Generator Installers in Connecticut: Standby & Home Battery
Find generator and home battery installers in Connecticut. We've gathered 10 installers from across Connecticut with their phone number, address, hours, and Google rating, so you can compare and reach out for quotes. Listings span Cheshire, Stamford, Old Lyme, Tolland, Milford and New Milford and more, so there's likely an installer near you. The installers below average 4.8 stars on Google. The average Connecticut home uses about 695 kWh a month, or roughly 23 kWh a day, so size the generator or battery to the circuits you actually need during an outage rather than the whole house.
Before you get quotes in Connecticut: size your backup
Connecticut at a glance
- 28.7¢
- per kWh, residential
- $199.66
- average monthly bill
- 695 kWh
- average monthly use
- 14 h
- from a 13.5 kWh battery
#4 most expensive of 51
EIA, 2024 annual avg
EIA, 2024 annual avg
At the state's average load of 0.97 kW; longer on essentials only
10 generator and home battery installers in Connecticut
Spread across Connecticut so there's likely one near you. Enter your ZIP above to sort nearest-first. Details from public Google Business Profiles: verify before hiring.
How to choose a generator or battery installer in Connecticut
Licensed electrician for the transfer switch (NEC 702)
A standby generator or home battery is connected through a transfer switch or backup gateway that must isolate your home from the utility so the system can never backfeed the grid (NEC Article 702 for optional standby systems, Article 706 for stationary batteries). That is licensed electrical work in Connecticut; a dealer that subcontracts it should name the electrician on the quote.
Gas line, pad placement, and the mechanical permit
A natural-gas or propane generator needs a licensed gas fitter to size and run the fuel line, and the unit must sit on a level pad at the clearance the manufacturer and your local code require from windows, doors, and vents because of carbon-monoxide risk. Expect an electrical permit and, in most jurisdictions, a mechanical or gas permit, each with an inspection.
Size to your real outage loads, then compare quotes
Ask every installer for a load list: which circuits get backed up (furnace blower, well pump, fridge, sump pump, central air) and their starting watts. Compare quotes on the same generator kW or battery kWh and kW rating, the transfer-switch type (automatic vs. manual, whole-house vs. managed circuits), the warranty, and who handles the annual service.
What to know before hiring in Connecticut
The largest utilities serving Connecticut homes are Connecticut Light & Power (924,132 residential customers, 28.5¢/kWh), United Illuminating (256,302 residential customers, 34.0¢/kWh) and Town of Wallingford (21,405 residential customers, 15.7¢/kWh). Your utility sets the rate your backup power replaces, and it is also who an installer files interconnection or service paperwork with, so name it when you ask for quotes.
Check the license before you sign
Electrical contractors in Connecticut are licensed by the Connecticut Department of Consumer Protection. E-1 Unlimited Electrical Contractor and E-2 Unlimited Electrical Journeyperson licenses.
Look up a licenseBoard siteLinks checked 2026-10-19
Listing data is sourced from public Google Business Profiles and may be out of date. WattSimple is not affiliated with, and does not endorse or recommend, any listed company. Verify licensing and details directly before hiring.
Bridge the gap before the install
A standby generator or home battery takes weeks from quote to inspection. A portable inverter generator covers the fridge, furnace blower and electronics in the meantime, and stays useful as a backup to the backup. Size it with the generator sizing calculator, and run it outdoors, well away from doors and windows.
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Mid-size inverter (3,000–6,000 W running)
WEN DF680iX
Best for: Furnace blower, fridge and sump pump in an outage, or an RV with one air conditioner
Small inverter (under 3,000 W running)
Honda EU2200i (EU2200ITAN)
Best for: A refrigerator, internet and electronics through an outage, or quiet power at a campsite
Other energy pros in Connecticut
Frequently asked questions
Plan your backup power
Running and starting watts for the circuits you back up.
Home battery sizingkWh and kW for a battery that covers your outages.
Home battery costInstalled price by capacity and brand class.
Connecticut electricity ratesWhat you pay per kWh today in Connecticut.
Standby generator installation costWhat drives the installed price.
Battery backup vs. generatorWhich one fits your outages.
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