Generac vs. Cummins: Which Standby Generator Should You Choose?
By LumoWatt Editorial Team · Reviewed by Licensed electrical contractor (reviewer bio pending) · Updated 2026-06-15
| Generac | Cummins | |
|---|---|---|
| Price | $2,000–$8,000 | $3,500–$10,000 |
| Warranty | 5 years | 5 years |
| Noise | 60–67 dB | 58–65 dB |
Quick answer
Generac wins on price and installer availability — it has the largest certified-installer network of any brand, so you'll typically get more competing quotes. Cummins wins on quieter operation and a broader diesel option for larger homes.
Price
Generac: $2,000–$8,000 (unit only, before installation). Cummins: $3,500–$10,000. Cummins commands a premium primarily for its higher-end liquid-cooled units.
Noise
Generac: 60–67 dB at 23 feet. Cummins: 58–65 dB at 23 feet. If your unit will sit near a bedroom window or a neighbor's property line, Cummins's lower end is a meaningful difference in practice.
Warranty
Both brands offer a standard 5-year limited warranty on residential standby units; extended warranties are available from both through certified installers.
Which is right for you
Choose Generac if: you want the widest choice of local certified installers and the lowest entry price for a mid-size home.
Choose Cummins if: noise is a real constraint (tight lot, close neighbors) or you need a diesel-fuel option for a larger property.
Frequently asked questions
- Which brand has more certified installers?
- Generac generally has the largest network of certified installers in most US metros, which tends to mean more competing quotes and easier access to warranty service.