- "ELECTRICIAN SINCE 2014"
- "TECL #30865"
- info@topnotchelectrician.com
- 324 W US Hwy 82, Sherman, TX 75092
It comes down to one question: what do you want running when the power’s out? Answer five quick questions and we’ll show you the size range North Texas homes like yours typically land in.
Free on-site sizing assessment always available — the quiz is a starting point, not a substitute for measuring your actual loads.
This is a starting range, not an engineering answer — real sizing happens on site, where we measure your actual loads instead of estimating them. The assessment is free and carries no obligation.
Get My Exact Size — Free Assessment Call (972) 379-8646Square footage matters, but it’s a proxy. What actually sets generator size is the list of things you want running at the same time during an outage — and whether that list includes air conditioning.
| Size range | Typical coverage in a North Texas home |
|---|---|
| 10–14 kW | Essentials and comfort: refrigerator, freezer, lights, internet, garage door, well pump, and select circuits — with load management deciding what runs when. |
| 18–24 kWWe install this most | True whole-home backup for most houses here, central AC included. The Generac 24kW is the unit we install most for exactly this reason. |
| 26 kW+ | Large homes, all-electric homes, and houses running multiple AC systems simultaneously. Sometimes the answer is one big unit; sometimes it’s smarter load management. |
If your home cooks, heats water, or warms itself with natural gas or propane, those loads never touch the generator — which is why gas-served homes can often back up everything with a mid-size unit. All-electric homes route every single load through the generator, so they typically need a tier up for the same lifestyle.
Most Sherman and McKinney neighborhoods. Continuous fuel from the utility line, and the furnace/water heater/range stay off the generator’s back. The most straightforward whole-home sizing.
Common across rural Grayson County. Same sizing logic as natural gas, plus one extra variable — tank capacity — which we factor into runtime expectations during the assessment.
All-electric home? Plan on the larger end of the ranges above — and lean harder on load management to keep the unit (and the budget) sensible. Size is also the #1 driver of what you’ll pay; our whole house generator cost guide for Texas shows how the tiers translate to dollars.
The miserable one: the generator overloads and sheds the loads you actually wanted — or worse, trips out entirely during the exact storm you bought it for.
Measured from your actual loads, your gas supply, and your panel — covers what matters on the worst day, without paying for capacity that never runs.
The quiet one: thousands extra for capacity that never runs, plus more fuel burn every time it does.
This is why we size every system on a free on-site assessment — measuring actual loads, checking your gas supply, and walking your panel — instead of estimating from a chart. It’s the same no-guesswork approach behind our Generac generator installation in Sherman & North Texas: right-size it, install it to factory spec, and protect the warranty on the whole investment.
We’ll call you shortly to set up your free sizing assessment. Need us sooner?
Call (972) 379-8646In most North Texas homes, yes — that’s exactly why it’s the size we install most. The honest answer depends on your specific AC equipment and what else runs alongside it, which is what the on-site assessment confirms. Homes with multiple large AC systems sometimes pair a 24kW with load management instead of jumping to a bigger unit.
Often, yes — load-shedding modules can be added to prioritize circuits on an existing properly-installed system. But it’s cheapest and cleanest to design it in from day one, which is why we talk through coverage goals before quoting a size, not after.
The generator protects itself: it sheds loads or trips on overload — meaning the AC you counted on may not run during the worst heat, or the system shuts down entirely mid-outage. Undersizing is the most expensive “saving” in backup power. If your generator is already installed and struggling, our generator service and repair team can assess whether load management or a configuration fix solves it.
Take the range from the quiz, then let us turn it into an exact answer — free, on site, no pressure, no overpaying for capacity you don’t need.
Factory-certified Generac installation, service & repair — TECL #30865 · Since 2014.
