- "ELECTRICIAN SINCE 2014"
- "TECL #30865"
- info@topnotchelectrician.com
- 324 W US Hwy 82, Sherman, TX 75092
Real published ranges, what actually drives the number up or down, and the Texas-specific factors national guides miss — from a factory-certified Generac installer working North Texas homes since 2014.
“How much is this going to cost me?” is the first question every homeowner asks us — and the honest answer is a range until someone walks your property. This guide gives you the real ranges, what moves them, and the Texas-specific wrinkles, so the quote you eventually get makes sense instead of feeling like a number from thin air.
Generator size — measured in kilowatts (kW) — is the single biggest driver of your total. Bigger home, bigger loads, bigger unit. Here’s how the published 2026 ranges break down:
| Size | What it typically backs up | Typical installed range* |
|---|---|---|
| 10–14 kW | Essentials and partial-home coverage — fridge, lights, well pump, some HVAC with load management | $6,000 – $10,000 |
| 18–24 kWWe install this most | True whole-home coverage for most North Texas houses, central AC included. The 24kW is the size we install most. | $8,000 – $16,000 |
| 26 kW+ | Large homes, all-electric homes, multiple AC systems, complex sites with long gas or electrical runs | $12,000 – $18,000+ |
*Industry-published installed ranges (unit + standard installation), compiled June 2026 from Generac’s installation guidance and national cost guides. Your site conditions move the number — that’s what the free assessment pins down.
Two homes with the same square footage can land thousands apart, because the house itself is only half the equation — the other half is what the installation requires. Not sure which row you’re in? Start with what size generator you need — size is the #1 cost driver.
The generator is roughly half the project. National guides put typical home standby units at $3,000–$6,000 and the professional installation portion at $3,000–$5,000 for standard sites — more when the site demands extra work. The install side covers:
Most Sherman and McKinney neighborhoods have natural gas service, which usually means a straightforward fuel connection. Rural Grayson and Fannin County properties often run propane — the generator works just as well, but tank capacity, placement, and supply lines shape the install differently.
No gas appliances means every load is electrical — so all-electric homes often need a size tier up to cover the same lifestyle, which moves the total accordingly.
Trenching through our black clay is honest work. Long runs from the meter to the far side of the house are where trenching costs earn that per-foot range.
Sherman, McKinney, Denison, Allen, and the county each handle generator permits a little differently. It doesn’t change the price dramatically — but it changes the paperwork and timeline, which is why we handle all of it in-house.
Between ice storms, spring severe weather, and summer conservation alerts, North Texas homeowners have learned outages aren’t hypothetical. That’s exactly why correct sizing matters more than the cheapest possible install — the generator earns its keep on the worst day of the year, not the average one.
This is why we quote after a free on-site assessment instead of over the phone: the honest number comes from your meter location, your gas service, and what you actually want powered — not from a price sheet. It’s the same approach we detail on our Generac generator installation page: size it right, install it to spec, protect the warranty.
It depends on what an outage costs you. A freezer full of food, a work-from-home week, a well pump that doubles as your water supply, medical equipment, pipes in a hard freeze — for many North Texas families, one bad multi-day outage justifies years of ownership. For running costs, national guides estimate roughly $30–$170 per day of fuel during an actual outage depending on unit size and load — a number you only pay when the grid fails and everything in your house keeps working.
What we tell neighbors honestly: if outages in your area are rare, brief, and low-stakes for your household, a generator is a comfort purchase — a good one, but a comfort. If you’ve got well water, medical needs, a home office, or you simply never want to live the 2021 week again, it’s infrastructure.
We’ll call you shortly to set up your free on-site assessment. Need us sooner?
Call (972) 379-8646Three reasons: what’s included (permits, gas work, and trenching are sometimes quoted separately or skipped), unit sizing (an undersized quote looks cheaper until it can’t run your AC), and installer quality. Compare quotes line by line — the cheapest number is often the least complete one.
During an actual outage, national cost guides estimate roughly $30–$170 per day in fuel depending on the unit’s size and how much of the house it’s carrying. Outside of outages, the unit sips fuel briefly during its weekly self-test — the day-to-day cost of ownership is mostly annual maintenance.
Yes, generator installations require permits and inspections across North Texas cities, and requirements differ a bit between Sherman, McKinney, Denison, Allen, and county jurisdictions. We pull the permits and manage the inspections on every installation — it’s built into how we quote, not an add-on surprise.
Plan for routine annual service the same way you would for an HVAC system — it keeps the unit reliable and helps keep the Generac warranty valid. We offer generator service, repair, and maintenance plans that handle it on a schedule so you never think about it.
Standby generators involve gas supply, high-amperage electrical work, and a transfer switch that interacts with the utility grid — this is licensed-electrician territory legally and practically, and an improper install can void the Generac warranty on a five-figure machine. The place to save money is right-sizing and smart placement, not skipping the professional install.
A free on-site assessment turns this whole page into one exact, no-pressure quote for your home — sizing, fuel, trenching, permits, all of it.
Factory-certified installation that protects your Generac warranty. Flexible financing available.
