How Long Does a Standby Generator Last? (2026 Data)

Standby generator lifespan in 2026: 15–25 yrs with maintenance. Generac, Kohler, Cummins benchmarks and replacement signals.

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HomeScore forecasts repairs, replacement timing, and total ownership cost across 40+ home systems. Used by 8,200+ buyers, sellers, and long-term homeowners in 2026.