Backup Generator Installation in Centennial, CO
Hazards, utility rules, permits and installers
A standby generator runs as long as it has fuel. See what to check in Centennial, from utility transfer-switch rules to permits and fuel, then get quotes.
Centennial backup generator at a glance
Utility rules and programs for Centennial
Xcel Energy and CORE Electric serve Arapahoe County, so which rules apply depends on your address.
| Utility | Type | Generator rules |
|---|---|---|
| Public Service Co of Colorado | investor-owned | A generator transfer switch is electrical work: use a licensed electrician and pull any permit your city or county requires. Mesa County, for example, requires a separate permit for generators, and CORE has a Standby Power Connection Procedure for backup generators and batteries. |
| CORE Electric Cooperative | member-owned cooperative | A generator transfer switch is electrical work: use a licensed electrician and pull any permit your city or county requires. Mesa County, for example, requires a separate permit for generators, and CORE has a Standby Power Connection Procedure for backup generators and batteries. |
Program details are from each utility’s own pages (read October 2026). See the Colorado incentives table for statewide credits and a status for every program.
What to plan for in Centennial
- Hail (very high): Hail is hard on rooftop solar; ask installers about impact-rated panels and your insurer about coverage.
- 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.
Permits and approvals in Centennial
- City of Centennial Building Division: permit information · 303-325-8000
- Centennial publishes a photovoltaic solar installation submittal checklist, and permits are applied for online. The checklist notes that the city permit does not replace homeowner association review.
- Check any contractor on the Colorado State Electrical Board (license verification) before you sign.
Fees and steps change; confirm with the office before you start. We have not verified timelines for Centennial.
Costs and savings
We do not have verified installed prices for Centennial alone. The Colorado 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 Colorado State Electrical Board (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 Centennial
Tell us about your project in Centennial. 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.
More for Centennial
Solar Panel Installation in Centennial · Home Battery Installation in Centennial · Home EV Charger Installation in Centennial · Centennial energy guide · Colorado energy guide.
Backup Generator Installation in Centennial 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 Centennial?
Usually yes, and the utility may need to approve solar and batteries. City of Centennial Building Division handles permits in Centennial; see the permit information above.
How do I find a licensed installer in Centennial?
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 Colorado State Electrical Board (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 Colorado Division of Property Taxation; 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.