Standby generators in Dearborn, MI.

A home standby generator in the Dearborn area typically costs $9,000 to $16,000 installed, including the generator, transfer switch and labor. Size drives most of it. A unit that runs essential circuits sits at the low end; a whole-home unit with a larger gas line sits at the high end.

The quote covers more than the box on the pad. There is the generator, the automatic transfer switch, the concrete or composite pad, the wiring between them, the gas line from the meter, and the electrical and mechanical permits. The gas side is its own question: a large generator may need a bigger gas line from the meter, and in some cases DTE Gas has to upgrade the meter or regulator, which adds time and sometimes cost. A portable generator with a manual interlock kit is a much cheaper option for people who are home during outages and can start it themselves; ask about that on the call if the budget is tight.

Most Dearborn houses land between 14 and 24 kW, sized from what you want to keep running. Essential circuits (furnace, sump pump, fridge, some lights and outlets) need less. Running central air and an electric range during an outage needs more. A load calculation sets the size.

The question to answer first is what you cannot live without during an outage. In a Dearborn basement, the sump pump is usually at the top of the list, then the furnace blower in winter and the refrigerator and freezer. With a smart transfer switch and load management, a mid-size generator can run most of a house by shedding the big loads, like the air conditioner, when something else starts. An oversized generator costs more up front and runs inefficiently. An undersized one trips when the furnace and the well pump or sump start together. The electrician sizes it from the actual loads, not from the largest unit the store sells.

Mostly for summer storm outages and the basement. When the power goes out in a heavy rain, the sump pump stops right when it is needed most. A standby generator starts on its own and keeps the pump, furnace and fridge running until DTE restores power.

Dearborn has seen serious basement flooding, including the August 2014 and June 2021 storms, and a lot of homeowners came out of those wanting a backup that does not depend on them being home. A standby generator checks itself by running a short exercise cycle on a schedule, so it is ready when an outage starts. It also helps in winter: a furnace needs electricity for its blower and controls, so a gas furnace is useless in an ice-storm outage without backup power. A generator does not replace a backflow valve or a battery backup on the sump pump, but it covers the long outages those cannot.

Beside the house, on a level pad, at the clearances the manufacturer and the code require from windows, doors and vents. On narrow Dearborn lots the side yard is often tight, so placement is the first thing to plan. Exhaust must never reach a window or a neighbor's opening.

The manufacturer's installation manual sets the distances from operable windows, doors, air intakes and the house wall, and the City of Dearborn checks placement as part of the permit. The generator also needs to be reasonably close to the gas meter and the electrical panel to keep the runs short. On some East Dearborn lots with houses close together, the backyard is the only spot that works, which means a longer gas line and a longer wire run. Noise is worth thinking about too, since the unit runs its exercise cycle on a schedule; most units let you set that for a weekday afternoon instead of Saturday morning.

The automatic transfer switch watches DTE's power, starts the generator when it fails, and moves the house over to generator power. It also keeps generator power from feeding back into DTE's lines, which protects the line crews working on the outage. When DTE's power returns, it switches back.

Standby systems like this fall under NEC Article 702 for optional standby systems, and the generator itself under Article 445. The transfer switch either replaces the main breaker as a service-rated switch or sits next to the panel and feeds a subpanel of essential circuits. Never connect a portable generator to the house by plugging it into a dryer outlet or any other outlet; that sends power backward through the panel and onto the street, and it can kill a lineworker. A proper interlock or transfer switch is the only safe connection, and it needs a permit.

Plan on yearly service: oil and filter, spark plugs on schedule, a battery check and a look at the transfer switch. The generator exercises itself on a schedule, but someone should look at it at least once a year. Keep snow, leaves and grass clippings clear of the unit.

Most home standby generators have a small starting battery, and a weak battery is the most common reason one fails to start during an outage. Michigan winters are hard on those batteries. Oil changes depend on run hours, so a long outage can bring the next service forward. Keep the area around the unit clear; drifting snow can block the air intake, and grass clippings get into the louvers. If the generator shows a fault light, call for service before the next storm rather than during it. The manufacturer's warranty may also require registered maintenance, so keep the receipts.

The install itself usually takes one to three days of work, but permits, the gas side and the inspection set the calendar. Plan on a few weeks from the quote to a running generator, longer if DTE Gas has to change the meter or the generator is back-ordered.

The order is usually: site visit and load calculation, quote, permits from the City of Dearborn, the pad, the generator set in place, the transfer switch and wiring, the gas line, then inspections and start-up. The gas line is run by a gas fitter under a mechanical permit, and the electrician coordinates around it. Popular generator sizes sometimes sell out after a big storm season, so ordering early in spring is smarter than ordering the week after an outage. Once it is running, the installer should walk you through the controller, show you how to read a fault, and set the exercise schedule.