Generators & Specialty

Quick answer: The right standby generator size starts with what you want to keep running in an outage — whole-home, or essential circuits like heat, the well pump, the refrigerator, and the sump pump. MC Electric runs an on-site load calculation and, as a licensed electrical and HVAC contractor, installs the generator, transfer switch, and panel work as one job.

A whole-home automatic standby generator is a permanently installed unit that watches your power around the clock and starts on its own within seconds of an outage — no cords, no gas cans, no stumbling outside in an ice storm. At MC Electric Comfort Systems, we design, install, and service standby generators across Central Maine, the Kennebec Valley, and the Midcoast, handling both the electrical and the mechanical side of the job in-house as a veteran-founded, dual-trade contractor.

Why Maine Homes Are a Strong Case for Standby Power

Maine is one of the toughest places in the country to keep the lights on. Long rural distribution lines run for miles through heavily wooded terrain, and our winters throw the worst of it at those lines — freezing rain that coats limbs and conductors in ice, heavy wet snow, and wind that brings whole trees down across the road. Year after year, Maine ranks among the worst states for power reliability, and our outages tend to last longer than the national norm because crews have to reach remote spans to make repairs.

For a homeowner, the stakes are higher than a dark living room. A multi-day winter outage can mean a freezing house, burst pipes, a sump pump that quits while the basement fills, spoiled food, a well pump that leaves you with no running water, and no way to run a CPAP or home-office equipment. A standby generator is the difference between riding out a storm in a warm, functioning home and evacuating to a hotel — if you can even get down the road.

Automatic Standby vs. Portable Generators

The generator most people own is a portable unit, and it has real limits during exactly the storms Maine gets. You have to be home to start it, drag it outside, and keep it fueled with gasoline that goes stale and is hard to find when the whole region loses power. It cannot safely power your furnace, well pump, or hardwired circuits without a proper transfer switch, and back-feeding a portable into a wall outlet is dangerous — it can electrocute a lineworker and destroy your equipment.

An automatic standby generator solves all of that because it is a permanent part of your home’s electrical system. It sits on a pad outside like a central AC unit, runs on propane or natural gas so there is no refueling, and is wired through an automatic transfer switch. When the power drops, it starts and restores your home in seconds — whether you are asleep, at work, or away — and shuts itself down when utility power returns. The trade-off is simple: a portable is cheaper upfront and fine for occasional attended backup, while a standby unit protects the whole house automatically, every time.

How an Automatic Transfer Switch Works

The automatic transfer switch is the brain of a standby system, and it is what makes the whole thing automatic and safe. It is a separate enclosure wired between the utility line and your electrical panel. It constantly monitors incoming utility power, and the moment it detects an outage, it signals the generator to start, waits a few seconds for the engine to come up to speed, and then transfers your home’s load from the dead utility feed over to the generator.

Just as importantly, the transfer switch electrically isolates your home from the grid while the generator runs. That isolation is what prevents your generator from back-feeding power onto utility lines that a lineworker may be repairing — a code requirement and a genuine safety issue, not a formality. When utility power comes back and holds steady, the switch transfers your home back to the grid and tells the generator to cool down and shut off. You do nothing. Because the transfer switch ties directly into your panel, getting it sized, located, and wired correctly is squarely an electrician’s job — which is exactly why a generator is, at its core, an electrical project.

Sizing: Whole-Home vs. Essential-Circuit (Managed-Load) Systems

The single most important decision in a generator project is sizing, and it comes down to how much of your home you want to keep running. There is no one-size answer — the right unit depends on your home’s electrical load, the appliances you need to run, and your budget. Broadly, there are two approaches:

• Whole-home backup: A larger generator sized to carry essentially everything in the house at once — heating, well pump, water heater, kitchen, and central air or a heat pump. During an outage your home runs as if nothing happened. This is the most seamless option and the most capacity, which generally means a larger unit and a higher investment.
• Essential-circuit (managed-load) backup: A right-sized generator paired with smart load management that powers the circuits that matter most — furnace or boiler, well pump, refrigerator and freezer, sump pump, and key lighting — while intelligently managing or shedding large intermittent loads so they don’t overload the unit. Load-management technology lets a smaller, more affordable generator cover more of the home than its raw rating would suggest, because big draws like an electric range, dryer, or AC compressor take turns rather than all running at once.

We size every system from your home’s actual electrical load rather than guessing from square footage. That up-front load calculation is what keeps you from buying far more generator than you need — or, worse, ending up with one that trips and stalls the first time the well pump and the furnace kick on together.

Fuel Options: Propane or Natural Gas

Automatic standby generators run on either propane or natural gas, and the right choice usually comes down to what is already available at your property. Natural gas is convenient where a municipal gas line is present — the generator draws from the same continuous supply as the rest of the house, so there is never anything to refill. Natural gas service is limited across much of rural Maine, though, which makes the more common choice here propane: it stores indefinitely in an on-site tank, burns clean, and pairs naturally with the propane many Maine homes already use for cooking, hot water, or heat.

Either way, the fuel feed is a mechanical gas-piping job that has to be sized for the generator’s demand and connected safely. We coordinate that hookup as part of the install — including working with your propane supplier on tank sizing and placement — so the gas side and the electrical side are planned together instead of left for you to stitch across two separate trades.

The Install Process, Done With Veteran Precision

We are a veteran-founded company, and that shows in how we run a generator install: plan the work, then work the plan. A standby system has electrical, mechanical, and code components that all have to come together, and we map the whole sequence before we ever break ground. Here is how a typical project goes.

• 1. Load assessment and sizing. We evaluate your panel and your home’s electrical load, talk through whether you want whole-home or managed essential-circuit coverage, and size the generator and transfer switch to match.
• 2. Pad and placement. We set a level, code-compliant pad — typically a poured pad or composite base — and position the unit to meet manufacturer and code clearances from windows, doors, and the property line.
• 3. Gas hookup coordination. We run and connect the propane or natural-gas supply, sized for the generator, and coordinate with your fuel supplier on the tank where needed.
• 4. Transfer switch and panel integration. We install the automatic transfer switch, integrate it with your electrical panel, and add load management if the system calls for it — the electrical heart of the project, done by licensed electricians on our own team.
• 5. Permit and inspection. We pull the required electrical permit, schedule the inspection, and make sure the installation passes — this is standard, expected, and how you know the work was done to code.
• 6. Startup and walk-through. We commission the generator, run a live transfer test to confirm it starts and carries your load correctly, and walk you through how it operates and what its maintenance needs are.

The Dual-Trade Advantage: One Team for the Whole Generator

This is where MC Electric Comfort Systems is genuinely different, and a generator is the clearest example of why our model matters. A standby generator is fundamentally an electrical project — transfer switch, panel integration, load management, and code-compliant wiring — layered on top of mechanical work, namely the pad, the gas piping, and the engine itself. It sits right at the seam between the two trades.

Most contractors live on one side of that seam. An electrician may handle the transfer switch but sub out the gas work; an HVAC or fuel company may run the gas but call in an outside electrician for the panel. That means two companies, two schedules, two invoices, and a finger-pointing risk if the gas side and the electrical side do not line up. We do all of it in-house — one licensed team handling the load calculation, the pad, the gas hookup, the transfer switch, and the inspection as a single, coordinated, accountable project. On a system this integrated, that “one team, one call” difference is the difference between a clean install and a stalled one. It also means we catch panel problems early: many older Maine homes run 100-amp service or an aging panel that needs attention before it can support a generator, and we handle that electrical panel upgrade on the same project rather than sending you off to find an electrician.

Maintenance and Testing Keep It Ready

A standby generator is an engine that may sit idle for months and then be asked to run for days under full load — usually in the worst weather of the year. That is exactly the scenario where neglected equipment fails, so routine upkeep is not optional. Most units run a brief self-test on a set schedule (often weekly) to exercise the engine and confirm they are ready, but that automatic exercise does not replace hands-on service.

• Annual service: oil and filter changes, spark plugs, air filter, battery check, and a full inspection of the engine and electrical connections — the same way you would maintain any engine you depend on.
• Transfer-switch and load testing: verifying the switch actually transfers under load and the generator carries your home correctly, so you find any problem during a test instead of during an outage.
• Seasonal readiness checks: confirming fuel supply, battery health, and cold-weather starting before the heart of storm season.

We offer ongoing service and can fold your generator into one of our maintenance plans so the testing and annual service happen on schedule without you having to track it. And because we cover both trades, if a service visit turns up an electrical issue at the transfer switch or panel, we solve it on the same trip instead of referring you elsewhere.

Questions Maine Homeowners Ask Us About Standby Generators

How fast does an automatic standby generator turn on after the power goes out?

Within seconds. The automatic transfer switch detects the outage, signals the generator to start, waits briefly for the engine to reach speed, and then transfers your home to generator power — typically a matter of seconds. You do not need to be home or do anything; when utility power returns, the system transfers back and shuts the generator down on its own.

What size standby generator do I need for my Maine home?

It depends on whether you want whole-home backup or essential-circuit coverage, and on your home’s actual electrical load. A whole-home system carries everything at once and needs a larger unit; an essential-circuit setup uses smart load management to power the critical circuits — heat, well pump, refrigeration, sump pump — with a smaller, more affordable generator. We do a load calculation up front and size the system to your home rather than guessing, and we’ll give you a firm recommendation and price at your free estimate.

Should I choose a propane or natural gas generator?

It usually comes down to what is available at your property. If you have municipal natural gas, that is convenient because the generator draws from a continuous supply with nothing to refill. Across much of rural Maine, natural gas is not available, so propane is the common choice — it stores indefinitely in an on-site tank and pairs well with the propane many homes already use. We’ll help you weigh both based on what your home has and coordinate the gas hookup either way.

How much does a standby generator cost to install in Maine?

It varies widely with the size of the unit, whole-home versus essential-circuit coverage, fuel type, the gas hookup, and whether your panel needs an upgrade — so the only honest answer is that we’ll give you a firm number at your free estimate. For a breakdown of what drives the price, see our guide to standby generator cost in Maine. We provide upfront pricing with no surprises in the final invoice.

Do I need a permit and inspection to install a generator?

Yes. A standby generator install requires an electrical permit and an inspection, which is exactly what you want — it confirms the transfer switch, panel integration, and wiring were done to code. We handle the permit and schedule the inspection as part of every job, so it is one less thing for you to manage.

Why hire a company that does both the electrical and the gas work?

Because a generator sits right between the two trades — it is an electrical project (transfer switch, panel, load management) plus mechanical work (pad and gas piping). Hire an electrical-only or gas-only contractor and the other half gets subbed out: two companies, two schedules, two invoices, and a finger-pointing risk if the sides don’t line up. We do all of it in-house as one accountable team, which is faster, cleaner, and the most reliable way to get a standby system installed right.

Ready to Stop Worrying About the Next Outage?

If you are tired of losing heat, water, and a working home every time an ice storm or a windstorm knocks out the grid, an automatic standby generator is the permanent fix — and we are the one team that handles the entire project, electrical and mechanical, from sizing to inspection. We install and service standby generators for homeowners throughout storm-exposed Central Maine and the Midcoast, including towns like Winthrop and Bath, from our home base in West Gardiner. Contact us today for a free estimate, and we’ll size the right system for your home, give you a firm number, and make sure you are ready before the next storm rolls in.

Generator sizing, fuel choice, permitting, and cost vary by home; we provide a firm quote and confirm code requirements at your free on-site estimate.

What our customers say

“I had them replace my main panel, put in a generator hookup, and a car charger at my primary residence. Always on time and done correctly. Very reasonable pricing too. I have built houses and owned my own construction company, so I know what I’m looking at — these folks are the real deal.”

— Rob, Google review

Related reading: What size standby generator do you need?