Get a realistic total cost breakdown — unit, labor, permits, gas line, concrete pad, and electrical work — before you call your first contractor.
| Item | Usually Included | Watch For |
|---|---|---|
| Generator unit | Yes | Verify model number; not just "22 kW unit" |
| Transfer switch / ATS | Sometimes | Confirm included; some quote separately |
| Concrete pad | Usually | Confirm pad dimensions and thickness |
| Electrical labor | Yes | Verify includes rough-in AND final inspection |
| Gas line labor | Yes | Verify includes pressure test |
| Permit fees | Often, not always | Explicitly confirm permits are pulled |
| Inspection scheduling | Usually | Confirm installer will be present at inspections |
| Propane tank (if propane) | Rarely | Tank usually billed separately or leased |
| Panel upgrades | No | Quoted separately if needed |
| Landscaping restoration | No | Gas line trenching disrupts landscaping |
| Acoustic enclosure | No | If HOA or noise ordinance requires one |
| Extended warranty | No | Manufacturer warranty included; extended is optional |
| Cost Item | Annual Estimate | Notes |
|---|---|---|
| Annual maintenance service | $150–$300 | Oil, filters, spark plugs, battery check |
| Natural gas (exercise cycle only) | $20–$60 | Weekly 20-min test at low load |
| Propane (exercise cycle only) | $30–$80 | Higher fuel cost per BTU than gas |
| Oil changes (air-cooled) | $50–$100 | Every 100–200 hours of operation |
| Battery replacement (every 3–5 years) | $80–$150 | Amortized annually |
| Extended warranty (optional) | $200–$400 | Generac 5-year extended plan, etc. |