Backup Generator Installation in Marietta, GA
Hazards, utility rules, permits and installers
A standby generator runs as long as it has fuel. See what to check in Marietta, from utility transfer-switch rules to permits and fuel, then get quotes.
Marietta backup generator at a glance
Utility rules and programs for Marietta
Marietta Power, Georgia Power and Cobb Electric Membership serve Cobb County, so which rules apply depends on your address.
| Utility | Type | Generator rules |
|---|---|---|
| City of Marietta | city-owned | Georgia Power requires a break-before-make, mechanically interlocked transfer switch for a battery that powers your home in an outage, and the state’s electrical code is the 2023 National Electrical Code with Georgia amendments; ask your city or county about a permit. |
| Georgia Power Co | investor-owned | Georgia Power requires a break-before-make, mechanically interlocked transfer switch for a battery that powers your home in an outage, and the state’s electrical code is the 2023 National Electrical Code with Georgia amendments; ask your city or county about a permit. |
| Cobb Electric Membership Corp | member-owned cooperative | Georgia Power requires a break-before-make, mechanically interlocked transfer switch for a battery that powers your home in an outage, and the state’s electrical code is the 2023 National Electrical Code with Georgia amendments; ask your city or county about a permit. |
Program details are from each utility’s own pages (read October 2026). See the Georgia incentives table for statewide credits and a status for every program.
What to plan for in Marietta
- Lightning (very high): Lightning causes short outages and damages electronics. Surge protection and a battery that switches over automatically protect the things you care about.
- Tornadoes (relatively high): Tornado-season storms cut power quickly. A battery that switches on by itself, or a portable generator ready to go, covers the first night; sirens and weather radios need power too.
- Hail (relatively high): Hail is hard on rooftop solar; ask installers about impact-rated panels and your insurer about coverage.
Permits and approvals in Marietta
- Building Department, City of Marietta: permit information
- The page lists permit applications and requirements; check it before you start.
- Check any contractor on the Georgia Secretary of State license verification before you sign.
Fees and steps change; confirm with the office before you start. We have not verified timelines for Marietta.
Costs and savings
We do not have verified installed prices for Marietta alone. The Georgia figures above show what to expect; real quotes depend on your home, equipment and installer. Try the generator sizing calculator, and get at least two written quotes.
Choosing an installer
- License: check the contractor on the Georgia Secretary of State license verification and that the license covers this work.
- Quote: ask for an itemized written quote that names the equipment, warranties and who pulls the permit and handles the utility approval.
- Compare: get two or three quotes and compare them line by line, not only the total.
Get backup generator quotes in Marietta
Tell us about your project in Marietta. We reply ourselves and match you with a licensed installer who serves your area. It is free, with no obligation, and nothing is shared with an installer unless you choose one.
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Backup Generator Installation in Marietta FAQs
What size generator do I need?
It depends on whether you run central air conditioning or only essentials. Use the generator sizing calculator, then have a licensed electrician confirm.
Natural gas or propane?
Natural gas needs a gas line at the home; propane needs a tank, which may need its own permit. Ask your installer and the permit office.
Do I need a permit for a standby generator in Marietta?
Usually yes, and the utility may need to approve solar and batteries. Building Department, City of Marietta handles permits in Marietta; see the permit information above.
How do I find a licensed installer in Marietta?
Use the quote button on this page. We reply ourselves and match you with a licensed installer who serves your area; you can check any contractor on the Georgia Secretary of State license verification.
Sources: sunshine and climate NASA POWER; hazards FEMA National Risk Index; utility numbers EIA-861 (2024); prices EnergySage (October 2026) and Generac (U.S.); credits IRS and the Georgia Department of Revenue; permit information from the city or town’s own page; utility programs from each utility’s own pages (October 2026). General information, not financial, tax, legal or electrical advice. See our editorial policy.