Power outages in the Chicago suburbs aren’t just an inconvenience — they’re a threat to your home. Summer storms knock out power for hours or days, winter ice storms leave neighborhoods dark in sub-zero temperatures, and aging grid infrastructure means outages are becoming more frequent, not less.
For homeowners in Palatine, Schaumburg, and the northwest suburbs, a whole-house standby generator is no longer a luxury — it’s a critical home investment. Unlike portable generators that power a few devices, a whole-house generator automatically restores power to your entire home within seconds of an outage.
At MMDS, we handle generator installations from start to finish — electrical panel integration, gas line connection, concrete pad, and permitting. Here’s everything you need to know before investing in backup power for your home.
How a Whole-House Generator Works
A standby generator is permanently installed outside your home (like an AC unit) and connects to your electrical panel through an automatic transfer switch (ATS). Here’s the sequence:
- Power goes out — the ATS detects the loss within milliseconds
- Generator starts automatically — the engine fires up (no manual action needed)
- ATS transfers your home to generator power — within 10–30 seconds
- Utility power returns — the ATS switches back to grid power and the generator shuts off
The entire process is automatic. You might not even realize the power went out — your lights may flicker briefly and then everything continues as normal.
Choosing the Right Generator Size
Generator sizing is the most critical decision. Too small and you’ll have to choose which circuits to power. Too large and you overspend on equipment and fuel. Here’s our sizing guide for typical Palatine and Schaumburg homes:
| Home Size | Generator Size | What It Powers | Estimated Cost (Installed) |
|---|---|---|---|
| 1,500–2,500 sq ft | 14–18 kW | Essential circuits + AC or heat | $6,000–$10,000 |
| 2,500–4,000 sq ft | 20–24 kW | Whole house including HVAC | $10,000–$16,000 |
| 4,000+ sq ft | 30–48 kW | Large home, full power | $15,000–$25,000+ |
Factors That Affect Sizing
- Central AC size — a 5-ton AC unit draws ~6,000 watts on startup
- Electric vs. gas appliances — all-electric homes need larger generators
- Heat pump systems — heat pumps with electric backup heat may require 10+ kW just for heating
- Sump pump — essential in flood-prone areas (many Palatine homes have sump pumps)
- Medical equipment — CPAP machines, oxygen concentrators, refrigerated medications
- Home office — work-from-home needs mean no power = no income for many families
MMDS performs a detailed load calculation before every installation to size your generator correctly. We’d rather get it right than sell you a unit that can’t keep up.
Natural Gas vs. Propane Generators
Natural Gas (Most Popular in Palatine & Schaumburg)
If your home has a natural gas connection (most homes in Palatine and Schaumburg do), natural gas is usually the best fuel choice:
- Unlimited fuel supply — connects to your existing gas line, no refueling needed
- Lower fuel cost — natural gas is cheaper than propane in the Chicagoland area
- Cleaner burning — less maintenance than propane or diesel
- Always ready — no fuel tank to monitor or refill
Propane (Liquid Propane / LP)
For homes without natural gas service, propane is a reliable alternative:
- Requires a dedicated propane tank (250–1,000 gallon, installed on your property)
- Higher energy density than natural gas — slightly more power per unit of fuel
- Longer shelf life — propane doesn’t degrade like gasoline
- Requires monitoring tank levels and scheduling refills
The Installation Process
A whole-house generator installation is a multi-trade project. Here’s what to expect when MMDS handles your install:
Step 1: Site Assessment & Load Calculation (Day 1)
We visit your home to evaluate the best generator location (must meet setback requirements — typically 5 feet from windows and 18 inches from the house), assess your electrical panel, calculate your load requirements, and check gas line capacity.
Step 2: Permitting
Palatine and Schaumburg both require electrical and building permits for generator installations. MMDS handles all permit applications and scheduling of inspections. Typical permit timeline: 1–3 weeks.
Step 3: Concrete Pad
The generator needs a level concrete or composite pad. We pour or place the pad to manufacturer specifications.
Step 4: Electrical Work
Our licensed electricians install the automatic transfer switch at your main electrical panel, run conduit from the panel to the generator location, and wire everything to code. If your home has an older panel (Federal Pacific, Zinsco, or a 100-amp panel), we may recommend a panel upgrade as part of the project — this is actually a great time to do it.
Step 5: Gas Line Connection
We size and run a dedicated gas line from your gas meter to the generator. This ensures the generator gets adequate gas flow without affecting your furnace, water heater, or other gas appliances.
Step 6: Startup & Testing
We commission the generator, simulate a power outage to verify automatic transfer, test under load, program the weekly self-test schedule, and walk you through operation and maintenance.
Timeline
From contract to completion, most residential generator installations take 3–6 weeks, with 1–2 days of on-site installation work after permits are approved.
Top Generator Brands We Install
Generac
The market leader in residential standby generators. Generac invented the home standby generator category and offers the widest range of sizes (10–26 kW for residential). Known for reliable engines, extensive dealer network, and the Mobile Link remote monitoring app.
Kohler
Premium build quality with quieter operation than most competitors. Kohler generators use commercial-grade engines and produce cleaner power (less than 5% total harmonic distortion), making them ideal for homes with sensitive electronics.
Briggs & Stratton
A strong mid-range option with competitive pricing. Their Symphony II power management system allows a smaller generator to power more of your home by intelligently managing which circuits are active.
Generator Maintenance: Keep It Ready
A generator that doesn’t start during an outage is worse than not having one at all. Maintenance is simple but essential:
- Weekly self-test: Your generator automatically runs for 5–15 minutes each week to keep the engine lubricated and battery charged (you’ll hear it run — it’s normal)
- Oil & filter change: Every 200 hours of runtime or annually, whichever comes first
- Air filter: Check and replace annually
- Spark plugs: Replace every 2 years
- Battery: Check and replace every 3–4 years
- Professional inspection: Annual service to check fuel system, electrical connections, and transfer switch
MMDS offers annual generator maintenance plans. Learn about our maintenance services.
FAQ: Whole-House Generators for Palatine & Schaumburg
How loud is a whole-house generator?
Modern standby generators operate at 60–70 decibels from 23 feet — about the volume of a normal conversation. They’re significantly quieter than portable generators. Palatine and Schaumburg have noise ordinances, and today’s generators easily comply.
Will a generator increase my home’s value?
Yes. Studies estimate that a whole-house generator adds 3–5% to home value, and homes with generators often sell faster. In areas with frequent outages, it’s an increasingly expected feature.
Can I install a generator myself?
No. Generator installation requires licensed electrical and plumbing/gas work, building permits, and inspections. In Cook County, this work must be performed by licensed professionals. Attempting a DIY install is dangerous and will void the manufacturer’s warranty.
How much fuel does a generator use?
A 20 kW natural gas generator running at half load uses approximately 200–250 cubic feet of natural gas per hour, costing roughly $2–$4 per hour at current Nicor Gas rates. Actual fuel consumption depends on load — running your AC will use more fuel than just keeping the lights on.
Does MMDS handle the permits?
Yes. We handle all permit applications for Palatine, Schaumburg, Hoffman Estates, and surrounding municipalities. Permitting is included in our installation process — you don’t need to visit village hall.
Financing Your Generator Installation
A whole-house generator is a significant investment, but it doesn’t have to strain your budget. MMDS offers flexible financing through Sunbit and PowerPay, with options including:
- Low monthly payments
- Competitive interest rates
- Quick approval process
Many homeowners find that financing a generator costs less per month than the potential losses from a single extended outage (spoiled food, hotel stays, frozen pipes, sump pump failure).
Get a Free Generator Estimate
Don’t wait for the next outage to wish you had backup power. MMDS provides free, no-obligation generator consultations for homeowners in Palatine, Schaumburg, Hoffman Estates, Rolling Meadows, Inverness, Barrington, and the northwest suburbs.
📞 Call (847) 221-6280 or request a quote online to get started.
MMDS — Licensed electricians and HVAC professionals serving Chicagoland since 2004. See our full electrical services →