⚡ 699
Standby Generator InstallerSizes, permits and installs whole-home standby generators with an automatic transfer switch.
// 3,624 generator pros · 2,338 cities · 51 states
Find the people who keep your lights on.
A US directory of standby generator installers, repair shops, dealers and rental yards, with free sizing calculators and plain-English guides to backup power. No lead forms, no sign-up.
699Standby Generator Installer
566Generator Repair & Service
364Electrical Contractor
1,890Generator Dealer
105Generator Rental
// What you will find
Five kinds of generator business
🔧 566
Generator Repair & ServiceServices, tunes and repairs portable and standby generators, including warranty work.
🔌 364
Electrical ContractorLicensed electrical work: transfer switches, interlocks, panel upgrades and generator hookups.
🏷️ 1,890
Generator DealerSells generators and power equipment, usually with parts, accessories and setup help.
📦 105
Generator RentalRents portable and towable generators by the day, week or job.
// Free, no sign-up
All calculatorsWork out what you need before you call anyone
⚡ Sizing
Generator Sizing CalculatorPick the appliances you need during an outage and get the running watts, the largest starting surge and the generator size that covers both.
⛽ Runtime & fuel
Runtime & Fuel Cost CalculatorEstimate hours per tank, gallons per hour and what a three-day outage costs on gasoline, propane, diesel or natural gas.
🔀 Transfer switch
Transfer Switch PlannerChoose the circuits you want backed up and see the switch type, circuit count and inlet amperage to ask an electrician for.
🔌 Cord gauge
Extension Cord Gauge CalculatorFind the wire gauge a generator cord run actually needs, based on load, distance and acceptable voltage drop.
🔋 Battery sizing
Battery Backup & Solar SizingConvert your load list into watt-hours, size a battery power station and see how long solar takes to refill it.
✅ Readiness
Outage Readiness ChecklistA 30-point interactive checklist covering equipment, fuel, water, medical needs and the day-three failures. Progress saves in your browser.
// Directory
Open the mapBrowse by state
Alabama69Alaska9Arizona38Arkansas41California231Colorado59Connecticut86Delaware9District of Columbia1Florida311Georgia103Hawaii11Idaho21Illinois116Indiana95Iowa34Kansas24Kentucky41Louisiana110Maine39Maryland49Massachusetts105Michigan104Minnesota48Mississippi30Missouri58Montana16Nebraska15Nevada24New Hampshire38New Jersey84New Mexico22New York230North Carolina129North Dakota16Ohio162Oklahoma59Oregon48Pennsylvania137Rhode Island15South Carolina72South Dakota8Tennessee65Texas316Utah39Vermont12Virginia84Washington66West Virginia24Wisconsin94Wyoming7
Busiest metros
// Guides
All guidesBackup power, explained without the sales pitch
The Power Outage Checklist: What to Do Before, During and After
A practical outage plan covering water, food safety, heat, medical devices and the mistakes people make on day three.
Solar Generators and Home Battery Backup, Explained in Watt-Hours
What a battery power station can and cannot do, how to convert your appliance list into watt-hours, and how long solar really takes to refill one.
Quiet Generators: What the Decibel Rating on the Box Actually Means
Why 52 dB and 76 dB are further apart than they look, how measurement distance changes the number, and what campgrounds and HOAs enforce.
Well Pumps, Furnaces and Sump Pumps: The Loads That Break Generators
Why the three appliances you most need during an outage are also the three hardest to start, and what to do about it.
What a Standby Generator Really Costs to Install
A line-by-line breakdown of where the money goes, why quotes vary so much, and the eight questions that make bids comparable.
The Generator Maintenance Schedule That Prevents the 3 a.m. No-Start
Monthly, seasonal and annual tasks for portable and standby units, plus the storage routine that stops carburettors gumming up.
// Start here
New to backup power?
Backup Power 101 walks through the four categories of equipment, the sizing arithmetic, how power legally gets into your house, and the safety rules that are not negotiable. It links out to the deeper guides as you go.
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