Generator Questions,
Straight Answers

If any of the following apply to your household, a whole-home generator is worth serious consideration:

• Frequent power outages — SE Michigan averages 1.5 outages per year, with some areas (especially Oakland County's tree-heavy suburbs) seeing 3–4 events annually
• Medical equipment — CPAP machines, oxygen concentrators, powered wheelchairs, or refrigerated medications that cannot go without power
• Sump pump dependency — if your finished basement floods without a sump pump, every outage is a potential $10,000+ water damage event
• Remote work — a 2–3 day outage means lost productivity, missed deadlines, and no internet connectivity
• Elderly or vulnerable family members — extreme heat or cold during outages creates real health risk
• Home security — security systems, cameras, and smart locks stop working during power loss

Michigan's combination of summer storms, winter ice events, and aging grid infrastructure means outages aren't a question of "if" but "when." The question is whether the cost of a generator is less than the cost of going without power for days — and for most homeowners with any of the factors above, the math is clear.

Not sure if your situation warrants it? Request a free assessment — there's no pressure, and you'll get real numbers for your specific home.

The average Michigan power outage lasts 7–12 hours, but major storm events regularly cause outages lasting 2–5 days. DTE Energy's SE Michigan service area is particularly affected due to overhead power lines and mature tree canopy.

Recent events that impacted SE Michigan:

• February 2023 ice storm — 800,000+ customers without power, some for up to 6 days
• Summer thunderstorm complexes — routinely cause 48–72 hour outages in residential areas
• August 2024 derecho — widespread 3–5 day outages across Oakland and Macomb counties

Oakland County and the northern suburbs (Bloomfield Hills, Rochester, Lake Orion, Oxford) tend to see longer restoration times because of overhead line exposure and dense tree cover. DTE's goal is 24–48 hour restoration for major events, but last-mile residential neighborhoods often wait longer.

Generator sizing is measured in kilowatts (kW). The right size depends on your home's square footage and — more importantly — which electrical loads need to run simultaneously. There are two approaches:

• Whole-home coverage — everything runs normally, including all HVAC, appliances, and circuits. This is what most buyers choose.
• Critical-load coverage — only essential systems (HVAC, refrigerator, sump pump, lights, internet). Smaller generator, lower cost, but you're choosing what stays off during an outage.

For most SE Michigan homes in the 2,000–3,500 sq ft range, a 20–24 kW generator provides whole-home coverage including central air conditioning. The most common sizing mistake is going too small — a generator that "technically" covers your panel can struggle when the A/C, sump pump, and kitchen appliances run simultaneously.

From signed contract to operational generator, expect 7–11 weeks for a natural gas installation in SE Michigan. Here's what the process looks like:

• Week 0: Site assessment and quote (free, about 1 hour)
• Week 1: Permit submission and DTE gas meter upgrade request (these run in parallel)
• Weeks 2–8: DTE meter upgrade queue — currently running 6–10 weeks. This is the critical path.
• Week 7–10: Installation day — 1–2 days on-site. We pour the pad, mount the generator, run gas and electrical connections, and do a full startup test.
• Week 8–11: Municipal inspection sign-off

The installation itself is fast. The DTE gas meter upgrade queue is what determines the overall timeline — and it can't be accelerated. We handle the DTE coordination, permit submission, and scheduling so you don't have to navigate the process yourself.

Standby generators need minimal but consistent maintenance to stay reliable. Here's the full schedule:

• Weekly (automatic): Your generator runs itself for 10–15 minutes to stay lubricated and confirm readiness. No action needed — this happens on a programmed schedule.
• Annually: Professional tune-up — oil change, spark plugs, air filter, battery check, coolant inspection, and full system test. Costs $150–$300 through a qualified technician.
• Every 3–5 years: Battery replacement. A $50–$80 part that keeps the starter motor ready.
• After extended runs (24+ hours): Oil check and usually an oil change before the next extended use.

Budget roughly $200–$350 per year for maintenance. Skipping annual service is the number one reason generators fail when they're actually needed — the unit sits idle for months and then needs to perform perfectly on a moment's notice.

We offer annual maintenance plans that cover everything above on a scheduled visit. Generac requires factory-authorized service for full warranty coverage, so make sure your technician carries the right certifications.

All three brands make excellent residential generators. Powerhouse Generator installs all major brands, so our recommendation is based on your specific situation — not a brand contract.

Brand	Best For	Notes
Generac	Most homeowners	~75% market share, widest dealer network, strong warranty support, best parts availability
Kohler	Noise-sensitive installs	Quieter operation, premium build quality, good choice when the pad is near bedrooms or patios
Cummins	Longevity-focused buyers	Commercial-grade durability, longest typical service life, formerly Onan (decades of industrial heritage)

For most SE Michigan homeowners, the brand matters less than proper sizing, correct installation, and ongoing maintenance. A well-installed Generac will outperform a poorly installed Kohler every time. We recommend based on your home layout, noise requirements, and budget during the free site assessment.

For more context on why installer expertise matters more than brand choice, see Why Your Electrician Shouldn't Install Your Generator.

Yes. A whole-home standby generator typically adds $5,000–$10,000 to a Michigan home's appraised value. In SE Michigan specifically, where buyers actively ask about backup power during showings, the impact can be even stronger.

The ROI case has three layers:

• Resale value: Real estate agents report that homes with installed generators sell faster and face less negotiation during inspection. It's a differentiator that buyers in outage-prone areas specifically look for.
• Insurance benefits: Some Michigan homeowners insurance providers offer premium discounts for homes with standby generators because they reduce the risk of frozen pipes, sump pump failure, and food spoilage claims.
• Avoided loss: A single major outage can cost $500–$5,000+ in spoiled food, hotel stays, water damage from sump pump failure, or lost work productivity. One avoided incident can offset a significant portion of the generator cost.

The combination of increased home value, insurance savings, and avoided loss makes a whole-home generator one of the highest-ROI home improvements in Michigan — especially in the outage-prone Oakland County suburbs. Ready to see what it looks like for your home? Get a free assessment.

Yes. Powerhouse Generator offers several financing paths to fit different budgets:

• Generac manufacturer financing — available through approved credit, with promotional deferred-interest terms and fixed monthly payments
• Home equity lending / HELOC — often the lowest rate option for homeowners with equity; interest may be tax-deductible
• Personal loans — unsecured options available through most banks and credit unions for qualified buyers

Most installations in the $11,000–$17,500 range work out to roughly $150–$250 per month on standard 60–84 month terms. Financing details are walked through during your free site assessment — no obligation, no pressure.

Yes — a standby generator installation requires permits in Michigan. Most installations involve two:

• Electrical permit — for the automatic transfer switch and panel connection, pulled by a licensed electrician
• Mechanical/gas permit — for the gas line extension to the generator pad

The specifics vary by municipality — Troy, Rochester Hills, Bloomfield Hills, and other SE Michigan cities each run their own building departments. Powerhouse Generator handles all permit applications, scheduling, and municipal inspections as part of every installation. You never have to contact a building department yourself.

Any contractor who offers to skip permits is putting you at risk — unpermitted installations create problems at home sale time and can void your homeowner's insurance coverage.

We serve Southeast Michigan — primarily Oakland and Macomb counties. Core service cities include:

• Bloomfield Hills & West Bloomfield
• Rochester & Rochester Hills
• Oakland Township & Washington Township
• Shelby Township & Troy
• Birmingham & Clarkston
• Lake Orion & Oxford
• Brighton, White Lake & Waterford

If you're in SE Michigan and not sure whether you're covered, call (248) 961-3647 or submit a quote request — we'll confirm your address immediately. For major commercial projects, we evaluate locations outside our standard area on a case-by-case basis.

Yes. We install and service backup generators for commercial properties throughout SE Michigan, including:

• Medical and dental offices
• Office buildings and retail spaces
• Cannabis cultivation and processing facilities
• Agricultural operations
• Light industrial and warehouse facilities

Commercial projects typically involve larger units (45–150 kW+), more complex transfer switch configurations, and stricter code requirements — all areas where our team has direct experience. A commercial site assessment covers load calculations, fuel source, pad placement, and code compliance specific to your property type.

Learn more about our commercial generator services or call (248) 961-3647 to schedule a commercial consultation.

Post-storm installations typically take 9–14 weeks rather than the standard 7–11 weeks. The reason: after a major storm event, hundreds of homeowners start the generator process simultaneously — and the DTE gas meter upgrade queue, which drives the overall timeline, stretches accordingly. The installation itself is still just 1–2 days; the wait is the DTE coordination queue.

Yes — automatically, within 10–30 seconds. This is the defining advantage of a standby generator over a portable unit. Here's the full sequence:

• Power goes out — the automatic transfer switch detects the outage within seconds
• Generator starts — engine cranks and reaches operating speed (10–20 seconds)
• Transfer switch activates — disconnects from utility grid and transfers your home to generator power
• Power is restored — your lights come on, HVAC resumes, sump pump runs. No action from you.

When utility power returns, the transfer switch automatically reconnects to the grid and the generator performs a cool-down cycle before shutting off. You don't need to be home. The generator operates the same whether you're asleep, at work, or on vacation.

The only ongoing self-activation is the weekly 10–15 minute exercise run — your generator tests itself every week automatically, so you always know it's ready. See our maintenance plans to ensure it stays that way.