A standby generator is the single biggest generator-related purchase most homeowners will make. The math is genuinely different depending on your situation, so here's the honest breakdown rather than a blanket recommendation — including the financing options and outage-history questions that most sales conversations skip past on the way to a quote.
The real cost
A 22–24kW Generac or Kohler standby generator — enough for most homes including central AC — runs $8,000–$15,000 fully installed on natural gas, or $10,000–$18,000 for a comparable Kohler. That figure includes the unit, automatic transfer switch, concrete pad, gas line or propane tank hookup, electrical permit, and licensed electrician labor. Ongoing costs add up too: fuel ($2–$10 per hour depending on fuel type), annual service ($200–$500), and the generator's expected 15–20+ year lifespan with proper maintenance.
The case for standby
- Zero effort during an outage — power restores automatically within 10–30 seconds, no matter the time of day or whether you're home.
- Whole-home capacity — runs central AC, electric range, and every circuit simultaneously without the load management a portable requires.
- Indefinite runtime on natural gas — no fuel storage, no gas station trips, no running out mid-outage.
- Critical for medical needs or frequent travelers — automatic operation matters most when someone depends on continuous power or the home is regularly unoccupied.
- 15–20+ year lifespan spreads the cost over a long ownership period.
The case against standby
- High upfront cost relative to a portable generator setup, which can cover essential circuits for a quarter to a third the price.
- Overkill for infrequent, short outages — if your area sees a handful of brief outages per year, the ROI math is harder to justify.
- Requires natural gas or a maintained propane tank to realize the indefinite-runtime advantage.
- Fixed installation — unlike a portable, it can't travel with you or be used for anything beyond home backup.
The financing angle that changes the calculation
Sticker price alone can make standby feel out of reach, but most dealers offer financing plans, sometimes with an introductory 0% period, that spread the cost over several years. At that point, the relevant comparison isn't "$10,000 upfront" versus "$2,000 upfront for a portable setup" — it's a monthly payment, often comparable to a modest utility bill increase, against the value of never worrying about outages again. This doesn't make standby the right choice for everyone, but it's worth running the actual monthly numbers before ruling it out purely on the headline installed price.
A realistic look at how often you'll use it
Before committing to a standby purchase, it's worth an honest look at your area's actual outage history rather than a general sense of "we lose power sometimes." Many utilities publish outage frequency and duration data, or you can track your own household's experience over the past few years. A pattern of frequent short outages (a few hours, several times a year) tells a different story than one long outage every five years — both might feel equally memorable in hindsight, but they justify very different levels of investment. Standby generators earn their cost fastest in households with either genuinely frequent outages or a small number of very long ones; households with occasional brief outages get comparatively less value per dollar spent on the standby premium over a portable alternative.
What happens during the installation process
Once you commit to a standby purchase, the installation itself typically unfolds over several weeks: a site visit to confirm placement and gas/electrical requirements, permit application, the physical installation (concrete pad, gas line or propane tank connection, electrical work, automatic transfer switch), and final inspection. Most installers handle the permit process directly rather than requiring homeowner involvement beyond signing off, though it's worth confirming this upfront with your specific installer. The generator itself typically arrives and gets installed in a single day once permits are approved, with the surrounding site prep and inspection scheduling accounting for most of the overall timeline.
Frequently Asked Questions
Does a standby generator increase home resale value?
Many real estate agents and buyers view a properly installed standby generator as a desirable feature, particularly in areas prone to frequent or extended outages, though it's rarely a dollar-for-dollar return on the installation cost. It's more accurately viewed as a quality-of-life and risk-mitigation investment than a resale value play.
How long does a standby generator last?
With proper maintenance, a standby generator typically lasts 15-20+ years. The engine itself is rated for 10,000+ hours, and typical residential use (around 52 hours per year including weekly self-tests) means the engine's rated lifespan far exceeds its practical service life before other factors (parts availability, technology updates) become the reason for replacement.