A whole-home surge protector is strongly recommended alongside a standby generator because the utility-to-generator transfer process, even on a well-designed automatic transfer switch, involves a brief voltage transition that can stress sensitive electronics. Additionally, when utility power returns after an extended outage, voltage restoration is sometimes uneven and brief spikes can accompany the reconnection event. A surge protector installed at the main panel absorbs these transients before they reach connected devices.
Generac True Power Technology delivers less than 5 percent total harmonic distortion during steady generator operation, which is clean enough for computers, medical equipment, and home automation systems. But the transfer event itself, typically lasting under one second, falls outside the steady-state operating period where THD is measured. A whole-home surge protector rated at 40,000 amps or higher surge current capacity handles both generator transfer events and external lightning-induced surges on the utility feed.
Surge protectors for whole-home installation are available as panel-mount devices from manufacturers including Eaton, Leviton, and Square D, and install directly in the main panel in minutes. The combination of a Generac generator, a 200-amp transfer switch, and a whole-home surge protector forms a complete power quality and continuity system. Browse our Generac home standby generators or contact us for recommendations. Free Freight Insurance Included.