanta already have a natural gas line. If yours does, we connect the generator to it. There's no tank to fill and nothing to schedule. As long as gas is flowing to your home, the generator can keep running.

Sometimes the gas meter or line needs to be upgraded to handle the generator along with your other gas appliances. James checks this on the site visit, so there are no surprises.

Propane: backup power for any home

Many homes, especially on larger lots outside the city, don't have natural gas. Propane gives your generator its own fuel supply right on your property. We find a spot for the tank that meets code, connect it to the generator and test everything together.

How long a tank lasts depends on the tank size, the generator size and how much of your home is running. We size the tank with you based on how long you'd like to go between fills.

Is there a difference in power?

Sometimes, a small one. Generac rates most of its home standby generators a little higher on propane than on natural gas. For example, its 22 kW model is rated 22 kW on propane and 21 kW on natural gas. You can see both numbers for each size on our size guide. James accounts for your fuel type when he sizes your generator.

Which should you choose?

• You have natural gas: natural gas is usually the easy answer.
• You don't have natural gas: propane is a great option. Learn about propane tank installation.
• You're not sure: we'll check on the free site visit.