Generac Standby Generators
When the Grid Goes Down, Your Home Stays On
A Generac home standby generator turns itself on within seconds of an outage. No cords. No gas cans. No waiting in the dark. Professionally installed and serviced by CellSun.
- Authorized Generac Residential Dealer
- Factory-direct equipment and warranty support
- Licensed and insured in Connecticut
- Installed, permitted, and serviced by CellSun
The Real Cost of an Outage
What Does a Three-Day Outage Actually Cost You?
Connecticut homeowners already know the answer. Nor'easters, ice storms, and summer thunderstorms take the grid down every year. Most people find out how unprepared they are at 2 a.m., in the dark, with a freezer full of food and a sump pump that stopped running.
A basement that floods
Your sump pump is electric. When the power stops, the water does not.
A freezer full of spoiled food
Most refrigerators lose their contents after 24 to 48 hours without power.
Frozen and burst pipes
In a Connecticut January, a house without heat becomes a plumbing repair bill fast.
A home you have to leave
Hotel bills, disrupted work, medical equipment that stops running. The costs add up quietly.
A generator is not a luxury purchase. It is the difference between an inconvenience and a claim.
How It Works
Automatic Power in Seconds. You Do Not Have to Be Home.
A Generac home standby generator installs outside your home like a central air unit and runs on natural gas or liquid propane, whichever your property already has.
The utility power drops
A storm, a downed line, an equipment failure. Your home goes dark.
The transfer switch detects it
The automatic transfer switch senses the loss and signals the generator to start. This happens whether you are home, asleep, or away on vacation.
The generator takes over
Power is restored to your home in seconds. Heat, lights, sump pump, refrigerator, well pump, and medical equipment keep running.
It hands the load back automatically
When utility power returns, the transfer switch shifts your home back to the grid and shuts the generator down. No action required from you.
Why Generac
The Brand Most Homeowners Already Chose
Generac is the market leader in home standby power in North America, with over 60 years of manufacturing behind it.
The #1 home standby brand in North America
8 in 10 homeowners with backup power chose Generac.
24/7/365 support
Outages do not keep business hours. Generac and its dealer network are reachable around the clock.
Mobile Link remote monitoring
See your generator's status from your phone. Get alerts if it needs attention, before you need it to run.
Runs on fuel you already have
Natural gas or liquid propane. No gas cans to fill, no fuel to store, no trips to the station during a storm.
Weekly self-test
The unit runs a brief self-test on a schedule you set, so a failure gets caught before an outage, not during one.
Backed by a nationwide service network
Over 10,000 authorized Generac dealers across the country support and service these units.
Authorized Dealer
CellSun Is an Authorized Generac Residential Dealer
That designation is not a sticker. It changes what you get.
Factory-direct equipment
We buy our Generac units direct from the factory, not through a middleman distributor. You get current-production equipment, not whatever was sitting in a warehouse.
Factory-backed warranty support
Warranty claims run through the authorized dealer channel. When something needs attention, we are the ones Generac talks to. You are not stuck between two companies pointing at each other.
Factory-trained on the equipment we sell
Authorized dealers are trained by Generac on installation, commissioning, and service. The person diagnosing your unit in year six was trained on it in year one.
Sales and service under one roof
We are enrolled for both. We sell it, we install it, and we service it. There is no handoff to a stranger after the check clears.
Listed on Generac's own dealer network
Generac maintains a network of over 10,000 authorized dealers nationwide. We are the one local to Central Connecticut.
Why CellSun
Anyone Can Sell You a Generator. Fewer Can Install It Right.
Generac makes the machine. The install determines whether it works when you need it.
We are an Authorized Generac Residential Dealer
Not a contractor who orders a unit off a distributor shelf. Factory-direct equipment, factory-trained installation, and factory-backed warranty support.
We already own your electrical panel
CellSun does solar, batteries, heat pumps, and EV chargers. A generator is one more load on the same panel. We size the whole system, not just the box outside.
Permits, inspections, and gas connections handled
Generator installs in Connecticut involve electrical permits, gas line work, and a town inspection. We manage all of it. You sign one contract.
Correct sizing, not upselling
An oversized generator wastes money. An undersized one fails when it matters. We load-calculate your actual home instead of guessing off square footage.
You own it outright
No leases. No PPAs. No third party with a lien on your equipment. Same as everything else we install.
Local, and staying that way
We are based in Glastonbury and serve Central Connecticut. When your generator needs service in year six, we are still here.
Maintenance plans available
A generator that is never serviced is a generator that does not start. We offer scheduled maintenance so it runs when the storm hits.
Sizing
How Much Generator Do You Actually Need?
There is no universal answer, only a load calculation on your specific home. Here is the general shape of it.
Essential Circuits
Covers: Furnace, sump pump, refrigerator, well pump, a few lights and outlets
Best for: Homeowners who want to protect against damage and get through an outage safely without running everything at once.
Managed with a smaller unit and a load-managed transfer switch.
Most of the House
Covers: Everything in Essential, plus most lighting, kitchen, home office, and one air conditioning zone
Best for: Families who work from home or have kids and want an outage to feel like a normal day.
The most commonly selected tier in Connecticut.
Whole Home
Covers: Every circuit in the panel, including full central air, electric range, EV charging, and heat pumps
Best for: All-electric homes, larger properties, and anyone who does not want to think about which appliance is running.
Requires the largest units and full-capacity transfer switch.
We will do the load calculation for free
A real sizing estimate takes a look at your panel, your fuel supply, and how you actually use your home. That is a conversation, not a web form.
Book a Free AssessmentBetter Together
Generator, Solar, and Battery Are Not Competing Products
People assume solar keeps the lights on during an outage. It does not, unless you have a battery. And a battery alone will not carry a Connecticut home through a four-day ice storm in January. These systems solve different problems.
Solar
Solves: Your monthly electric bill
During an outage: Shuts off during an outage unless paired with a battery, for utility worker safety.
Battery Storage
Solves: Short outages, peak-rate avoidance, and self-consumption
During an outage: Runs your essentials for hours. Recharges from solar during daylight. Limited in a multi-day winter storm with heavy cloud cover.
Generac Standby Generator
Solves: Long outages, worst-case weather
During an outage: Runs indefinitely on natural gas. Does not care about sunlight, snow cover, or how many days it has been.
The strongest setup is all three. Solar cuts the bill, the battery handles the daily swings, and the generator handles the ice storm. CellSun is one of the few companies in Central Connecticut that installs and services all three under one roof.
Talk to Us About a Combined SystemOur Process
From First Call to First Storm
Free assessment
We walk your property, check your panel, confirm your fuel supply, and run an actual load calculation. No pressure, no same-day-only sales tactics.
Honest proposal
You get a written quote with the model, the transfer switch, the fuel work, the permits, and the total. Line by line.
Permits and scheduling
We pull the electrical and gas permits with your town and schedule the install around your calendar.
Professional installation
Pad set, unit placed, gas line run, transfer switch wired, panel tied in. Typically completed in one to two days on site.
Inspection and commissioning
Town inspection, startup, and a full test under load. We show you exactly how it works and set up Mobile Link on your phone.
Ongoing service
Scheduled maintenance so the unit that cost you real money actually starts when the grid goes down.
Questions
Generator Questions Connecticut Homeowners Actually Ask
Is CellSun an authorized Generac dealer?
Yes. CellSun Home is an Authorized Generac Residential Dealer. That means we purchase equipment factory-direct, our team is factory-trained on installation and service, and warranty support runs through us directly with Generac. It is a meaningful distinction from contractors who simply resell a unit they picked up from a distributor.
How long can a Generac generator run continuously?
If it is connected to a natural gas line, it can run for as long as the gas supply holds, which in practice means through the entire outage. On propane, your runtime depends on tank size and load. We will size the tank around how long you want to be covered.
Do I need to be home for it to work?
No. The automatic transfer switch detects the outage and starts the generator on its own. If you are on vacation and a pipe would have frozen, the generator prevents it without you knowing there was an outage.
How loud is it?
Modern Generac home standby units are engineered for residential neighborhoods and run at a level comparable to a central air conditioning unit. It is noticeable, but it is not a construction site.
Does it require maintenance?
Yes. Like any engine, it needs periodic oil and filter service. Generac recommends service every six months. Skipping maintenance is the most common reason a generator fails to start during an outage. We offer maintenance plans for exactly this reason.
Can I install it myself?
In Connecticut, the electrical tie-in and gas connection require licensed trades and a permitted, inspected install. Beyond the legal requirement, an incorrectly wired transfer switch can backfeed the grid and endanger utility line workers. This is not a DIY project.
Will it work with my solar system?
Yes, and this is where CellSun has an advantage. Coordinating a generator, a solar inverter, a battery, and possibly a heat pump on one electrical panel is not trivial. We do all four, so nothing gets designed in isolation.
Can it replace my utility service?
No. A home standby generator is designed as backup power, not as a primary power source. Generac is explicit about that. If you want to reduce what you buy from the utility, that is what solar is for.
What size do I need?
The honest answer is that nobody can tell you over the phone. It depends on your panel, your appliances, and how much of your home you want running. We do a free load calculation and give you a real number.
How long does installation take?
The on-site work is typically one to two days. The full timeline from signed contract to a commissioned system depends on permit turnaround in your town and equipment lead times.
Do you service what you install?
Yes. We are local to Glastonbury and serve Central Connecticut. We are not a national installer that disappears after the check clears.
What happens if something goes wrong with the unit?
You call us. As an Authorized Generac Residential Dealer we are enrolled for both sales and service, and warranty claims run through the authorized dealer channel directly with Generac. You do not get bounced between an installer and a manufacturer.
Complete the System
The Next Outage Is Already on the Calendar. You Just Do Not Know the Date.
Every Connecticut homeowner who owns a generator bought it after an outage they will not forget. The ones who wait buy it after the next one. Get an honest assessment now, while there is no urgency and no pressure.
No obligation. No high-pressure close. We will tell you if you do not need one.
Generac, PWRcell, and Mobile Link are registered trademarks of Generac Power Systems, Inc. CellSun Home is an independent Authorized Generac Residential Dealer and is not owned or operated by Generac Power Systems, Inc.
CellSun LLC. CT HIC #0668341. Licensed and insured.
Every installation is unique. A final proposal requires a site assessment, load calculation, fuel source review, permitting, and current equipment availability.
Backup Strategy
Battery Backup: The Quiet Alternative
Some homes are better served by a battery, or by a battery paired with a generator. Batteries switch over instantly, run silently, use no fuel, and qualify for Connecticut Energy Storage Solutions incentives. Run the free estimator to compare.
Ready to Power Up Your Home?
Get a free, no-obligation quote for solar, roofing, HVAC, or any of our home services. We'll come to you.
Free estimates · No pressure · Licensed & insured