Cost of a 28 kW standby generator
28 kW generator cost
Main systems + extra loads for large homes Installed cost ranges from$13,459 to$20,909, unit plus installation.
Installed cost range
$13,459–$20,909unit + labor + transfer switch + pad + permits
Source: HomeAdvisor / Angi: whole-house generator installation cost (2026) · retrieved July 2026
What's in the number
| Component | Range | Source |
|---|---|---|
| Generator unit | $9,509–$9,509 | Our catalog: models at 28 kW (msrp_cents) |
| Labor (licensed installer)Per-project; rises with site prep, gas-line, and panel work. | $1,500–$5,000 | HomeAdvisor / Angi: whole-house generator installation cost (2026) |
| Transfer switch (automatic, ATS)Residential 100–200A ATS. The source's $30k ceiling is commercial switchgear, excluded here. | $2,000–$5,000 | HomeAdvisor / Angi: whole-house generator installation cost (2026) |
| Concrete pad~$50–$75/sq ft; an 18-sq-ft pad runs about $1,000 in the high case. | $400–$1,000 | HomeAdvisor / Angi: whole-house generator installation cost (2026) |
| Permits (electrical + fuel)Typically one electrical permit and one fuel-line permit, $50–$200 each. | $50–$400 | HomeAdvisor / Angi: whole-house generator installation cost (2026) |
What moves your number
- Unit price. Our catalog's 1 model at28 kW range from$9,509 to$9,509 (MSRP). Sales and bundling move this.
- Transfer switch. A bundled ATS (included with some SKUs) cuts the switch line item; an oversized or whole-house ATS adds to it.
- Site work. Long gas-line runs, a subpanel, or an electrical upgrade push labor toward the high end.
- Region. Labor rates vary; our estimator lets you set a low/avg/high cost area.
28 kW models in our catalog
1 sourced model at this size; every spec cited.
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