For most homeowners, a standby generator is the first major electrical project they have ever commissioned — and not knowing what the process looks like is half the hesitation. How disruptive is it? How long does it take? Who handles the permits? What happens on installation day?
After thirty-plus years of installations across New Hampshire and Massachusetts, Chamberlin Electric can answer all of that in detail. Here is the entire journey, step by step, exactly as our customers experience it — so when your project starts, nothing surprises you.
Step 1: The Free Site Visit and Assessment
Everything begins with a visit, not a phone quote. A Chamberlin Electric estimator comes to your home and evaluates the three systems your generator must integrate with: electrical, fuel, and the site itself.
On the electrical side, we inspect your panel and service, perform a load calculation, and talk through coverage strategy — whole house, essential circuits, or managed whole-house coverage. On fuel, we determine whether natural gas is available and adequately sized, or design the propane solution: tank size, placement, and line routing. On the site, we identify a location that satisfies manufacturer clearances from windows, doors, and vents, local code requirements, and the practical realities of New Hampshire — snow shedding off rooflines, plow drift patterns, ledge in the trench path, and service access.
You receive an itemized quote naming the exact model, transfer switch, and scope of work. No allowances, no vague line items. This is also the moment to ask about financing if spreading the investment out is helpful.
Step 2: Scheduling, Permits, and Utility Coordination
Once you approve the quote, we handle the paperwork. That means electrical permits with your municipality, gas permits where required, and coordination with the propane supplier or natural gas utility as needed. Each New Hampshire town runs permitting a little differently; because we work with these building departments constantly, this stage moves as fast as local process allows.
Lead time to installation day varies with season and equipment availability — another reason spring and summer are the smart time to start. After a major storm, demand spikes and calendars fill; the homeowners who called in June are the ones protected by October.
Step 3: Installation Day(s)
A typical residential installation takes one to two days on site. Here is how the work unfolds:
Setting the Pad and Placing the Unit
The crew prepares a level base engineered for our freeze-thaw cycles and sets the generator with proper clearances. Placement precision matters: this unit will live here for fifteen or twenty years through every season New England can produce.
Fuel Connection
For propane, the tank is set (if new) and a properly sized line is trenched and run to the unit with regulators protected from ice and snow. For natural gas, we tie into your existing service, verifying the meter and piping can deliver the volume and pressure the generator demands at full load — an undersized gas line is one of the most common defects we find in installations done by others.
Electrical Work and the Transfer Switch
This is the heart of the project. We mount the automatic transfer switch at your electrical panel, run conductors between the generator and the switch, and integrate the system so it can isolate your home from the utility and carry your loads safely. Everything is done to the National Electrical Code and the manufacturer’s installation requirements by licensed electricians — the same standard we have held since 1989.
Power Interruption: The Honest Answer
Yes, your power will be off for a portion of the electrical work — typically a few hours while we make the panel and transfer switch connections. We coordinate the timing with you in advance so you can plan around it. It is the last inconvenient outage your home should ever experience.
Step 4: Inspection, Startup, and Commissioning
Municipal inspectors verify the electrical and gas work — an accountability step you should insist on from any contractor. Then comes commissioning: our technicians start the unit, verify voltage and frequency, program the controller and weekly exercise schedule, and run a full simulated outage. We kill utility power, watch the generator start and transfer, confirm it carries your real loads — furnace, well pump, kitchen — and then restore utility power and verify a clean retransfer and shutdown.
Before we leave, we walk you through the system: what the controller displays mean, what the weekly exercise sounds like, how to check status, what to do if an alarm appears, and how Wi-Fi monitoring works if your model supports it. You also receive your warranty registration — our installations include the factory warranty — and guidance on the annual maintenance that keeps it valid.
Step 5: Life After Installation
From that day forward, the system is autonomous. It self-tests weekly, starts within seconds of an outage, and shuts down when the grid returns. Your responsibilities shrink to keeping the unit clear of snow and debris, glancing at the controller monthly, and scheduling annual professional maintenance.
The relationship with your installer, however, should not end at startup — and this is where dealer choice pays off for years. As a Generac PowerPro Premier Dealer, Chamberlin Electric maintains a dedicated service team, local parts inventory, and 24/7 emergency support out of Hudson, NH. The crew that installed your system is the same company that answers when a storm is howling — not a national call center dispatching whoever is available.
Warranty logistics work the same way. Because we are a factory-authorized dealer, warranty diagnosis, parts, and repairs happen locally through us — no shipping components, no arguing with a distant hotline about whether the installation was proper, because we are the ones who did it properly. Keep your annual maintenance current, and the warranty remains a genuine safety net rather than fine print. Many of our longest-standing customer relationships began with an installation and have continued through a decade or more of annual service visits — which is exactly how backup power is supposed to work.
How to Prepare Your Home Before the Crew Arrives
Our crews handle the heavy lifting, but a little preparation makes installation day smoother for everyone:
- Clear access to the electrical panel — stored boxes, shelving, and workbenches in front of the panel slow the most technical part of the day.
- Mark or tell us about anything buried: irrigation lines, invisible dog fences, landscape lighting, and drainage in the trench path. Public utility lines get located through Dig Safe before excavation, but private lines are only found if you tell us.
- Plan for the power interruption window: charge devices, plan meals that do not need the range, and let anyone working from home know the schedule.
- Secure pets — gates will be open, doors will cycle, and trenching equipment is loud.
- Think about landscaping preferences now. The unit’s location is fixed by code and clearances, but if you care about screening plantings later, mention it during the site visit so we can account for future growth around required clearances.
A Realistic Timeline, Season by Season
The most common question after “how much” is “how soon.” The honest answer moves with the calendar. In spring and early summer, the pipeline from signed quote to commissioned system is at its shortest — permitting is the main variable, and equipment availability is generally good. By late summer and fall, lead times stretch as storm-conscious homeowners fill the schedule. And after any major ice storm or hurricane remnant sweeps the region, demand explodes overnight: quote requests multiply, equipment allocations tighten across every dealer in New England, and installation calendars push out by months.
The pattern repeats every few years, and the lesson never changes: the cheapest, fastest, least stressful generator project is the one that starts in the quiet season. If you are reading this in the aftermath of a storm, get in the queue now — and if you are reading it on a sunny June afternoon, you are holding the best timing advantage there is.
Red Flags When Choosing an Installer
- Quotes given sight-unseen over the phone, with no load calculation or site walk.
- Vague proposals that name a generator but not the transfer switch, fuel scope, permits, or site work.
- Any suggestion of skipping permits or inspections — a shortcut you inherit forever.
- No in-house licensed electricians, or heavy reliance on unnamed subcontractors.
- No local service capability after the sale. Ask directly: who answers at 2 a.m.?
- Prices dramatically below every other quote. In generator work, the missing money always turns out to have been the important part.
Frequently Asked Questions
How long does it take to install a whole-house generator?
On-site work typically takes one to two days for a residential system. The full project timeline — from signed quote through permits, installation, and inspection — varies by season, municipality, and equipment availability, which is why starting before storm season is wise.
Will my power be shut off during installation?
Yes, briefly — usually a few hours while the transfer switch and panel connections are made. We schedule that window with you in advance. After commissioning, the system exists to make it the last unplanned-feeling outage you experience.
Do I need permits to install a generator in New Hampshire?
Yes. Electrical permits are required, gas permits where applicable, and the work must pass municipal inspection. Chamberlin Electric handles all permitting and inspection coordination as part of every installation — be wary of any contractor who suggests otherwise.
Where can a generator be placed on my property?
Placement must satisfy manufacturer clearance requirements from windows, doors, and vents, applicable codes, and practical service access — plus New Hampshire-specific factors like roof snow shedding and plow drifts. Our estimators identify compliant locations during the free site visit.
Can I install a standby generator myself?
No — and not merely as a legal matter. The project combines service-level electrical work, pressurized fuel gas, and utility isolation through a transfer switch; errors can cause fires, carbon monoxide hazards, or backfeeding that endangers utility line workers. This is licensed-professional work everywhere, and manufacturer warranties assume proper installation.
What does commissioning include?
Startup, controller programming, and a full simulated outage: we interrupt utility power, verify automatic start and transfer, confirm the generator carries your actual household loads, then verify clean retransfer and shutdown. You see the system do its job before we consider the installation complete.
Ready to Start? Your Free Site Visit Is Step One
The best time to install a generator is before you need it — and the process is easier than most homeowners expect when an experienced team handles every step. Chamberlin Electric has installed and serviced backup power across New Hampshire and Massachusetts since 1989, and as a Generac PowerPro Premier Dealer we stand behind every system with 24/7 local support.
Call (603) 595-9473 or request your free site visit online — and meet the next storm with the lights on.