The numbers
Most Charleston homeowners pay between $6,020 and $25,100 fully installed. The typical project lands around $12,050.
Range includes generator unit, automatic transfer switch, concrete pad, permits, gas line tie-in, electrical labor, and startup testing.
| Generator size | Typical installed range | Best for |
|---|---|---|
| 10–14 kW | $3,612 – $8,435 | Essential circuits only |
| 18–22 kW | $10,242 – $13,857 | Whole-home including AC |
| 24–26 kW | $13,255 – $21,335 | Large home, multi-AC, EV |
Sources
- SourceNailtheprice says $6,020 to $25,100 installed with most paying around $12,050
- SourceISCited says $15,000 installed average for standby generator
- SourceHomeAdvisor national data says $5,000 to $18,000 for whole-house generators
What drives the variance
- Generator size10 kW vs 26 kW swings the unit price by $8,000+
- Transfer switchAutomatic adds $2,000 to $4,000 over manual
- Gas line$2,000 depending on distance from meter per Nailtheprice
- Electrical panelUpgrade adds $2,000 to $4,000 if needed
- PermitsVaries by county, typically $400 to $600
- Concrete pad$500 for concrete pad per Nailtheprice
- LaborCoastal SC rates, hurricane demand affects pricing
For dealers
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